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Yes, a voltage variable potentiometer (also known as a voltage divider) is still wired in series with the circuit. In this configuration, the potentiometer is used to divide the voltage between its two output terminals, which are connected to the rest of the circuit. By adjusting the position of the potentiometer's wiper, the voltage output from the potentiometer can be varied, allowing for precise control of the voltage supplied to the circuit. It's important to note that in this configuration, the potentiometer's resistance value should be chosen based on the current requirements of the circuit, and the maximum voltage that will be present across the potentiometer. Exceeding either of these limits can cause the potentiometer to overheat or fail.
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I watched a video on this, right before this one. While, not a bad video, it can’t even begin to compete with yours. The “inner-workings” graphic you used, really helped me to get a fundamental understanding of what’s going on, and how to utilize each pin of the potentiometer, for whatever end result I’m seeking for my circuits behaviour.’THANKS
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I'm just getting started on my electronics journey and your explaination is perfect. Thank you for making this video and I will look forward to checking out your other videos as i learn
I have a question, for the example at 3:10 ..... why does the left terminal have both black wires? Couldn't the left terminal not be used at all and go straight from the negative battery to the motor?
While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal. For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
I'm new to electronics so forgive me for my stupid question. Please help me understand? At 4:46 you said: "If we adjust the wiper in a way that introduces high resistance, more voltage will drive to the motor, resulting in turning the DC motor faster." The motor IS running faster as you said BUT at this point the negative terminal on the battery is connected directtly to one terminal on the motor while the positive terminal from the battery takes the shortest path trhough the POT going straight via the wiper to the other terminal on the motror. Isn't this the LEAST resistance for the current? Why do you say the opposite of what seems to he happening?
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed. However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed. For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed. However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed. For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
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Note: Never exceed the current through the potentiometer's rating or "Wattage" For Higher currents use a transistor [BJT or Mosfet] to control the load with the Pot controlling the transistor.
Thank you for the comment! You are absolutely correct. It is important to ensure that the current flowing through the potentiometer does not exceed its wattage rating. Exceeding the wattage rating can cause the potentiometer to overheat and even burn out. Using a transistor such as a BJT or Mosfet to control the load with the potentiometer controlling the transistor is a great way to ensure that the current through the potentiometer stays within its rated limit. This configuration is commonly known as a voltage divider circuit and is a widely used technique in electronics. Thanks again for the helpful comment!
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I don't quite get the "3 wire configuration" example at 5:04, wouldn't a 2 wire setup like the previous LED example give the same outcome of adjusting the motor speed, what's the difference and advantage of controlling the motor this way? Thank you for the video, it really helped me understand how a potentiometer works!
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In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed. However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed. For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
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That is very good info, clearly explained. But, for audiophiles, it would be great to know the effect on voltage & amperage, in each case, when the same identical potentiometer is used as a tone vs a volume control. From this video, and my knowledge that a volume control is a voltage divider...can I presume that tone control is varying amperage along with resistance? And, if so, what is the science between variations in resistance & amperage on the dominant tones or resonant peak of an audio signal???
Couldn't you have achieved the same thing with the motor by using the first configuration? Only use 2 pins from the potentiometer and if you want to increase the speed of the motor just decrease the potentiometer resistance, and if you want to decrease the spin then add more resistance. I fail to see how using the third pin is useful for adjusting the speed when you can just use 2 pins. Can someone explain please
While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal. For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
The difference is subtle. If you use all the 3 pins, you are employing not a variable resistor, but a voltage divider (see voltage divider in the internet to know more). In this case, the whole voltage of, say, a battery, is supplied to the whole device (suppose 6V). The DC motor is connected to the wiper and one of the legs of the potentiometer. The resistance of the part NOT connected to the DC motor determines the fall of potential, so if that resistance is low, the drop of voltage will be low and more voltage will remain for the part connected to the DC motor. This results in the fact that the more resistance is dedicated to the part of the DC motor, the more power it gets. It is a little bit brainy but if you follow the reasoning you soon well realize that it is really that way.
A voltage divider allows you to take a voltage and produce a lower voltage. They typically comprise a couple of fixed resistors. By using a potentiometer you can make that output voltage variable. Using a potentiometer in a 2 pin arrangement gives you a variable resistor, not a voltage divider. It is just a resistor which is changeable. And a resistor sets the current. A changing resistor allows you to change the current. So it all depends on what you are trying to do, what you actually need for your application, do you want a fixed or variable voltage: => voltage divider or potentiometer, or do you want to set a current to a desired magnitude or changeable magnitude: => resistor or potentiometer using two pins.
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You're welcome! We are glad that you found the information useful. Adding a potentiometer to your emergency light project can be a great idea, especially if you want to adjust the brightness of the lights. With a 10k potentiometer, you should have plenty of range to adjust the brightness to your desired level. Good luck with your project! 😉
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Great video! However there is one part that isn't clear to me. Please tell me if I understand this part correctly. The resistance in a potentiometer depends on the length of the resistance element. When you adjust the knob on a potentiometer, the wiper either shortens or lengthens the element. Therefore, a longer element will have more resistance, while a shorter element will have less resistance. For instance, in volume control, the longer the resistance element when you turn it down, the lower the volume and the shorter the element when you turn it up, the higher the volume. As someone who had no prior knowledge of electronics, I thought the resistance element inside the pot had different points of resistance as opposed to the wiper actually shortening and lengthening the resistance element.
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed. However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed. For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
at 4:43, the ( + ) and the ( - ) of the battery are technically connected to each other and form a closed circuit, won't this overheat the battery and damage it ??????🤔🤔🤔
The + and - terminals of the battery are indeed connected to each other in a closed circuit when connected to the potentiometer and motor in a voltage divider configuration. However, this does not necessarily lead to overheating or damage to the battery. In a voltage divider circuit, the current flowing through the circuit is determined by the total resistance of the circuit and the applied voltage. The potentiometer and motor act as resistors in the circuit, and the resistance of the potentiometer can be adjusted to control the amount of current flowing through the circuit. As long as the potentiometer is properly adjusted to limit the amount of current flowing through the circuit, the battery should not overheat or be damaged. It is important to choose a potentiometer with a suitable power rating and to calculate the appropriate resistance values to ensure safe operation of the circuit.
Thank you for your comment and question! Could you please clarify which specific wiring configuration you're referring to? This will help us better understand the issue and provide an appropriate response.
Hi, I have followed all the instructions as in the video, I am using a 100k potentiometer and a 1 to 6 volt mini dynamo, but why is the Potassio emitting smoke, please give me instructions bro
Thank you for the explanation! However, I don't understand the voltage divider part. When the voltage which passes through the motor is changed by the potentiometer, will the current change too?
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Thanks for the enlightenment, but is it safe to use this the same method for a dc 12v motor with 50k potentiometer? Please do it reply, thank you. From Nigeria
Yes, it should be safe, as long as the motor and the potentiometer are rated for the same or higher voltage than the battery. However, using a 50k potentiometer may not be the most appropriate for controlling the speed of a 12-volt DC motor because it may not provide enough resolution or precision to accurately control the motor speed.
hi, very interesting your explanation, it gonna help on my project, i have just one question before buy it, i have an mobility scooter, is my project now. i want make sure that i'll replace the original potentiometer which is (TSR 24KN resistanceResistance. Like 200k or 50k. Looking forward to hear from you. Appreciate
The TSR 24KN potentiometer has a nominal resistance of 200kΩ. However, it is possible that your scooter's control system may have been designed to work with a potentiometer of a different resistance value. To ensure compatibility and avoid potential damage to your scooter's control system, you should refer to the manufacturer's documentation to determine the correct replacement potentiometer for your mobility scooter.
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@@Automatedosure. This response is a bit late but yes I will definitely share this video to many of my friends so that it grows ur channel cause I think I deserve more subs.
I have a question about the 2 wire configuration with the led. If I connect the cable to the 3 pin(negative) and would turn it counterclockwise that the resistance increases and the led becomes weaker and if I turn it clockwise it gets brighter? so the exact opposite as mentioned in the video, thanks for replying😊
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed. However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed. For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
It depends on how the potentiometer is used. If you use it in a 2 pin configuration then you have a variable resistance and as the resistance increases the current through it will lower. If you use it in a 3 pin configuration, you are creating a potential divider (you will need to research yourself the theory of operation and the math behind it). Here the output is a voltage (not a current) across the resistance between one of outer pins and the middle wiper pin. Ohms Law says: V=IR, increase the resistance for a given value of current and the voltage across that resistance increases. So when used as a potential divider, and the output is across a variable resistance in the potentiometer, then as that resistance increases, the output voltage increases.
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Hello. I have an interesting case. What if I have a variable resistance load (500 ohms-7000 ohms). I want to increase the voltage or force a current amount across it to generate controllable heat. How can I achieve this result with a power supply having an output of 0-30V and 0-10A? I appreciate your help
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is that correct high resistance allows more voltage to the motor and low resistance on the wiper decreases the voltage at motor . Surely increasing the resistance drops the voltage at the motor due to voltage drop
I need help. I have a 750 Watt incandescent light bulb that I want to operate adjustable between 0 and 100 watts. I’m currently using a conventional dimmer switch and the switch and bulb are humming-hence, I’m looking at possibly using a potentiometer. IF a potentiometer will work for this application, how do I ‘size’ it? It’s running on a 120vac 60Hz supply. Thank you
I never understood this, but what it never explained clearly in the voltage divider scenario is that the wiper is tapping into different voltage points as the wiper is turned; the voltage drops along the resistive element at these points, and this is the voltage point the motor gets (best recognized because of Kirchoff's voltage law). The variable resistor scenario is more intuitive while thinking of Ohm's law.
But brother how can I determine that which configuration I have to use ? For example last week we did in laboratory common source amplifier experiment.
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Can you explain to me how to select the value of potentiometer such that when I have a supply voltage of 9 volts, and I draw 50 milliamps of current, the voltage doesn't drop by more than 0.1 volt?
Indeed, selecting the appropriate potentiometer value can be a bit tricky. To answer your question, you'll need to calculate the resistance value of the potentiometer based on the voltage drop and current draw specifications. You can use Ohm's law (V = IR) to solve for the resistance value. Resistance value = 0.1 / 0.05 = 2 ohms. However, keep in mind that potentiometers have a limited power rating, so you should also make sure that the potentiometer can handle the current draw without overheating or exceeding its power rating.
Of course! 👍 You can measure the potentiometer's resistance on a PCB even if other components are already installed. ⚡ Make sure your multimeter is set to ohm mode and connect the probes to the potentiometer's terminals. If possible, take the measurement while the circuit is powered off for more accurate results. 🔧📏 Hope this helps! 😊
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Sorry for the stupid question: If the DC motor was wired up in the same way as the LED, wouldn't the effect be the same? I.E. That the potentiometer is controlling how much power the appliance is using?
In fact, that's a great question my friend. While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal. For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
How would this thing work on a lathe motor whereby you starve the motor of current, to slow the speed of the motor, then introduce, a heavy load to it. Will that burn the motor out in short order? And how reliable are these units per-se, are they themselves prone to failing? Thanks.
When it comes to controlling the speed of a motor, especially in applications like a lathe where heavy loads are involved, it is important to consider the motor's specifications and limitations. While a potentiometer-based voltage divider method can be used for speed control, it may not be the most suitable or reliable method for high-power applications like lathes. In scenarios where you want to slow down the motor by starving it of current and then introduce a heavy load, it can lead to increased stress and strain on the motor. This can potentially result in overheating, reduced efficiency, and even motor failure if the motor is not designed to handle such loads. For heavy-duty applications like lathes, it is recommended to use motor control techniques specifically designed for high-power and variable-speed operations. This typically involves using motor controllers, motor drivers, or specialized speed control systems that can handle the power and current requirements of the motor while providing better control and protection mechanisms. Regarding the reliability of these control units, it depends on the quality of the components, the design of the circuit, and the operating conditions. While potentiometers themselves are generally reliable, other components in the control circuit, such as transistors or motor drivers, may be more prone to failure if not properly selected or protected.
Thanks, this is one of the best explanations I have found on the topic tonight. Still, I am not sure (pretty much being just dumb, unable to recollect my early school years) what the practical difference would be. In my case, if I have a DC motor, will I be able to kill it completely (0 rpm) with a pot ... and if so, will the circuit still be draining the battery (the bat power being transferred to heat in the pot)? I know what I want is possible with a pot regulator board (or LM317?), but I was wondering if I can make it simpler. Does the pot resistance matter in erms of the voltage provided? Guess I need to do more homework. :D
Yes, it is possible to stop a DC motor completely (0 rpm) using a potentiometer (pot), but it will depend on the specific characteristics of the motor and the potentiometer used. If the potentiometer has a high enough resistance and power rating, it can be used to reduce the voltage supplied to the motor, which will slow it down until it stops completely. Regarding the battery drain, if the motor is stopped completely, there should be no current flowing through it, so the circuit will not be draining the battery. However, if the potentiometer is dissipating power as heat, it will consume some power from the battery, which will be dissipated as heat in the potentiometer. This means that you need to ensure that the potentiometer has a high enough power rating to handle the power dissipation and avoid overheating.
Yes. To do this, you will need a potentiometer with the same resistance as the speaker. You can find the resistance of your speaker by looking at its specifications or by measuring it with a multimeter. Once you have a potentiometer, you will need to connect it in series with the speaker. To do this, connect one end of the potentiometer to the positive terminal of the speaker and the other end of the potentiometer to the positive terminal of the DVD component. Connect the negative terminal of the speaker to the negative terminal of the DVD component. Once the potentiometer is connected, you can adjust the volume of the speaker by turning the potentiometer knob. Turning the knob clockwise will increase the volume, and turning the knob counterclockwise will decrease the volume.
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what's the difference the first digram and the second diagram?both gave out more current and less current,the motor also spin fast when received more current so does the light,
While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal. For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
🎯 Key Takeaways for quick navigation: 00:03 🧪 Potentiometer is a mechanically driven analog device used in electronics projects. 00:31 🔄 Potentiometer is a variable resistor that can easily change resistance by turning a knob. 01:01 🔌 Potentiometer has three terminals: two fixed and one variable, forming an arc of a circle. 01:30 🔗 The middle terminal (wiper) moves across resistive element, altering electrical contact. 01:58 🔍 Multimeter helps measure potentiometer resistance; wiper's position affects value. 02:27 🔧 Wiper position changes resistance; multimeter probes measure resistance accordingly. 03:21 💡 Potentiometer used as variable resistor for LED brightness control. 04:18 ⚙️ Potentiometer acts as voltage divider for motor speed control. 05:15 📚 Understanding the basic concepts of potentiometers for electronic projects.
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Determine the specifications of the potentiometer and DC motor. Check the voltage and current ratings of both components to ensure they are compatible. Connect the positive terminal of the DC motor to the positive terminal of the power source (e.g., battery or power supply). Connect the negative terminal of the DC motor to the center terminal (wiper) of the potentiometer. Connect one of the outer terminals of the potentiometer to the negative terminal of the power source. Connect the other outer terminal of the potentiometer to the positive terminal of the power source. Set the potentiometer to its mid-point position. Turn on the power source and observe the motor's rotation direction. If the motor rotates in the opposite direction to what you desire, swap the connections of the motor's positive and negative terminals. Rotate the potentiometer knob to control the motor speed and direction. Rotating the knob to the right will increase the voltage across the motor terminals, causing the motor to rotate in one direction, while rotating the knob to the left will decrease the voltage across the motor terminals, causing the motor to rotate in the opposite direction.
So how does a potentiometer with all 3 leads connected not short out? The only thing I can think is the wiper always remains neutral, allowing current to flow to neutral regardless of the potential applied.
When all three leads of a potentiometer are connected, it forms a voltage divider circuit where the wiper acts as a variable resistor. The resistance between the wiper and one end of the potentiometer will change as the wiper is moved, allowing for a variable voltage output. To address your question, the wiper does not necessarily remain neutral. Rather, it adjusts its position along the resistive element of the potentiometer, which allows for a variable voltage output. This does not cause a short circuit because the resistive element has a high resistance value, which limits the current flow through the circuit. Therefore, even when all three leads are connected, the current flow across the potentiometer is limited by the resistance value of the element. I hope this helps! Let me know if you have any further questions. 😉
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Excellent video. Well done.
Thanks for your precious support 😉
For the voltage variable one, is it still wired in series?
Yes, a voltage variable potentiometer (also known as a voltage divider) is still wired in series with the circuit. In this configuration, the potentiometer is used to divide the voltage between its two output terminals, which are connected to the rest of the circuit.
By adjusting the position of the potentiometer's wiper, the voltage output from the potentiometer can be varied, allowing for precise control of the voltage supplied to the circuit.
It's important to note that in this configuration, the potentiometer's resistance value should be chosen based on the current requirements of the circuit, and the maximum voltage that will be present across the potentiometer. Exceeding either of these limits can cause the potentiometer to overheat or fail.
Thank you for the video. i plan to create some videos for school students. may i know what software you used in producing this video?
That's all I wanted to know .
Precise, straight forward, no nonsense
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That's exatcly what I wanted to know, in a short time period all necessary information given, two thumbs up!! 👍👍
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yes
This is the best video I’ve ever seen on any electronic component, it’s so precise, quick, and intuitive.
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I watched a video on this, right before this one.
While, not a bad video, it can’t even begin to compete with yours. The “inner-workings” graphic you used, really helped me to get a fundamental understanding of what’s going on, and how to utilize each pin of the potentiometer, for whatever end result I’m seeking for my circuits behaviour.’THANKS
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From your tone, it seems that we are compatriots. It was great and good luck🌹
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I'm just getting started on my electronics journey and your explaination is perfect. Thank you for making this video and I will look forward to checking out your other videos as i learn
Perfectly clear video. I had an aha moment during you explanation. Now potentiometers make sense. Thank you.
Excellent explanation on how a volume pot works, thank you.
I have a question, for the example at 3:10 ..... why does the left terminal have both black wires? Couldn't the left terminal not be used at all and go straight from the negative battery to the motor?
While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal.
For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
I'm new to electronics so forgive me for my stupid question. Please help me understand? At 4:46 you said: "If we adjust the wiper in a way that introduces high resistance, more voltage will drive to the motor, resulting in turning the DC motor faster." The motor IS running faster as you said BUT at this point the negative terminal on the battery is connected directtly to one terminal on the motor while the positive terminal from the battery takes the shortest path trhough the POT going straight via the wiper to the other terminal on the motror. Isn't this the LEAST resistance for the current? Why do you say the opposite of what seems to he happening?
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed.
However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed.
For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
Exactly my question
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed.
However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed.
For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
Thank you for this guide! Very useful from light dimmers to amplifiers. Greetings from Philippines.
Thank you for taking the time to watch and comment on our video! We are glad to hear that you found the guide useful, and I appreciate your support all the way from the Philippines. If you have any questions or suggestions for future content, please don't hesitate to let us know. Thanks again, and have a great day! 😉
This video is a sample of "Perfection"!
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Great job, well explained to the point! MarkMannM2
Note: Never exceed the current through the potentiometer's rating or "Wattage" For Higher currents use a transistor [BJT or Mosfet] to control the load with the Pot controlling the transistor.
Thank you for the comment! You are absolutely correct. It is important to ensure that the current flowing through the potentiometer does not exceed its wattage rating. Exceeding the wattage rating can cause the potentiometer to overheat and even burn out.
Using a transistor such as a BJT or Mosfet to control the load with the potentiometer controlling the transistor is a great way to ensure that the current through the potentiometer stays within its rated limit. This configuration is commonly known as a voltage divider circuit and is a widely used technique in electronics.
Thanks again for the helpful comment!
Great way to explain a circuit. Thank you this will help me a lot with my railroad projects.....Cheers U.K. modeler
Glad it helped. We wish you the best of luck with your upcoming projects 😉
Thank you so much Sir ❤, it's very helpful video to beginning of Potentiometer user
it couldn’t be better in all aspects.
thanks.
Receiving comments like this is like a fuel for us to produce more informative video 🙃
That is exactly I wanted to to know.
You crystal clearly, and neatly explained it, thank you so much ! 💯
Thank you so much for taking the time to watch our video and leave such a kind comment! We're thrilled to hear that our explanation was crystal clear and helpful to you. It's comments like yours that motivate us to continue producing informative and engaging content for our viewers. We appreciate your support and hope to see you again soon! 😉
Thanks, i really needed this Video as a beginner electrician, thumbs up 👍
Glad it helped 😉
@@Automatedo can you please upload a video for a beginner?
I don't quite get the "3 wire configuration" example at 5:04, wouldn't a 2 wire setup like the previous LED example give the same outcome of adjusting the motor speed, what's the difference and advantage of controlling the motor this way?
Thank you for the video, it really helped me understand how a potentiometer works!
Easy Explaination.
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Already had done @@Automatedo
Increasing the resistance through the potentiometer will decrease the speed of the motor, not increase. other than that, good video👍👍
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed.
However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed.
For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
Great video. I learnt all I need to know about potentiometers in just as few minutes
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Very well explained. Thank you. Peace
I didn’t know how a variable resistor works. I have a broken lamp that I needed to control it’s brightness. Now I know how to connect wires
Glad it helped 😍 Stay tuned for our upcoming videos. We are sure they will be helpful as well 😉
Great explanation sir, now i am getting the feel and imagination of it. Thank you sir
Glad to hear that 😉
That’s awesome. Complete explanation. 👌👌👌
Our goal is to explain in the simplest way possible. Thanks for watching the video
That is very good info, clearly explained. But, for audiophiles, it would be great to know the effect on voltage & amperage, in each case, when the same identical potentiometer is used as a tone vs a volume control. From this video, and my knowledge that a volume control is a voltage divider...can I presume that tone control is varying amperage along with resistance? And, if so, what is the science between variations in resistance & amperage on the dominant tones or resonant peak of an audio signal???
Excellent video, thank you
I usually don't leave a comment however this a exceptions. i loved the video. Thank you
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Couldn't you have achieved the same thing with the motor by using the first configuration? Only use 2 pins from the potentiometer and if you want to increase the speed of the motor just decrease the potentiometer resistance, and if you want to decrease the spin then add more resistance. I fail to see how using the third pin is useful for adjusting the speed when you can just use 2 pins. Can someone explain please
While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal.
For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
The difference is subtle. If you use all the 3 pins, you are employing not a variable resistor, but a voltage divider (see voltage divider in the internet to know more). In this case, the whole voltage of, say, a battery, is supplied to the whole device (suppose 6V). The DC motor is connected to the wiper and one of the legs of the potentiometer. The resistance of the part NOT connected to the DC motor determines the fall of potential, so if that resistance is low, the drop of voltage will be low and more voltage will remain for the part connected to the DC motor. This results in the fact that the more resistance is dedicated to the part of the DC motor, the more power it gets. It is a little bit brainy but if you follow the reasoning you soon well realize that it is really that way.
Thanks for sharing the your valuable thought and experience 🙏
@@tanner1985 that's what is happening, but *why* is the voltage divider preferred over a variable resistor?
A voltage divider allows you to take a voltage and produce a lower voltage.
They typically comprise a couple of fixed resistors.
By using a potentiometer you can make that output voltage variable.
Using a potentiometer in a 2 pin arrangement gives you a variable resistor, not a voltage divider.
It is just a resistor which is changeable.
And a resistor sets the current.
A changing resistor allows you to change the current.
So it all depends on what you are trying to do, what you actually need for your application, do you want a fixed or variable voltage: => voltage divider or potentiometer, or do you want to set a current to a desired magnitude or changeable magnitude: => resistor or potentiometer using two pins.
Excellent explanation ❤
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Thank you sir very much for this great information ☺️. I was thinking to add this in my emergency light project (I have 10k potentiometer).
You're welcome! We are glad that you found the information useful. Adding a potentiometer to your emergency light project can be a great idea, especially if you want to adjust the brightness of the lights. With a 10k potentiometer, you should have plenty of range to adjust the brightness to your desired level. Good luck with your project! 😉
Superb instruction video!
Glad you enjoyed it! 😉
Really very informative and interesting Video 💕💕💕
Glad you think so!
It is a great video with great graphics. Would you mind sharing the Software details that are used for this great and knowledgeable video?
Thanks for showing interest to this video 🙂 | This video is created in our graphic department
@@Automatedo Keep up the good work !!
Nice video shot, thanks, keep it up :)
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Wow! This answer is what I'm looking for! Thanks
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Excellent video!! concise and clear. Thank you very much!!
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very well explained. Thank you.
Good explanation 👍
Excellent explenation even for me! Hi from Ukraine! Thank you so much!
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Great video! However there is one part that isn't clear to me. Please tell me if I understand this part correctly. The resistance in a potentiometer depends on the length of the resistance element. When you adjust the knob on a potentiometer, the wiper either shortens or lengthens the element. Therefore, a longer element will have more resistance, while a shorter element will have less resistance. For instance, in volume control, the longer the resistance element when you turn it down, the lower the volume and the shorter the element when you turn it up, the higher the volume. As someone who had no prior knowledge of electronics, I thought the resistance element inside the pot had different points of resistance as opposed to the wiper actually shortening and lengthening the resistance element.
At 4:46, is it meant to be LOW resistance? Not high
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed.
However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed.
For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
at 4:43, the ( + ) and the ( - ) of the battery are technically connected to each other and form a closed circuit, won't this overheat the battery and damage it ??????🤔🤔🤔
The + and - terminals of the battery are indeed connected to each other in a closed circuit when connected to the potentiometer and motor in a voltage divider configuration. However, this does not necessarily lead to overheating or damage to the battery.
In a voltage divider circuit, the current flowing through the circuit is determined by the total resistance of the circuit and the applied voltage. The potentiometer and motor act as resistors in the circuit, and the resistance of the potentiometer can be adjusted to control the amount of current flowing through the circuit.
As long as the potentiometer is properly adjusted to limit the amount of current flowing through the circuit, the battery should not overheat or be damaged. It is important to choose a potentiometer with a suitable power rating and to calculate the appropriate resistance values to ensure safe operation of the circuit.
The wiring doesn't make any sense to me, I am following the electron flow method. Please advice if am wrong
Thank you for your comment and question! Could you please clarify which specific wiring configuration you're referring to? This will help us better understand the issue and provide an appropriate response.
It is so helpful thank u so much sir.
Most welcome 😉
Hi, I have followed all the instructions as in the video, I am using a 100k potentiometer and a 1 to 6 volt mini dynamo, but why is the Potassio emitting smoke, please give me instructions bro
Thank you for the explanation! However, I don't understand the voltage divider part. When the voltage which passes through the motor is changed by the potentiometer, will the current change too?
Excellent explanation
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Everything makes sense except the last part. Higher resistance means less voltage and lover speed, not vice versa 🤷
Basically resistor are made for limit current and current is relative to voltage if current drop due to resistance voltage also drop simple
Very well explained, thanks.
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Thanks for the enlightenment, but is it safe to use this the same method for a dc 12v motor with 50k potentiometer? Please do it reply, thank you. From Nigeria
Yes, it should be safe, as long as the motor and the potentiometer are rated for the same or higher voltage than the battery.
However, using a 50k potentiometer may not be the most appropriate for controlling the speed of a 12-volt DC motor because it may not provide enough resolution or precision to accurately control the motor speed.
hi, very interesting your explanation, it gonna help on my project, i have just one question before buy it, i have an mobility scooter, is my project now. i want make sure that i'll replace the original potentiometer which is (TSR 24KN resistanceResistance. Like 200k or 50k. Looking forward to hear from you. Appreciate
The TSR 24KN potentiometer has a nominal resistance of 200kΩ. However, it is possible that your scooter's control system may have been designed to work with a potentiometer of a different resistance value.
To ensure compatibility and avoid potential damage to your scooter's control system, you should refer to the manufacturer's documentation to determine the correct replacement potentiometer for your mobility scooter.
Good working bro ❤👍🏻👍🏻👍🏻
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@@Automatedo yes bro definitely 💖
Nice sir iam from india.good sir
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👍 wonderful video! Quick and simple
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@@Automatedosure. This response is a bit late but yes I will definitely share this video to many of my friends so that it grows ur channel cause I think I deserve more subs.
Thank you, this really helped! But is my resister expose to get read hot?
I have a question about the 2 wire configuration with the led. If I connect the cable to the 3 pin(negative) and would turn it counterclockwise that the resistance increases and the led becomes weaker and if I turn it clockwise it gets brighter? so the exact opposite as mentioned in the video, thanks for replying😊
Hello, I thought that more resistance decrease voltage and current flow? for the potentiometer 3 wire configuration. Could you please explain
I think he misspoke. Pretty sure he meant to say low resistance first, then high resistance
Yes , he said wrongly
In general, if a potentiometer is used as a voltage divider to control the speed of a DC motor, introducing more resistance will lead to a slower motor speed.
However, there may be certain cases (the illustrated example in this video) where introducing more resistance could result in a higher motor speed.
For example, if the motor control circuit is designed to work with a specific range of potentiometer resistances, and the resistance is currently too low, introducing more resistance to bring it into the appropriate range could result in a higher motor speed.
It depends on how the potentiometer is used.
If you use it in a 2 pin configuration then you have a variable resistance and as the resistance increases the current through it will lower.
If you use it in a 3 pin configuration, you are creating a potential divider (you will need to research yourself the theory of operation and the math behind it).
Here the output is a voltage (not a current) across the resistance between one of outer pins and the middle wiper pin. Ohms Law says: V=IR, increase the resistance for a given value of current and the voltage across that resistance increases.
So when used as a potential divider, and the output is across a variable resistance in the potentiometer, then as that resistance increases, the output voltage increases.
great explanation
Glad you liked it 😍
thank u so much sir. best in utube
Nicely explained thank you 👍
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Thank you so much!
And thank you for watching this video from our channel. Cheers 🙌
very nice explanation
perfect explanation 👍
Nice but viper divide the voltage can't understand....pls share me link of other potentiometer video so can I understand more clearly
Thanks
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Hello. I have an interesting case. What if I have a variable resistance load (500 ohms-7000 ohms). I want to increase the voltage or force a current amount across it to generate controllable heat. How can I achieve this result with a power supply having an output of 0-30V and 0-10A? I appreciate your help
Wow very use full video
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is that correct high resistance allows more voltage to the motor and low resistance on the wiper decreases the voltage at motor . Surely increasing the resistance drops the voltage at the motor due to voltage drop
Superb work👍
Thank you! Cheers!
What is the name of the program you made the video on? It means the program in which the electrical circuits were drawn. Can I know it?
Dear Abdalla, these fabulous tutorials are made by our animation department. I will send them an email and ask them about it.
@@Automatedo Thank you very much. I want to know this information please reply. Thank you
They are using Photoshop to design the elements and use the after effect to give the elements motion
Thanks for sharing🙏🏻
Thanks for visiting
I didn't get the last experience. Also what is a resistance good for ? Hopefully, u answer me
I need help. I have a 750 Watt incandescent light bulb that I want to operate adjustable between 0 and 100 watts. I’m currently using a conventional dimmer switch and the switch and bulb are humming-hence, I’m looking at possibly using a potentiometer. IF a potentiometer will work for this application, how do I ‘size’ it? It’s running on a 120vac 60Hz supply.
Thank you
I never understood this, but what it never explained clearly in the voltage divider scenario is that the wiper is tapping into different voltage points as the wiper is turned; the voltage drops along the resistive element at these points, and this is the voltage point the motor gets (best recognized because of Kirchoff's voltage law).
The variable resistor scenario is more intuitive while thinking of Ohm's law.
Thanks for sharing your opinion
But brother how can I determine that which configuration I have to use ? For example last week we did in laboratory common source amplifier experiment.
Nicely explained
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Used in digital multimeters for tuning.
Thanks for sharing the knowledge 🙌
Good video, thanks a lot!
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Very informative video! Keep it up!👏
Thank you! Will do!
Can you explain to me how to select the value of potentiometer such that when I have a supply voltage of 9 volts, and I draw 50 milliamps of current, the voltage doesn't drop by more than 0.1 volt?
Indeed, selecting the appropriate potentiometer value can be a bit tricky. To answer your question, you'll need to calculate the resistance value of the potentiometer based on the voltage drop and current draw specifications. You can use Ohm's law (V = IR) to solve for the resistance value. Resistance value = 0.1 / 0.05 = 2 ohms. However, keep in mind that potentiometers have a limited power rating, so you should also make sure that the potentiometer can handle the current draw without overheating or exceeding its power rating.
for a 12vdc motor with a power source of 12vdc either Battey or adapter, what kilo omhs of pot should be used so it won't burn ❤️🔥.
Bisakah mengukur Potensio ohm pada rangkaian PCB Yang Sudah terpasang komponen lain lainnya ?
Of course! 👍 You can measure the potentiometer's resistance on a PCB even if other components are already installed. ⚡ Make sure your multimeter is set to ohm mode and connect the probes to the potentiometer's terminals. If possible, take the measurement while the circuit is powered off for more accurate results. 🔧📏 Hope this helps! 😊
So helpful thanks a lot
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Sorry for the stupid question: If the DC motor was wired up in the same way as the LED, wouldn't the effect be the same? I.E. That the potentiometer is controlling how much power the appliance is using?
In fact, that's a great question my friend. While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal.
For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
@@Automatedo Thanks for the answer, and for the excellent videos :)
We will appreciate it if you can introduce this channel to your friends and colleagues as well 🙏
Thank you brother
Hi this resistor reduce current
Or voltage?
How would this thing work on a lathe motor whereby you starve the motor of current, to slow the speed of the motor, then introduce, a heavy load to it. Will that burn the motor out in short order?
And how reliable are these units per-se, are they themselves prone to failing?
Thanks.
When it comes to controlling the speed of a motor, especially in applications like a lathe where heavy loads are involved, it is important to consider the motor's specifications and limitations. While a potentiometer-based voltage divider method can be used for speed control, it may not be the most suitable or reliable method for high-power applications like lathes.
In scenarios where you want to slow down the motor by starving it of current and then introduce a heavy load, it can lead to increased stress and strain on the motor. This can potentially result in overheating, reduced efficiency, and even motor failure if the motor is not designed to handle such loads.
For heavy-duty applications like lathes, it is recommended to use motor control techniques specifically designed for high-power and variable-speed operations. This typically involves using motor controllers, motor drivers, or specialized speed control systems that can handle the power and current requirements of the motor while providing better control and protection mechanisms.
Regarding the reliability of these control units, it depends on the quality of the components, the design of the circuit, and the operating conditions. While potentiometers themselves are generally reliable, other components in the control circuit, such as transistors or motor drivers, may be more prone to failure if not properly selected or protected.
Thanks, this is one of the best explanations I have found on the topic tonight. Still, I am not sure (pretty much being just dumb, unable to recollect my early school years) what the practical difference would be.
In my case, if I have a DC motor, will I be able to kill it completely (0 rpm) with a pot ... and if so, will the circuit still be draining the battery (the bat power being transferred to heat in the pot)? I know what I want is possible with a pot regulator board (or LM317?), but I was wondering if I can make it simpler. Does the pot resistance matter in erms of the voltage provided? Guess I need to do more homework. :D
Yes, it is possible to stop a DC motor completely (0 rpm) using a potentiometer (pot), but it will depend on the specific characteristics of the motor and the potentiometer used. If the potentiometer has a high enough resistance and power rating, it can be used to reduce the voltage supplied to the motor, which will slow it down until it stops completely.
Regarding the battery drain, if the motor is stopped completely, there should be no current flowing through it, so the circuit will not be draining the battery. However, if the potentiometer is dissipating power as heat, it will consume some power from the battery, which will be dissipated as heat in the potentiometer. This means that you need to ensure that the potentiometer has a high enough power rating to handle the power dissipation and avoid overheating.
Can i put potentiometer between the speaker and the dvd componant to increase or decrease volume of the speaker individually ,????
Plz help
Yes. To do this, you will need a potentiometer with the same resistance as the speaker. You can find the resistance of your speaker by looking at its specifications or by measuring it with a multimeter.
Once you have a potentiometer, you will need to connect it in series with the speaker. To do this, connect one end of the potentiometer to the positive terminal of the speaker and the other end of the potentiometer to the positive terminal of the DVD component. Connect the negative terminal of the speaker to the negative terminal of the DVD component.
Once the potentiometer is connected, you can adjust the volume of the speaker by turning the potentiometer knob. Turning the knob clockwise will increase the volume, and turning the knob counterclockwise will decrease the volume.
good explanation 🤩🤩
Glad you liked it 💮
Thanks,please next educational video.
We are glad to have such an audience like you. You can watch our other educational videos on our UA-cam channel and we will publish other videos periodically later😉
what's the difference the first digram and the second diagram?both gave out more current and less current,the motor also spin fast when received more current so does the light,
While a potentiometer with only two pins can be used for motor speed control, a potentiometer with three pins can offer additional flexibility for controlling other aspects of the motor control circuit, such as the direction of rotation or the duty cycle of a pulse width modulation (PWM) signal.
For example, in a motor control circuit that uses PWM to control the motor speed, the third pin of the potentiometer can be connected to the PWM input, allowing the potentiometer to control both the duty cycle and the speed of the motor.
🎯 Key Takeaways for quick navigation:
00:03 🧪 Potentiometer is a mechanically driven analog device used in electronics projects.
00:31 🔄 Potentiometer is a variable resistor that can easily change resistance by turning a knob.
01:01 🔌 Potentiometer has three terminals: two fixed and one variable, forming an arc of a circle.
01:30 🔗 The middle terminal (wiper) moves across resistive element, altering electrical contact.
01:58 🔍 Multimeter helps measure potentiometer resistance; wiper's position affects value.
02:27 🔧 Wiper position changes resistance; multimeter probes measure resistance accordingly.
03:21 💡 Potentiometer used as variable resistor for LED brightness control.
04:18 ⚙️ Potentiometer acts as voltage divider for motor speed control.
05:15 📚 Understanding the basic concepts of potentiometers for electronic projects.
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Lowbrow question
Controlling a LED. Input is 30v ... 1k pot with give me .03 increment of change (0-30volt amp)?
Bravo well done 👍
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Sunum çok iyidi ilk işim abone olmak oldu . Bilgilenmek istediğim motor bağlantısında sağa ve sola dönmesini nasıl gerçekleştireceğiz
Determine the specifications of the potentiometer and DC motor. Check the voltage and current ratings of both components to ensure they are compatible.
Connect the positive terminal of the DC motor to the positive terminal of the power source (e.g., battery or power supply).
Connect the negative terminal of the DC motor to the center terminal (wiper) of the potentiometer.
Connect one of the outer terminals of the potentiometer to the negative terminal of the power source.
Connect the other outer terminal of the potentiometer to the positive terminal of the power source.
Set the potentiometer to its mid-point position.
Turn on the power source and observe the motor's rotation direction. If the motor rotates in the opposite direction to what you desire, swap the connections of the motor's positive and negative terminals.
Rotate the potentiometer knob to control the motor speed and direction. Rotating the knob to the right will increase the voltage across the motor terminals, causing the motor to rotate in one direction, while rotating the knob to the left will decrease the voltage across the motor terminals, causing the motor to rotate in the opposite direction.
So how does a potentiometer with all 3 leads connected not short out? The only thing I can think is the wiper always remains neutral, allowing current to flow to neutral regardless of the potential applied.
When all three leads of a potentiometer are connected, it forms a voltage divider circuit where the wiper acts as a variable resistor. The resistance between the wiper and one end of the potentiometer will change as the wiper is moved, allowing for a variable voltage output.
To address your question, the wiper does not necessarily remain neutral. Rather, it adjusts its position along the resistive element of the potentiometer, which allows for a variable voltage output. This does not cause a short circuit because the resistive element has a high resistance value, which limits the current flow through the circuit. Therefore, even when all three leads are connected, the current flow across the potentiometer is limited by the resistance value of the element.
I hope this helps! Let me know if you have any further questions. 😉
@@Automatedo a ha! That makes perfect sense! Thank you for the answer!
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