This is the video that i wanted, the shop owner said that the other ics on other vids are sold out and only left this. Best Video! Now i can continue on my project.
The display will likely handle higher currents than the chip. For the SN7447 it has a maximum pin current of 40mA and the total chip can dissipate 320mW in normal operation circumstances.
first think circuit without resistor you switch slider and + connected - directly DOH! that we call short circuit resistor is pulldown input down when switch not used and pull it up when used bcoz there one resistor voltage become on that side is positive if use just + switch -> input. yeah it work perfectly on position, but when you switch off input not go anywhere pin is floating. it can be 0 or 1 we not know and we want it be 0 then. thats why resistor is there pull it down. hope helps xD
Hello, can you do the same exact circuit in this video using Proteus? I tried it but the 7447 bcd and 7 segment display are different om Proteus so it isn't working. Thank you in advance
You calculate resistor values for LEDs by assuming a typical LED current of 20mA (0.02A). You know the supply voltage (5V). So Ohms Law, Resistance = Voltage / Current. So Resistance is 5 / 0.02 which is 250 ohms,. Use the nearest standard value - so 220 ohms.
I want to display them using 7474 decoder But there is a problem When we use it the output gives don't cares after number 9 and We want to represent The rest of the hexadecimal number What can we do?
I have this hooked up to a 4x4 matrix keypad and a 74C922 keypad decoder that outputs BCD. Since I introduced the 7447 and the 7 segment display, it counts from 0 -9 perfectly, but goes a little crazy after that. What happens if you select a binary 1010 (A) on your dip switch? I would like to get an "A - F" out ???
Hi the most important consideration is the max current rating for each segment. Typically it's about 20mA for leds. For my setup, I used a 6v power supply (4 AA batteries) with 470 ohm resistors. If you use ohm's law, that comes out to ~ 12 mA of current.
It depends on the power source you use. For standard LEDs you want to limit its current to 20 mA do 470 ohm works well. And 1kohm is a good choice for pull up or pull down resistors.
Hi the thing around the switch is a pcb board. The pins of the switch were too short for the breadboard so I attached it to a pcb with male headers so that it would fit securely on the breadboard. The jumper wires are dupoint jumper wires and they come like that when you buy it.
Hi, not that I am aware of. If you wanted to build one you would have to map out all 256 values all 3 of the seven segment display outputs and use K-maps to derive the necessary combinational logic required. Or just use a microprocessor. Goodluck
Hey, why is the 6 not displayed properly??? in your experiment even I too tried on Tinkercad but not working for me either... I mean the 6 is not being displayed properly.
Using 8 switches: If you wanted to build one you would have to map out all 256 values of all 3 of the seven segment display outputs and use K-maps to derive the necessary combinational logic.
Hi you would have to connect the 4 inputs to a 4 input AND gate and use inverters as necessary for the number 6. Then connect the output of and gate to the digit a
I'm deeply appreciative to you!!! I searched videos of 7447 all day but I had never seen anyone perfect explanation like you.
This is the video that i wanted, the shop owner said that the other ics on other vids are sold out and only left this. Best Video! Now i can continue on my project.
The best video on driving a 7 segment display that I've seen. Great Job!
Very neatly done project. Noce video! Make more if this type of videos.
Can you show the common cathode display circuit and also schematic
On what basis did u chose the resistor values?
What is the minimum amount of current that can damage the 7 segment display?
The display will likely handle higher currents than the chip. For the SN7447 it has a maximum pin current of 40mA and the total chip can dissipate 320mW in normal operation circumstances.
Good Work ! clapping ...
Super clear the way you hooked everything up, thanks!
Thank u so much Man,best explanation.
Hi awesome video but I just want to know what the 1k resistors are for?
Hi I explained it somewhere in the comments below
first think circuit without resistor you switch slider and + connected - directly DOH!
that we call short circuit
resistor is pulldown input down when switch not used and pull it up when used bcoz there one resistor voltage become on that side is positive
if use just + switch -> input. yeah it work perfectly on position, but when you switch off input not go anywhere pin is floating. it can be 0 or 1 we not know and we want it be 0 then. thats why resistor is there pull it down. hope helps xD
Are the resistors 1/4 watts ??
Great video. Thank you.
Hello, can you do the same exact circuit in this video using Proteus? I tried it but the 7447 bcd and 7 segment display are different om Proteus so it isn't working.
Thank you in advance
Good work. Thanks
Dhanyawad 🙏
crystal clear.
I haven't found the dip switches anywhere on the market. Can I use 4 3-pin slider switches for inputs?
Yes
Thanks it works 👍
Very nice video
Fantastic ❤️
thank you very much. That is great
How about a sample wiring connection for PPE matrix
can you post a design of 4 input 7 segment decoder using diode-transistor logic ?
can i use decoder if i need to output somethings other than 0-9? or just can control manually using switch?
Can i use a 330 ohm resitor instead of 470 ohm resistor and not use the 1k resistor and use 5v supply
is it okay to use a 9V battery supply? also, will this display the no. 9?
Hi the 9v question is answered recently in the comments and yes it displays 0-9.
@@QRobotix thanks a lot!! great video, too!
Can I use 9 volt battery instead of 6 volt power supply
if I used different resistors will it work?
Which type of power supply we should use
why you connect two common together? is one common enough ?
Why are we using 470 ohm resistors for 7 segment i have also seen other videos they arent using it
Can you reupload the schematic? Your link isn't working
Is 74LS47 and 74HC47 IC still the same?
Yes!
Can u post the design of digital calculator?
How to calculate the value of the resistance ?
You calculate resistor values for LEDs by assuming a typical LED current of 20mA (0.02A). You know the supply voltage (5V). So Ohms Law, Resistance = Voltage / Current. So Resistance is 5 / 0.02 which is 250 ohms,. Use the nearest standard value - so 220 ohms.
Hi may I ask why is my display not changing . Like it's stock in number 8. Is it possible that the problem is in my switch?
and also it suppose to start with 0 right? hope you can help me
@@yoshkyu1134 brother I am currently in the same situation, can you please give me any suggestion on how to make it work ?
Can I connect common anode through a 470 r resistor to 5v insted of connecting cathode of all segments with 470r resistor
Yup as long as your current output is < 20mA for each segment
Good point, other tutorials show with the one resistor. Helps to save space on the breadboard.
@@QRobotix bro can I take 8 way deep switch or can I make without using switch please reply fast
Please can you tell me how to represent A B C D E in the 7 segment display?
If you want to use logic gates then you have to use the Kmap method to design the logic
I want to display them using 7474 decoder
But there is a problem
When we use it the output gives don't cares after number 9 and We want to represent The rest of the hexadecimal number
What can we do?
Love u man.Is really helpful
Someone's playing Mobile Legends at 0:13 hahahaha lol
can I use this with a 3x4 keypad?
Sir which IC should be used in this circuit , is it 74HC47 OR 74LS47
either will work
Why when you ON the pin 04 on Dip Switch it displays 1 on segment?
Hey, how would I do this with 3 7 segment display decoders?
What do you mean?
What type of jumpers wires are used??
Can you please show it in schematic
will it work with a 7 volt battery?
Hey I have a dip switch that has 5 switch, will it work tho if I use only 4 switch and leave the 5?
Yes
What if you want to start it in to 4 not 0?
Super
How to connect 7 segment display using 74147 chip and 7447 chip can u do it please...
Hey !!!! Could u add a buzzer and LED ?
Any advice on how to do hex to 7 segment display decoding?
Where is the hex input coming from?
The circuit is not available using that link. It is showing some error
Hi, i follow your instruction, but why ic 7447 doesnt work? Shoud i replace the resistor?
🤷♂️
Thanks
Agr hum ne sirf 5 tk display krwana ho mtlb 0 to 5 to kesy ho ga?
I have this hooked up to a 4x4 matrix keypad and a 74C922 keypad decoder that outputs BCD. Since I introduced the 7447 and the 7 segment display, it counts from 0 -9 perfectly, but goes a little crazy after that. What happens if you select a binary 1010 (A) on your dip switch? I would like to get an "A - F" out ???
Hi no it does not display Hex after 9
Can I use less than 470 ohm resistor?
What type of battery is used here and can we replace it with some other battery
Hi the most important consideration is the max current rating for each segment. Typically it's about 20mA for leds. For my setup, I used a 6v power supply (4 AA batteries) with 470 ohm resistors. If you use ohm's law, that comes out to ~ 12 mA of current.
@@QRobotix thanks
I did everything like in dmthe video, but it shows only the middle line (minus)
Is there a binary coded hexadecimal decoder ic?
Friend please explain why do you add particular resistor value and I need basic things about electronics do you help me
Hi which resistors?
do you have a schematic diagram?
Can you use 9v batt here?
how to connect this in proteus by decoder and the distribution of numbers ?
Hi! The datasheet and schematic cant be opened anymore, it says error 404
Is there any change if I use 74LS47 instead of the using 74HC47?
Compare the data sheets between the two to see if the pinouts are similar
me salvaste grasias
the input voltage is how many volts???
It can be from 5 to 15 v
Can you post the design of this circuit
Hi schematics can be found in the description field.
@@QRobotix please reply
@@26avishkarbhoir85 hi it's in the description
Why did you use 1k ohm and 470ohm only??
It depends on the power source you use. For standard LEDs you want to limit its current to 20 mA do 470 ohm works well. And 1kohm is a good choice for pull up or pull down resistors.
would please show the how to use two 7 segment display to get output 15 , in binary 1111
what is that thing around the switch and those black thing in the jumper wires?
Hi the thing around the switch is a pcb board. The pins of the switch were too short for the breadboard so I attached it to a pcb with male headers so that it would fit securely on the breadboard. The jumper wires are dupoint jumper wires and they come like that when you buy it.
Hi
Is it possible to have similar, but for 8 dip switches to 256 addresses?
Hi, not that I am aware of. If you wanted to build one you would have to map out all 256 values all 3 of the seven segment display outputs and use K-maps to derive the necessary combinational logic required. Or just use a microprocessor. Goodluck
Hi my 7447 bcd has only 15 pin? is it okay?
how i can make 7 segment led display 0 where switch is over 9 like (8+2 = 0 or 8+4 =0 or 1+2+4+8 = 0 ) any thing over 9 let 7segment show zero
What is that supply material u given? Cn anyone tell me
the outputs are only 0-9?
not 0-F?
I’m using a Cd4055 decoder I’m so confused on how to connect it to the 7 segment display
Have you looked at the datasheet? CD4055B has similar pin assignments to the 7447.
Its battery is 6v and what ampere?
Hey bro can you tell me how to make two digits seven segment display from 00 to 15 only
Yeah it can be done using logic gates. I ll make a video on it once I have some time. Really busy with school at the moment.
Hey, why is the 6 not displayed properly??? in your experiment even I too tried on Tinkercad but not working for me either... I mean the 6 is not being displayed properly.
What is it displaying?
It is showing 6 without that segment naming 'a'...
Is it okay to use common cathode 7seg for this?
Yes!... BUT you need 74LS48... The display you're talking about won't work with 74LS47
You the best man🫡 works properly
can a 9v battery as a power source can be used to ligth the led?
i tried it and it did not work as it should.
Try using a higher value resistor if you want to use a 9v battery
@@QRobotixhigher values for both the resistors of 1k ohm one and 470 ohm one??
Can i please get the logic diagram of this?
can i use decoder for common anode 7 segment?
Yes I am using a common anode display in this tutorial
how can we connect common cathode?
can you use a 9v battery as its power supply?
Yes you can. Just make sure you choose an appropriate current limiting resistor for your display segments
sir can i use 9 volt battery instead
Check the datasheet for the max voltage for the chip. You can use the 9v for the 7 segment display as long as you limit the current to < 20 ma
is it ok if i use common cathode.?
Yes just make sure to connect the cathode to ground and not VCC
How to display 8-bit binary number using seven segment display?
Using 8 switches: If you wanted to build one you would have to map out all 256 values of all 3 of the seven segment display outputs and use K-maps to derive the necessary combinational logic.
Battery voltage?
help me on it,
for display 6 I need this orientation (abcdefg=10111111) but we get (abcdefg=00111111), how can we get required bit orientations
Hi you would have to connect the 4 inputs to a 4 input AND gate and use inverters as necessary for the number 6. Then connect the output of and gate to the digit a
How much volt your battery is ?
6 volts
How much it coast for all please reply I take this project
Should be less than 20 dollars
@@QRobotix can I take any type of 7447 ic please reply
@@26avishkarbhoir85 Should be. Double check the datasheet for the pinouts
@@QRobotix can you tell me exactly which 7447 ic nedded I have to submit the project in 2 days
@@26avishkarbhoir85 yeah it's the 74HC47
Where do you place the 470 k ohm resistor
which part of the video?
74 47 chip
it goes to the 7 segment display
Okay
We can use 40 17 ic to this
what if i use 12k ohm resistor instead of 1k ohm resistor?
There will be no problem if you use them with the dip switch...
How much does it cost to make the project
It depends on what materials you have already. I would say fairly cheap ~ 20 USD
@@QRobotix thank you