LED Strobe Light Circuit with NE555 Tutorial
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- Опубліковано 12 лют 2019
- Hi, today we see how a Strobe Light works.
For this project I decided to use the famous NE555 IC..
The basic operation of the circuit is: The 555 timer IC works as an astable multivibrator and generates a frequency, the square wave output drives the three LEDs. The flashing frequency is adjust by a 47uF electrolytic capacitor and a 10K potentiometer is used to adjust the *Duty Cycle. The output signal from 555 is brought directly to the LEDs, which must be connected in parallel, each with its own resistance. Another very important feature is the maximum output current of the NE555 (200mA) this makes us understand that we can add more than three LEDs, because each LED absorbs about 20mA.. but do not put more than 10 LEDs otherwise you risk to damaging the NE555 IC.
* What is Duty Cycle in NE555 timer?
A duty cycle or power cycle is the fraction of one period in which a signal or system is active. Duty cycle is commonly expressed as a percentage or a ratio.
The mark to space ratio of a square wave or pulse oscillator is often referred to as the Duty Cycle. This is a more useful term when the purpose of an output wave is to drive some device such as a motor. Changing the duty cycle changes the average DC voltage or DC current level of the output, and hence the power supplied to control the speed of the motor. This is also important in driving output devices such as lamps, heaters and many others. The Duty Cycle is a term that describes the percentage of each cycle taken up by the active or high period.
■ Components:
- 1x NE555 Timer IC
- 3x White LEDs
- 1x Red LED
- 3x 330 Resestors
- 2x 1K Resistors
- 1x 100 Resistor
- 1x 10K Trimmer/Potentiometer
- 1x 1N4148 Diode
- 1x 47uF@25V Electrolytic Capacitor
- 1x 10nF Polyester Capacitor
- Power at 9V DC
- Current consumption: 50mAh
- Electric diagram at 3:00
- NE555 Datasheet: www.ti.com/product/NE555
■ Do you want to Make a PCB?
Look this: • Vu-Meter 20 LEDs LM391...
► My Electronics Creations: goo.gl/k1PN4A
► More videos: / stefano91ste
WARNING: The following video contains flashing lights imagery that may cause discomfort and/or seizures for those have photosensitive epilepsy.
WARNING: This video is only for demonstration. I don't take any responsibility for damage to things, people and animals.
#ElectronicProjects #NE555 #StrobeLight - Наука та технологія
i love how you put power indicator leds in every circuit..
i love leds :D
your circuit is excellent. this is what i am looking for a year on youtube. i love it! I subscribed because of this work. Good job!
Hello :) Thanks for appreciating my work on youtube!
Very well illustrated. Just what I’ve been looking for. Thank you.
Thank you:)
Muchas gracias por el circuito, tu tiempo y conocimientos.
Gracias :)
Thank you!
Good , bro, already like and subscribe to your channel.👍👍👍👍👍👍👍👍
Ótimo circuito 👍😁👍
Gracias =)
Nice
Thank you :)
What assembly do you use to drive 7 sst uv leds in series with the maximum current in a les of 1.5A and 3.63 v
What capacitor size would I need to make this flash once a second? Great tutorial.
Hi, a 10uF electrolytic capacitor and a 10nF capacitor are the ones I would use.. so i did with a 1Hz generator with NE555
👍👍👍👍
can i use 100nF = 0.1uF polyester capacitor as alternative or what is your recommend to use as alternative? thank you for response
Hi, to obtain the same lighting effect of my video it is important to respect the values of the scheme I have provided
Hey Stefano, I've seen people connecting 1W LEDs to a NE555 timer but that LED has forward current about 350mA. How is that possible?
Hi, Surely they will have added a power transistor between the NE555 and the 1W LED. The maximum output current of a NE555 is 200mA
It's done by using a transistor (bc547 or equivalent) as a switch/relay, controlled by the output of the 555
👍
Thank you!
I have 10W high powered LED that forward current is 1000mA. Does that mean i can't use it for this project?
No, as I explain in the video at 1:30 the maximum output current of the NE555 is 200mA.. To do what you ask you should modify the circuit by adding transistors capable of driving those LEDs
What a great tutorial. Would this work to control a solenoid at the same speeds?
Thank you! - No, if the solenoid would require more than 200mAh (maximum capacity of the NE555)
@@Stefano91ste That's so helpful thanks :) Nowing what circuit will work is proving impossible, I'll have to have one made somehow?
@@Stefano91ste Shouldn't this be able to switch a transistor that would be capable of turning on and off a solenoid? Just replace the LEDs in the circuit with a transistor?
Yes, but only if the solenoid does not require more than 200mA - the NE555 on PIN 3 (output) cannot provide more than 200mA =)
@@Stefano91ste thanks bro, it was all to complex for my brain so had an all in one circuit designed and made. Cheers, I learnt enough to know the design would work.
Is it possible to have a frequency around 350/minute?
Yes if the circuit produces a frequency of 350 Hz
Great channel, lets support each other
Thank you so much!
Comments like this make me very happy and motivate me to keep doing a great work :)
Hi, how it looks in gerber?
Hi, here the gerber: ua-cam.com/video/bLIQpO9HIkY/v-deo.html
@@Stefano91ste thank you, I really aperciate your work, keep it up :)
how to make the LEDs blink twice a second???
Hi, you should use a NE555 set to generate a frequency of 2Hz, in the past I have made videos about it.
ugh if i only knew howto replace that pot with a resistor or two... :(
Thanks for the video tho!
Hi. if you want you can replace it with a resistor, but you will no longer be able to adjust the frequency of the flashing
Is it astable or monostable? Thanks for the answer
Hi, is an astable multivibrator, I explained it in the video at 0:48 and in the description :)
How to get the time delay of this circuit? or time of led every flashing in every second Thank you ☺️
You mean the flashing frequency of the LEDs? the only way to get an accurate measurement is to measure the output of the ne555 with an oscilloscope