HOW TO MAKE AN LED DIMMER
Вставка
- Опубліковано 15 жов 2024
- In this video we make an LED dimmer using a 555 timer and a potentiometer with diode steering to control the duty cycle and pulse width modulation.
www.pcbway.com/ Get 5 boards in about a week for $22!
Learnelectronics Merchandise:
Yes!! I now have merch: teespring.com/... Electronics themed T-Shirts!
----------------------------------------------------------------------------------------------------------------
HEY YOU ABOUT TO POST SOMETHING STUPID:
Yes, I know my hands are large/fat. It's because of a heart condition I suffer from called Congestive Heart Failure. Here's a link to some information about CHF: cle.clinic/2Td...
One of the symptoms is that it causes fluid retention, mostly in the hands, feet/ankles, and face..
--------------------------------------------------------------------------------------------------------------------
Amazon Store:
If you are shopping for electronic components, test gear or consumables please consider visiting my Amazon shop @ amazon.com/shop/learnelectronics
Please check out www.patreon.com/learnelectronics and pledge a dollar if you can. It will go a long way to keeping the channel alive. It costs a bit of money to buy all the items and produce these videos. Your help is appreciated.
---------------------------------------------------------------------------------------------------------------------
Donation:
Or....if you'd like to send a one-time donation you can use this link: paypal.me/learnelectronics
---------------------------------------------------------------------------------------------------------------------
Gear I use:
DMM: Owon B33+ - amzn.to/3qQgH20
Power Supply: Matrix 3206 - amzn.to/37C0fL9
Portable O'scope: YEAPOOK ADS1013D - amzn.to/2ZG4G3x
Bench O'Scope:Hantek DSO2D15
amzn.to/3ir307N
Soldering Station - KSGER T12 - amzn.to/2NuNdby
Multimeter leads: Probemaster - amzn.to/2ZJ0BLK
THIS IS THE GOOD STUFF!!
I truly appreciate the focus on traditional ANALOG circuitry. I cannot recall how many times I’ve been at the bench with similar project application decisions.More often than not, a simple circuit can be so much more practical than just throwing a microcontroller in the mix.Not to mention all the associated secondary requirements that come along with using tons of equipment.
Gotta love the good 'ol 555.
Chip of a thousand uses.
Man, I am doing a Halloween stuff and wanted a led dimmer circuit! Lo and behold you read my mind and did a video for me! Synchronisity right there
Nice circuit Paul. Thanks for sharing.
I do love videos with the 555 timer. Thanks, Paul.
A simple but very useful circuit! Brilliant!
I have a great paper back on various 555 circuits. Can't put my hands on it right now to give author publisher data, in the future I'll amend my comments but this little book is great! It serves up a wide variety of circuits along with short succient theory and operation info. Your video reminds me of one of the circuits I constructed. FYI I found it in a used books store in a bin of under$1,00 kinda there bin before trash or whatever they would do for disposal. I think along with some other books (Fredrick Pohl Gateway series wonderful novels) this book was a toss in the bag for a quarter, the 3 Pohl books came to $8.00 total receipt was $8.25 plus tax. What a deal. As always your videos work for me from different directions, thank you!
Love this type of content from you. I think it's your best. Useful circuits and component based content.
Could you elaborate more on how the diode section works? I'm having a bit of trouble visualizing what's going on with them and how exactly they are affecting the charging of the capacitor. Why wouldn't just a potentiometer be used to adjust the charge current supplied?
Pulse With Modulation. Nice job Paul.
Thanks! Enjoyed and learned!
Very cool....thanks, Paul!
Fantastic video. I love these videos.
Good demonstration, looking forward to what you do next.
Sweet project! Hail the 555!
Master ,
Good to learning near you
FR.
The ever awesome 555... I do love videos with the 555 timer. This thing has been doing stuff like this for years and who would have thought this little simple chip would be doing all these videos years later... :-)
Now I need to go and make one. I just found I need one... LOL
Hope you and the family are doing better... :-)
Thanks for the video, Paul!
LLAP
I did enjoy this video! Thanks for posting.
Looking forward to the follow up. I’d like to use this to control the brightness of about 20 meters of 12V LED strip which will get mounted under my stairs as illumination for the night.
i expect that this circuit can not handle the power needed for your project, lets say 30 leds per meter times 12 = 360 leds at 10 µAmps per led, for your own safety, better get a pre-made controller and a good smoke detector.
@@jyvben1520 no worries. I made such circuits before and I know what I’m doing. I studied electronics 10 years ago. And yes, I have smoke detectors which are part of my Smart Home so if there is smoke somewhere I will definitely get informed 😀
Thank you so much, sir.
I've always found the 555 timer, useful in many different applications. Hope you are doing well, Paul!
Do you know if its possible with a 555 to achieve a duty cycle low enough, even beyond that of a windshield wiper delay? i'm talking about a signal 1-2 seconds high, 1-2 minutes low. Ive tried different values using sub boxes but couldn't even get in the neighborhood. Theres a chip (LTC 6995) thats capable but its only available in a SOT-23 package. Thanks great channel
Great explanation. I learn a lot from you from circuits that I already know, you explain rhe why's and how's. That's why I like your videos, very instructive.
Note aside, your marker sound gave me creeps on my nerves 😁.
very cool content as usual!
hi, am a total newby in this electronics thing but im really loving it jaja, I already fixed CRT tv that was dead and found out the problem was in the secondary power suply, a shorted H.O.T and few cold joints in the flyback area. I WANT MORE.. im making this LEd tree, im using old fashioned DIP leds and are 73 in total connected in series of 4, 6 and 7 LED every serie is a branch of the tree. so my question is..
what altenative do I have to make a dimmer in this circuit fed wth 19 volts cause as far as i know NE 555 working voltage can´t exceed 18 volts¿
Thank sir for vid , this experience was one of my first in arduino's world
Great video Paul, can this be used with some way to limit max Vout? I have an LED driver with 12v 200ma supply for 0-10v dimming and I wouldn't want to send back 11 or 12v back in.
The voltage is fixed. We are only changing the mark-space ratio.
@@learnelectronics So as long as I regulate down to 10V first, this may work perfectly. Thanks again!
Great stuff, can't wait to see the motor pwm application, looking forward to use for fan speed control. Can you elaborate on the resistor selection so that I know what to use in a 12V system controlling a led strip that I would like to make dimmable. Thanks
What about using a LM7805 or LM340?
Would this work with a 12V input, dimming a 4W LED bulb? I'm trying to build a circuit to dim a 12VDC 4W bulb in a lamp that is battery powered.
Very Informative
How can I apply this to a more useful purpose such as dimming an LED house lamp?
Awesome bud ty.
You need a third circuit with an output transistor for higher loads
Great video, Paul. Thanks!
How about a series, including PWM servo & stepper driver/amps, too? Perhaps a programmable DAC input from arduino or PICO as the finale?
Yeah, I know that there are already commercially available servo driver boards for MCUs, but you're already 1/3 the way there, from scratch. Given the whole tamale, folks could build their own custom servo/stepper motor controllers from scratch, too. JS
That’s damn near the 555 Circuit I started yesterday. Unfortunately I have no Dip Style. I’ve been making my own footprint out of copper tape. It’s a stress relief for sure. I now know how surgeons feel... Kinda. 😂
Good job Paul
Thanks alot man I have learnt alot from you
I wish i could support your patreon but i'm living in Iran and sanctions dont allow me
could you get the circuit to have adjustable frequency as well as duty cycle. I could never make it work because one would always affect the other. I had to use an arduino instead.
Have you tried adding a diac to the circuit, to control the current limit?
I'm not sure if it's effect will produce the outcome of variable voltages or not but an LM7805 orLM340 should.
@@cndbrn7975 thank you I'll try it.
Would have been interesting if you would have showed the signal on pins 6 & to with respect to ground--and a bit more explanation about how the a-stable oscillator works.
Is it possible turning AC 18w led bulb to dimmable without any ripple
After two attempts to get this to work, I must ask what diodes are you using? Does it matter? I am using 1N4001. On my 'scope I just see noise at ~100KHz. LED goes on but no dimming.
I'm using Schottky diodes but it doesn't matter what type of diode. All diodes act as one way valves.
@@learnelectronics Thanks. I think I might have just had a wiring problem. Wire back from capacitor going to pin 3 instead of pin 2. I checked and rechecked the circuiit but kept missing this fact. I got it working now with the IN4001, Lesson learned! Keep up the good work and I'll be watching.
Ah the 555 the go to chip for just about any circumstance.
You did'nt say what diodes you used. I take it they were 1N00X series. ?
I was about to say that you could turn that into a motor controller until you mentioned it. lol
👏👏👏
I have made the same circuit but LED doesnt dim, only BLINK. I connected my scope and I am able to change duty cycle, so the circuit is correct. Can anybody explain why the LED blinks but not dim. Thanks fellas
Never mind, I replaced the cap for a smaller value and its working fine
Cool :)
Why is a 555 timer drawn like it is? Why dont they draw it out as the actual chip is configured? There aren't pins on the side of a 555 and in the diagrams they usually show them with pins.
@@Meganano my 555 timers are as i described
Can you kindly explain why that is different than how others show it in their schematics? Thanks
@luke B Im familiar with the 555 timer. The question that i started this thread with was "Why do schamtics show the pinout differently than the actual ne555 timer has its pins layed out?" No need to call names or call people wrong lol I didnt' even say anything in a matter-of-fact way so no need to call me wrong about something. Just asking a question and looking for an actual answer instead of showing me a pic i've seen a bunch of times. Thanks so much for your replies and I've given you way too much of my precious time.
@@Meganano No worries bro, yea wasn't trying to say he was wrong or anything. I'm still learning and have done a few 555 timer projects and just noticed that its literealy drawn differently in the schematics than how the chip itself is and its been throwing me off from making a steve ward style dual 555 timer circuit for my tesla coils. Just makes it xtra confusing and more intimidating to try to build lol Anyway take care man.
I see what happened there and its my fault for wording it like that. I edited it to be more clear.
I am Soooooo Sorry.