The problem with dimming AC LED Light Bulbs || DIY Trailing Edge Dimmer

I really appreciate your hard work and dedication to serve your knowledge with rest parts of your country.
Dear I'm struggling with research of reliable AC dimmers. How can I use these both pcb with esp32 + alexa/Google Assistant? Please reply if you're reading my comment.

If I'm reading the FL5150 datasheet correctly, it has a built in 5V linear regulator that is used between pin 3 & 4 to select TE vs LE dimming. I wonder if that regulator could power a small microcontroller like an Raspberry Pico? The FL5150 can be controlled with a 0-10V signal, which again I'm assuming we can pull off the VS pin connected to the 17V shunt regulator. All this means we can control this over WiFi

can we get an updated link for the resistor and capcitor kits pls

The 5150 data sheet says you can control the circuit with an external 0-5 volt signal referenced to ground, but the ground connection on the 5150 is connected to the point where the MOSFETS join, which looks like mains voltage. Can you make sense of this? The company's customer service rep seems not to understand my concern. Perhaps there is no problem, but I don't want to blow one up just to prove I was right.

Lol. “Hang on babe let me dim the lights”. Busts out a tiny screwdriver and proceeds to take off the switch cover and turn those tiny adjusting screws for 5 mins ….

I built some dimming circuits following the ideas in here, it all works but getting it certified to install in an actual house is a different matter.
I ended up building a low voltage control module to work with a certified 0-10v dimmer such as Finder 15.11

Hey Scott, I rebuilt your circuit and have good results till I start to dim at 30% brightness then the led lamp starts to flicker. I have a dimmable led light though. Any idea how to improve this? What led brand/model you recommend that doesn't flicker at low brightness levels?

can replace the analog potentiometer with an Arduino.

Hi,

We bought a house and these lights were half connected but when I measure this led transformator it says that both pins of the 12v are connected to each other... Is this normal?

Hi scott I have a non dimmable led pendant light and would like to change the existing driver model:
30-50w
input AC 85-265V 50/60Hz +- 15amps
Output DC 108-160V 240ma =-5%
Ta 45C-Tc70C

to a dimmable one. Is this doable? if yes, I need to know where to get this

You are a beautiful mind! 🤘🏼
Is it possible to buy a smart dimmer that can have smart bulbs attached to it that will not cause flicker in let’s say a multi bulb chandelier?

WOW - thanks for including normal mortals who can follow along - this used to be what is the word - pretty esoteric to say the least. Dedicated hobbyists only - and we never got cutting edge circuits - unlike Wozniak in the day (whose dad was an HP engineer.)
So for most of us, we are looking how to spec an inexpensive effective dimmer, and not in parts for the hobbyist, so that we can quickly solve the issue and move on, unfortunately - time being limited. Now at least I can interpret dimmer schematics.

very very good

Another great video Scott. This was an enjoyable watch. Thank you for showing a commercial version and your version.

What is the store where you bought MOSFETs?

Fan-bloomin-tastic!
Recently discovered no more halogen bulbs and learned "dimmable" LED's useless with our dimmers.
UK government/green-lobby/retailers didn't mention it. Leaving citizens to discover problem and replace dimmers costing 2-4 times price & disposing of old. Classic green-lobby mob-handed profiteering along with broken-wind-turbans... Unclear Power 😐

is there a way to make this work with a touch dimmer module? I have been looking for a dimmer switch with a low, medium, high, and off, when you touch the lamp housing but the majority of the switches, don't support led bulbs or only support 40w, I'm looking at installing 60w.

This video answering my big question of RobotDyn AC dimmer stay flickering when setted up power in 5%. Thanks!

you go to so much effort in your videos, extremely professional and educational

I need to make a dimmer for a 50-meter string light that consists of 50 8w led bulbs, powered off mains.
Does anyone have any suggestions on how to dim that load (400w)?

how to connect via bluetooth ?

i always get to learn many things from your channel!!

Love your videos.. but all examples show how to REPLACE an existing dimmer.. I can't replace mine.. what's the best way to convert from anti parallel scr to pwm?

What if you can't change the triac dimmer and your input is 24VAC? Would this IC work?

Can this code directly work on Arduino Uno?

I have designed the dimmer board..but after doing connection with my dimmer board bulb gets flickering..and at 0% the bulb shows little bit light in it..what is the problem can you help me

Now you need it with wifi control for Home Assistant and touch pad control because turning potentiometers is so 1990s!

Hi Scott, Just to clarify I would be using your squair boartd with FL5150 chip
Thanks you kindly Kazem

Hi Scott, Thank you so much for such a great video. I need to build a 12-volt ac version where AC input to the board would be 12-volts for dimming 12 volts LED's I will be using a microcontroller as well. How can I modify your 120-volt version components to work with 12-volts ac Thanks again Kazem

High scott tks for your explanation regarding your project. I bought one module SCR voltage regulator from internet and I will try to use it as a dimmer for LED lamp. Is it work or not. Need your help.

Great project ! I just ordered the PCBs. Any idea what's the max power could be driven ? I have a 40W LED lamp. It is fine ?

can attiny85 alternative other ic tell

The solution for some not dimmable LED bulbs would be a variac!

Very nice little ic for that use! How exactly does the Mosfet output stage not short to "ground"? The hit terminal would be shorted to ground every time the get turned on, right?

Great Video, as usual Scott is a pro. Can you please tell me why you have 2 series potentiometers on the last design?

Interesting !! as usual . What about inductive loads like an AC FAN ? it would be Humming ?

i always wait for his last moment expression " and i wiiiiill seeeee youuu next timmmme " ... your videos are such a help, though a bit advanced to understand.

Hi, nice video.
Used a standard triac to dimm one 5W LED spot, never had issues with hold current.

How does a dimmer circuit like this work with a non sinusoidal ac waveform? For example a square wave, or a "modified sinus wave" that some inverters uses. Would the triac activate at the zerocross region even if the change is nearly instantaneous? Just wondering for learning purposes only :)

GreatScott! please why is OCR0B value between 3 and 70 (0.384ms - 8.96ms). Thanks in advance

I know this is stupid but some LED lights support both AC and DC so is it possible to control DC voltages to dim the LED

I have a question: Why are these trailing edge dimmers more silent? The noise is coming from the large magnetic field generated by fast changing currents. With trailing edge current is also fast changing so the magnetic field will also be large but in opposite direction. Why is the noise gone?

Hello friends. can someone make and send the hex file of this software to me? or attiny 85 how many mhz will we program. Thanks.

Hi Great Scott! (Yes, I decided to include Great, because your knowledge and understanding of this subject matter is Great (with a capital G) when compared to mine)
So... Love your video, the FL5150 variant is exactly what I need, I just need a few minor adjustments, so I can actually use it on a daily basis. So I found your instructable, opened it in the EasyEDA editor and found I cannot change anything..... The changes I need to make: change R2 into a pot (like R1 in the ATTiny variant) and create a different PCB-layout (so I can mount it in my wall socket).
How can I make these changes to your design? Would love you to enable me to stay creative on this one ;0)

Thanks alot. Super work, I failed many times and finally got it done after this video. I still dont understand why there are 2 MOSFET?? will it work with one?
thank you

Awesome video! Thanks for sharing.
EasyEDA links don't seem to work anymore. Any chance you could update?

Excellent video! Thank you for share.
I would like to know if you still using the IRF840 on the las PCB with de FL5150?