By far the best universal dimmer!
For Universal AC MAINS Dimmer - MPDMv4.1
I was looking hard for a solution to digitally (=PWM) dim my high-voltage lamps, tried out a few solutions, paid far more for so called ready-to-use products but wasn't satisfied at all.
The two MPDM boards I got convinced me of the thought-out design - PCB is well layouted, mains are very well separated from the low-voltage part.
I connected them to Sonoff devices - having an ESP8266 inside - and drive them via its PWM channels.
Result looks like this: https://imgur.com/a/xhkar
Working like a charm!
The only thing to consider is, to not reach the maximum PWM / voltage input level, otherwise lights start flickering and some other undefined things might happen.
For the ESP that's a value around ~910 (of 1024) - between that and 0 everything is working perfectly fine.
EDIT: I almost forgot to mention the awesome support from the developer/seller. That was very helpful, communication was very friendly and faster than expected (meaning, he had to wait for my replies instead of me waiting for him :))
Response from NextEVO | June 22, 2017
Thank you all for your reviews!
I am very happy to see people using them with great success for their own experiments and projects!
Just a short tech note: As long as the MPDMv4 voltage control (VCNT) is kept inside the defined dimming interval (0-2.85/2.9V) is will work very smooth. Actually this is the only thing to take care about because as you can see on osciloscope waveforms presented in the related Youtube tutorials as soon as VCNT voltage is Out of the dimming interval the ZCD module will loose MAINS sync and things will start looking bad. This is something that is not related only with MPDMv4 AC dimmer, any AC dimmer if loosing MAINS sync will start working erroneously.
Happy breadboarding,
TJ.
