ESP8266 Community Forum

- Wed Jul 06, 2016 1:29 am #50277 I was successful dimming a bulb using normal zero cross detection for single bulb. My ultimate goal is to perform dimming on multiple loads. So to do it I have to use the logic of timers. But it seems that this logic for multiple load is not working properly.
Can anyone help me out!!!

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- Wed Jul 06, 2016 9:49 am #50301 I really don't think that you can queeze more that one phase detection and ZCD from ESP8266. Even so it's to the limit if you want to run more than that on it.
The solution is to use a AC dimmer that has onboard Phase detection/ZCD.

This one: MPDMv4 - Universal AC MAINS Dimmer Module , was designed exactly for such applications where you don't have plenty of resources on your application MCU (ESP8266 in your case)

Related post : http://www.esp8266.com/viewtopic.php?f=13&t=10331

Also you have a short tutorials here:
- ESPBASIC example : http://www.esp8266.com/viewtopic.php?f=15&t=10630
- ESPBASIC simple interface example : https://www.youtube.com/watch?v=zVGn8s5BxM0
- Arduino example : https://www.youtube.com/watch?v=XftPnCJIU_0
- Blynk example : https://www.youtube.com/watch?v=sa2Io4sPK9k

ESP8266 MPDMv4 AC MAINS Dimmer Home: http://esp8266-projects.com/2016/04/mpdmv4-mains-dimmerswitch-html/
Available on Tindie: https://www.tindie.com/products/nEXT_EVO1/universal-ac-mains-dimmer-mpdmv41/

- Wed Jul 06, 2016 4:14 pm #50322

I was successful dimming a bulb using normal zero cross detection for single bulb. My ultimate goal is to perform dimming on multiple loads. So to do it I have to use the logic of timers. But it seems that this logic for multiple load is not working properly.
Can anyone help me out!!!

Hi, I'm not quite sure how you are going about this but once you know the zero crossing point it is the same for all the outputs you want to dim (unless you are using 3 phase in which case you still know the zero crossing point, it’s just a third of a phase different). The only bit you need to sort is the timing to set the outputs high after the zero cross point. It shouldn’t be a problem to dim a channel on each spare GPIO.

- Fri Jul 08, 2016 4:06 am #50384 I am working on same thing with same issues.
Light bulb doesn't dim properly when using Ticker timer in ES8266
If someone can look at our code provided by Aditya and suggest any improvements.