ESP8266 Community Forum

- Mon Mar 02, 2015 8:21 am #11089

That does indeed look good.

One possible solution for your request : http://esp8266-projects.blogspot.com/20 ... mains.html

For any questions please feel free to contact me.

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/

- Mon Mar 02, 2015 9:30 am #11092 I got one more "advantage of relay" point:
Sometimes SSRs fails to turn off (https://www.ia.omron.com/support/faq/an ... index.html)
This can happend for a number of reasons, but i've noticed it happend if the SSR and the load are greatly unbalanced.
(In my case a 25A SSR driving a 40W light bulb)

- Tue Mar 03, 2015 7:26 am #11159 Here is one project i made to control AC lamp with ESP module. I modified an AC motion sensor.

added optocoupler to trigger triac

fed sensor output to esp module.

hardware set up done. will change to esp-07 after fw ok to fit in esp to black box.

here is my simple html page:


additional new features:
enable/disable motion sensing
enable motion sensing on set time
on off lamp on set time
manual control on lamp
Time is taken from ntp server

here is the test video.
https://www.youtube.com/watch?v=Ydcprt9MzR0


still need to finish the time settings.

- Tue Mar 03, 2015 8:03 am #11162

I got one more "advantage of relay" point:
Sometimes SSRs fails to turn off (https://www.ia.omron.com/support/faq/an ... index.html)
This can happend for a number of reasons, but i've noticed it happend if the SSR and the load are greatly unbalanced.
(In my case a 25A SSR driving a 40W light bulb)

Misfire in case of SSR it's a different story.

And yes, might happen, and yes, can be avoided, depending on your setup and the type of load, resistive, inductive or mixed. In the real world it's a place for every choice available: Triac, SSR, Power Thyristor, Relay, Manual switch, etc.

It really depends on what specific application you want to use them. For MAINS power switching mostly used solutions today are Solid State based ones.

If somebody want to use a relay...of course can be used.
But WHY?

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/