AC light dimmer with 2x TRIAC

[rvendrame]

@jacikaas said:

When I turn it on, bulb also graceful goes to 100%, but when max power had been reached - power instantly goes to 0% and in Domoticz status leaves as ON.
But if I use slipper to set 100% - dim level leaves and light bulb is shining as 100%.

I saw you still using 'static int' instead 'volatile int' for currentLevel . Did you try 'volatile int' ?

Apart from that, I don't see any other reason for that. Perhaps something into controller side (domoticz)? I use Vera Lite with similar arduino circuit as yours, and I never had this behavior in my setup.

[Zeph]

If I understand, sometimes when you think you should be seeing 100%, the light is actually off?

You are counting on the triac to latch and hold until the next Zero Crossing. However a triac needs a certain level of current in order to latch. If you try to trigger it too early in the AC cycle (while the AC voltage is still close to zero, just starting to rise), the load may not provide enough current to latch the triac. This is especially true with some kinds of loads. For example, LED Xmas lisghts don't conduct until the AC instantaneous voltage rises above the combined Vfwd of 25-50 series LEDs.

One way to test this hypothesis is to lengthen the pulse. Or you could adjust your timing multiplier.

[jemish]

Can we control AC fan using this module???

[Oitzu]

@jemish which module do you mean exactly?
The schematic in the first post is not suitable for inductive loads.

[jemish]

@Oitzu okk my friend, thank you so much.

But is there any design available for controlling inductive load???

[Oitzu]

@jemish maybe have a look at following blog-post: http://www.homemade-circuits.com/2012/04/how-to-use-triacs-for-inductive-loads.html
With this information you should be able to "improve" above schematic to be also able to handle inductive loads.

If you have no clue about all that... maybe have a look at this module:
https://www.kemo-electronic.de/en/Light-Sound/Effects/Modules/M028-Power-control-110-240-V-AC-2600-VA.php
It can control AC Motors,
in combination with this module:
https://www.kemo-electronic.de/en/Transformer-Dimmer/Converter/M150-DC-pulse-converter.php
You can connect it safely to the arduino.

[ahmedadelhosni]

@Oitzu i cant find the price of them on the site. Are they listed ?

[Oitzu]

@ahmedadelhosni
http://www.ebay.com/itm/KEMO-M028-Power-control-110-240-V-AC-2600-VA-Made-in-Germany-/251096815198
as example..they are relativ expensive.. see it more as an example. :)

[ahmedadelhosni]

@Oitzu assume that I didn't ask you :) :)

[rsaeful]

@jacikaas did you solve the issued? any luck i also have same problem event now i migrated to mysensors v 2.