I am using this Triac circuit to control the brightness of several incandescent lights. The circuit monitors the phase of the 120 volt wall current, then signals an Arduino when the phase crossed zero. Based on this signal input, the Arduino switches the AC current which goes to the lights, limiting the amount of power that is feed to the lights. More info can be found here
I read that this circuit can not be use to switch LED lights. Why is this? I am assuming it's because the switching rate is around 60 herts, which will cause a visual flicker. If so, can I connect the MoC3052-M input to a PWM output? This should switch the AC current fast enough to create an effective dimming effect. Will I need to alter the circuit in order to do this effectively and safely?
Here are my options for powering the LED's:
1) bridge rectifier only, powering the LEDs with 120 volts DC. 2) Wall Plug transformer (wall wart) to power the LEDs with 12 volts DC.
If there is another option to convert 120v to 12v or 9v DC, one that will work well with this circuit, please let me know.
I plan to use this device for the switching:
The goal for this question is to find a way to use this device to dim an LED rope light (as well as the incandescent lights.)