Back on the subject of triacs, can anyone provide a diagram of how to hook up a microcontroller like an Arduino to drive a triac, with phase control being the object?
I've got the zero cross detect working, but all the examples I of microcontroller phase find are using optocouplers and mains voltage. This application note seems to provide an example of a direct connection, but leaves out basic information like whether the gate is driven high or low to activate the triac, where the load should go, and whether there must be (or can be) any connection between the µC ground and the AC line.
