The electronic power control circuits are designed to control the distribution or levels of AC or DC power sources ... directional electronic switch’, which can conduct current in either direction ...

A common theme in modern consumer electronics is having a power button that can be tapped to turn the device on, but needs to be held down when it’s time to shut it off. [R. Jayapal] had noticed ...

From time to time I get requests to make some high power switching ... ac light dimmer module with zero-crossing detector described here is ideal for microcontroller-based ac voltage controlling ...

On that board he found a variable resistor combined with a capacitor which control a triac, actuating the speed of a drill. [Ben’s] solution works great and isolates the drill from the control ...

Because they draw relatively little current from the ac line, they are fundamentally incompatible with triac-based dimmers.) The triac is the switching element in the accompanying dimmer circuit.