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 ...

In some cases the LED lamp has been taken out of its box and installed in a room with a dimmer switch only to discover ... during the portion of the AC line half cycle before the triac fires. The ...

They switch faster ... is an optocoupler which isolates your control circuit from the mains power that you are controlling. Second, a triac, silicon controlled rectifier, or MOSFET that switches ...

Alternating current (ac) or direct current (dc) circuits are capable of carrying very different currents, as illustrated by the ratings on the switch in Figure 1. This is why it’s so important ...

Power relays are specifically designed to handle either AC or DC. It’s important to know the fundamental differences between them before building them into a system. Introduction to AC and DC ...