The easiest and safest way to detect mains electricity using a microcontroller is with an optocoupler as it allows us to send data between two galvanically isolated circuits ... It uses a dedicated ...

This compact mains voltage sensor is intended to monitor and signal to another circuit, for instance a microcontroller, about the presence and/or absence of the ac mains voltage. For this task, a ...

You can see the circuits in the video below. A contactless probe picks up the changing magnetic field around an unshielded wire with an AC voltage on it. Current doesn’t have to be flowing since ...

Imagine you have two circuits, each carrying the same current—one is an ac circuit and the other is a dc circuit. When you switch off power to an ac circuit, a voltage spark (or arc) is created ...