This post is in response to a reader who asked about detecting mains electricity using a microcontroller. The easiest and safest way to detect mains electricity using a microcontroller is with an ...

Code in the Arduino sketch is then used to compute the actual voltage being measured. The analog sensor on the Arduino board senses the voltage on the analog pin and converts it into a digital format ...

You’ve obviously heard of the Arduino boards and ... and you’ll start using the sensor. Almost every variant must have at least three pins, each for 5 volts, ground and signal respectively.

This typically includes resistors, push buttons, and sensors ... volts (for UNO boards). In addition to the board and components, it's important to get your hands on some tools for your Arduino ...

An Arduino can be used to test the life of any battery with less than 5 volts, Boxall says ... but also includes a sensor to see a car approaching the one-lane road, which switches the light ...

It’s an easy to build high voltage power supply that interfaces with an Arduino. After harvesting a flyback from the power board of a CRT, [Andrew Moser] added a new primary coil to the transformer.