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Arduino Relay Basics - How It Works and How to Use It

Hi, I'm Bill. I'm a software developer with a passion for making and electronics. I do a lot of things and here is where I ...
EDN

Control a Relay with Arduino – Tutorial #5

In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one 6V or 12V relay, one 1N4007 diode and a 12V fan ...
EDN

Modbus RTU Relay Module

Welcome to my quick review of an inexpensive 2-channel 5V relay module controlled via RS485 bus utilizing Modbus RTU protocol. As claimed by some online sellers, this easy-to-get Modbus RTU 2-Channel ...
Electronics Weekly

Updated: ‘Safe’ all-npn reversing motor drive for Arduino

A teacher I know is stuck, with only npn transistors in the supply cupboard and the need to create a reversible motor drive for an Arduino project. Reversing ‘bridges’ have four switches (relay ...
Hackaday

Arduino Astronomic Clock Automates Lights

[Paulo’s] garden lights are probably a bit more accurately automated than anyone else’s on the block, because they use latitude and longitude clock to decide when to flip the switch. [Ed Note from the ...