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 ...

Below given is Relay Driver Circuit to build your own Relay module: Circuit Diagram and Working: In this Arduino Relay Control Circuit we have used Arduino to control the relay via a BC547 transistor.

A relay is a electrically-controlled mechanical switch. It can control much more voltage and current than an Arduino pin (or the transistor included in your kit) can. If you want to use the Arduino to ...

Besides we are using 12v relay in this project. Vin pin of Arduino cannot easily supply this much current for both relay. Hence transistors are used to conduct current from Vin pin of Arduino to relay ...

connecting Transistor Emitter to Relay and Base to Arduino Pin 2 and Collector to 5V in Arduino . connecting Push Button to Pin 8 in Arduino and Terminal 1a to GNR and Terminal 2a to 5V in Arduino .

At the most an Arduino output pin can supply 40 milliamps. ... It is a good idea to include one of these diodes whenever you are switching a relay or motor with a transistor.