Arduino Transistor Relay

We have connected transistor base to arduino pin a0 through a 1k resistor. Since we need to control this relay with the help of arduino a transistor is used with an additional pin called control pin on the relay module. The parts you will need.

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In this project the npn transistor 2n2222 drives the relay when the npn junction gets saturated.

Arduino transistor relay.

The detail instruction code wiring diagram video tutorial line by line code explanation are provided to help you quickly get started with arduino. The picture above shows the circuit you need to build. An ac bulb is used for demonstration. 1 x sharp pc817 optocoupler.

In this arduino relay control circuit we have used arduino to control the relay via a bc547 transistor. The coil of the relay needs a large current around 150ma to drive the relay which an arduino cannot provide. 2 x 220ω resistors. Learn how to use relay with arduino how relay works how to connect relay to arduino how to code for relay how to program arduino step by step.

Circuit diagram and working. The working of the project is based on the functioning of the relay and the ability of arduino to. Nel video spiego sia il circuito che lo sketch necessario. 1 x tip120 darlington transistor is recommended but any one that will handle your relay will work.

The optocoupler is the most important part it isolates the circuit from the relay using. Arduino board jumper wires breadboard. Working of the project. Below given is relay driver circuit to build your own relay module.

1 x 1n4001 diode. In this project the npn transistor 2n2222 drives the relay when the npn junction gets saturated. The coil of the relay needs a large current around 150ma to drive the relay which an arduino cannot provide. This video npn transistor based 12v dc relay control drive simple make it this type transistor is a semiconductor device used to switch electronic signals a.

Therefore eg a transistor bc547 or 2n2222 etc should be used search in google for more details and sample circuits for switching the relay. 2 since an arduino pin sources max 25ma the relay cannot be switched directly from the arduino pin. Therefore we need a device to amplify the current. A simple project in which arduino uno controls a 5v relay is explained here.

Con questo video imparerai a collegare un transistor bipolare ad arduino per pilotare un relè. Therefore we need a device to amplify the current.

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