Arduino Transistor Relay

We have connected transistor base to arduino pin a0 through a 1k resistor. 2 since an arduino pin sources max 25ma the relay cannot be switched directly from the arduino pin. The picture above shows the circuit you need to build.

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Arduino transistor relay.

In this arduino relay control circuit we have used arduino to control the relay via a bc547 transistor. Nel video spiego sia il circuito che lo sketch necessario. Therefore eg a transistor bc547 or 2n2222 etc should be used search in google for more details and sample circuits for switching the relay. In this project the npn transistor 2n2222 drives the relay when the npn junction gets saturated.

Working of the project. 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 detail instruction code wiring diagram video tutorial line by line code explanation are provided to help you quickly get started with arduino. The coil of the relay needs a large current around 150ma to drive the relay which an arduino cannot provide.

Arduino board jumper wires breadboard. 1 x tip120 darlington transistor is recommended but any one that will handle your relay will work. An ac bulb is used for demonstration. Therefore we need a device to amplify the current.

2 x 220ω resistors. 1 x sharp pc817 optocoupler. Con questo video imparerai a collegare un transistor bipolare ad arduino per pilotare un relè. 1 x 1n4001 diode.

A simple project in which arduino uno controls a 5v relay is explained here. 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. Therefore we need a device to amplify the current. The working of the project is based on the functioning of the relay and the ability of arduino to.

Circuit diagram and working. Below given is relay driver circuit to build your own relay module. The optocoupler is the most important part it isolates the circuit from the relay using. The coil of the relay needs a large current around 150ma to drive the relay which an arduino cannot provide.

The parts you will need. In this project the npn transistor 2n2222 drives the relay when the npn junction gets saturated.

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Arduino Transistor Relay

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