Motor Control Using transistor and Relay

This tutorial explains following concept, Transistor Switching, Working of Relay, Controlling motor using Transistor and Relay. This tutorial is based upon Robo India’s Tutorial of Relay on Arduino. 

1. Introduction:

This tutorial is in the continuation of Transistor and Op Amp (LM358) comparator tutorial. Output of LM358 is used to trig Transistor to operate relay. Then relay is controlling Motor.

1.2  Working of Relay:

Following Video of Robo India explains working and concept of relay-

1.3 46ND006-P:

This is the relay we are going to use. This relay has got two poles, means there are two switches but both are trigged by a single Coil thus they operate simultaneously. Following Diagram will give you better understanding about the relay we are using.

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2. Required Hardware

Following Hardware will be required to perform the example of this tutorials.

S.No.	Item	Quantity
1.	Robo India’s Basics of Electronics Kit Platform (Without transoformer)	1
2.	9 Volt Battery with connector	1
3.	Male to male Jumpers	20
4.	1 K Resistance	2
	4.7 K Resistance	2
5	5 Volt – 2 Pole relay.46ND006P	1
6.	NPN Transistor – 2N2222	1
7.	Indicator LED	1
8.	Hobby DC Motor	1
9	10K Pot	1
10	Op Amp LM358	1
11	Diode	1

3. Circuit

This circuit is in the continuation of other tutorials of Robo India.Op Amp as comparator, Transistor. The motor will be controlled through 10K pot. As the voltage from Pot goes high than the voltage at Pin 3 of LM358 Motor gets off. It is to be noted that this Pot will not control speed of motor.

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The relay is rated for 5V. Thus relay and Op Amp is supplied 5V through 7805 Voltage Regulator. And motor is connected to 9V through relay.

If you have any query please write us at support@roboindia.com

Thanks and Regards
Content Development Team 
Robo India
http://roboindia.com