Introduction: DIY: Relay Switch Motor Controller - Arduino
Hello everyone,
In this tutorial, we will be building a motor controller using two relay switches and an arduino.
Components used in this project:
SainSmart UNO R3: http://www.amazon.ca/gp/product/B00E5WJSHK?psc=1&...
9v battery: http://www.amazon.ca/Tenergy-Charger-250mah-Recha... http://www.dx.com/p/dd15-dc-9v-battery-button-pow...
M-F jumper wires: http://www.amazon.ca/Accmart-Flexible-Breadboard-...
Motor: http://www.amazon.ca/6760RPM-Rotary-Speed-bornes-...
5V relay switch: http://www.amazon.ca/SainSmart-2-CH-2-Channel-Rel...
Step 1: Connect the Motor & Power Supply
Connections:
Motor positive - Relay switch 1 COM input
Motor negative - Relay switch 2 COM input
9v battery positive - Relay switch 1 NO & Relay switch 2 NO
9v battery negative - Relay switch 1 NC & Relay switch 2 NC
Each relay switch has three inputs
NO (Normally open) ,COM (Common) and NC (Normally closed)
In this project, both wires from the motor will connect to both of the COM (middle) inputs of the relay switches.
The positive wire from the 9v battery will connect to both of the NO (top) inputs.
The negative wire from the 9v battery will connect to both of the NC (bottom) inputs.
This external power supply (9v battery) will be used to power the motor. This can be changed to control the speed of the motor.
Step 2: Connect the Arduino
Connection:
Arduino 5v pin - Relay module VCC pin
Arduino GND pin - Relay module GND pin
Arduino pin#7 - Relay module IN1
Arduino pin#8 - Relay module IN2
After we finish connecting the motor, all we need to do is power the relay switch module itself. using the arduino, we can connect the wires and send signals to activate the relay switches.
Step 3: Upload the Code:
#define CW 7 //CW is defined as pin #7//
#define CCW 8 //CCW is defined as pin #8//
void setup() { //Setup runs once//
pinMode(CW, OUTPUT); //Set CW as an output//
pinMode(CCW, OUTPUT); //Set CCW as an output//
}
void loop() { //Loop runs forever//
digitalWrite(CW,HIGH); //Motor runs clockwise//
delay(1000); //for 1 second//
digitalWrite(CW, LOW); //Motor stops//
digitalWrite(CCW, HIGH);//Motor runs counter-clockwise//
delay(1000); //For 1 second//
digitalWrite(CCW, LOW); //Motor stops//
}
//end of code//
Download the code here:
Step 4: Done!
If everything was done correctly, you should end up with a motor that spins clockwise for 1 second and counter-clockwise for 1 second.
As always, you can modify the code and change the voltage for your own projects.
If you want to see this project in action, please click on the link below:
Participated in the
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