DC motor with arduno

    DC Motor

 A DC motor (Direct Current motor) DC motors generally have just two leads, one positive and one negative. If you connect this two leads directly to a battery, the motor will rotate. If you switch on, the motor will rotate in the opposite direction.

Warning − Do not drive the motor directly from Arduino board pins. This may damage the board. Use a driver Circuit or an IC.

- we can use relay instead of motor IC. 

We will divide this chapter into three parts −

• Just make your motor spin
• Control motor speed
• Control the direction of the spin of DC motor

Components Required

You will need the following components −

• 1x Arduino UNO r3
• 1x PN2222 Transistor
• 1x Small 6V DC Motor
• 1x 1N4001 diode
• 1x 270 Ω Resistor

motor connections with arduino -

code-

const int pwm = 2 ; //initializing pin 2 as pwmconst int in_1 = 8 ;const int in_2 = 9 ;
//For providing logic to L298 IC to choose the direction of the DC motor 
void setup(){pinMode(pwm,OUTPUT) ;   //we have to set PWM pin as outputpinMode(in_1,OUTPUT) ;  //Logic pins are also set as outputpinMode(in_2,OUTPUT) ;}
void loop(){//For Clock wise motion , in_1 = High , in_2 = Low
digitalWrite(in_1,HIGH) ;digitalWrite(in_2,LOW) ;analogWrite(pwm,255) ;
/*setting pwm of the motor to 255we can change the speed of rotaionby chaning pwm input but we are onlyusing arduino so we are using higestvalue to driver the motor  */
//Clockwise for 3 secsdelay(3000) ;   
//For brakedigitalWrite(in_1,HIGH) ;digitalWrite(in_2,HIGH) ;delay(1000) ;
//For Anti Clock-wise motion - IN_1 = LOW , IN_2 = HIGHdigitalWrite(in_1,LOW) ;digitalWrite(in_2,HIGH) ;delay(3000) ;
//For brakedigitalWrite(in_1,HIGH) ;digitalWrite(in_2,HIGH) ;delay(1000) ; }