PWM Speed Control
/*
* Project name:
DTMF Decoder
* Copyright
(c) Researchdesignlab.com
* Description:
* Test configuration:
MCU: ATMEGA328
Dev.Board: Arduino uno
Oscillator: 16 MHz
Software: Arduino
*/
int E1 = 9;
int M1 = 4;
int E2 = 10;
int M2 = 5;
void setup()
{
pinMode(M1, OUTPUT);
pinMode(M2, OUTPUT);
}
void loop()
{
int value;
for(value = 0 ; value <= 255; value+=5)
{
digitalWrite(M1,HIGH);
digitalWrite(M2, HIGH);
analogWrite(E1, value); //PWM Speed Control
analogWrite(E2, value); //PWM Speed Control
delay(100);
}
}

