Control different speed of a small DC motor with push button

Hi, in this post I would like to share with the sketch (down below) of a pwm speed controller and the diagram of it. By uploading the skecth to your Arduino board you will be able to control speed of a small dc motor without a potentiometer and without pressing the reset button. Thanks to Jerico Viñas who shared the original sketch.

The sketch

const int motor = 4; const int btn1 = 5; const int btn2 = 6; const int btn3 = 7; int button1 = 0; int button2 = 0; int button3 = 0; int var1 = 0; int var2 = 0; int var3 = 0; void setup() { // put your setup code here, to run once: Serial.begin(9600); pinMode(btn1,INPUT); pinMode(btn2,INPUT); pinMode(btn3,INPUT); pinMode(motor,OUTPUT); } void loop() { //Unlimited Execution // Eco-Programmer AST(); } void AST(){ //This is the customized void button1 = digitalRead(btn1); button2 = digitalRead(btn2); button3 = digitalRead(btn3); if(button1 == HIGH){ var1=1; var2=0; var3=0; Serial.write(var1); } if(button2 == HIGH){ var1=0; var2=1; var3=0; Serial.write(var2); } if(button3 == HIGH){ var1=0; var2=0; var3=1; Serial.write(var3); } if(var1 == 1){ digitalWrite(motor, HIGH); delay(15); digitalWrite(motor, LOW); delay(40); } if(var2 == 1){ digitalWrite(motor, HIGH); delay(15); digitalWrite(motor, LOW); delay(20); } if(var3 == 1){ digitalWrite(motor, HIGH); delay(50); digitalWrite(motor, LOW); delay(10); } else{ digitalWrite (motor, LOW);  } }

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