DC motor
- Components used
red and blue LEDs, diffuser made out of tissue, paper fan with DC motor, potentiometer, Arduino board, transistor, diode, resistors and so on.
- Description
Fan controlled by the potentiometer cools down the object: it shows the temperature of it - when the fan is off, the object is hot (red) and as fan goes faster and faster, the object is cooled down and becomes more blue.
- Video available here:
http://www.youtube.com/watch?v=nh9D24r9jZ0
- Arduino Code
int potPin = 0; // select the input pin for the potentiometer
int motorPin = 9; // select the pin for the Motor
int red = 5; //select the pins for LEDs
int blue = 6;
int val = 0;
int x = 0;
void setup() {
Serial.begin(9600);
}
void loop() {
val = analogRead(potPin);
x = map(val, 0, 1024, 0, 255); //maps 0-1024 to 0-255 to use analogWrite
analogWrite(red, 255-x);
analogWrite(blue, x);
analogWrite(motorPin, x);
Serial.println(x);
}
