Using Analog Input & Output by utilizing Arduino's Pulse Width Modulation (Fake Analog) to Control the brightness of an LED or motor.
Code
int ledPin = 9;int analogValue = 0;int brightness = 0;void setup() { Serial.begin(9600); pinMode(ledPin, OUTPUT);}void loop() { analogValue = analogRead(A0); brightness = analogValue/4; analogWrite(ledPin, brightness); Serial.println(analogValue);}