Analog Read/Write

• Analog pins don't require pinMode -- they are fixed

• analog read pins are on a separate set up pins

• analogue write pins (PWM pins) are on 9, 10, and 11

• analogWrite takes a pin and a value (but the value must be between 0 and 255)

• analogRead takes a pin (must be numbered from the analog pins) and returns a value 0 - 1023
• This is four times larger than analogWrite
• The number corresponds with the voltage
• 0 is 0V
• 1023 is 5V
• You can test your sensors and see what voltage that give off with a multimeter, then build your circuit around that
• or check the output from serial and calibrate your application that way