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
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