[Arduino] Basics

Posted on 2018-10-31 | In arduino , basic |

LED

Anode: + the input foot (longer)
Cathode: the output foot

Typical LED forward voltages

Red: 2.0V
Yellow: 2.1V
Green: 2.2V
Blue: 3.5V
White: 3.2V

Resistance and Ohm’s law

I = U/R