Instructables

Step 1: WHat you`ll need

for this project you will need;

  - Any LED that needs less than 5 Volts.
  - The correct resistor for that LED. You can easily calculate it here.
Instructable was worth it for that web page alone for educational purposes. Not fond of advertisements.
Screenshot-LED Resistor Calculator - Mozilla Firefox-1.pngScreenshot-LED Resistor Calculator - Mozilla Firefox-2.png