LED Rainbow - RGB LED PWM Controller Construction - Easy To Build

Step 4 Assembly Step 1: Diode D1

Position D1 (1N4002) diode. You will notice a silver/white bar on the diode. This is the Cathode and should match the silk-screen on the PCB. Ensure that the bar on the diode is towards the bottom of the component. Solder in D1 now.