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

Step 7 Assembly Step 4: Capacitor C1

The next component to go in will be C1, a 33uF Electrolytic Capacitor. It is important that you watch the markings on this component. Normally, the negative lead is marked on the outside, with a minus (-) sign. Ensure that you do not put it in backwards on the PCB. The negative lead should not go in the hole on the board with the plus sign is. Install C1 now, double check it is in properly and solder it in place.