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

Step 9 Assembly Step 6: Pushbutton Switch S1

It is now time to install the push button switch at S1. This switch is not polarized, but it will only fit into the board one of two ways. The switch is actually wider than it is tall, so try it both ways to see which way it fits best. You will know you have it in the correct position when it will push into the board with a little force. Go ahead and solder in S1 now.