LED Wave Circuit Build Guide

For this project, you’ll need:

• A full-size breadboard with a T-connector for GPIO access

• 8 LEDs (I’m using blue LEDs, though any color or mix of colors is fine)

•  5 jumper wires

• 4 resistors (mine are 470 Ohm - most resistors in the kit should work fine, but if your LEDs end up being really dim then try changing them out)

To begin, plug your first LED into the breadboard. The longer leg (the (+) anode) should be on the upper row (row 25 in the picture) and the shorter leg (the (-) cathode) on the lower row (row 29). LEDs are directional, and they won’t turn on if plugged in backwards.

Plug in a second LED next to the first one, with the long leg and the short leg in the same respective rows as the first LED. I left a 1-column space between them so they weren’t too crowded.

Go through the same process with the next 6 LEDs. The second set of LEDs is plugged into row 31 and 35, the third set is on row 37 and 41, and the fourth set is on row 43 and 47.

Plug your first resistor into the breadboard by the first row of LEDs. One leg should be plugged into the row with the cathode, and the other should be plugged into the negative blue rail. Resistors aren’t directional like LEDs are, so orientation shouldn’t matter here.