While there’s no PCB involved, [designer2k2] built a desktop “hollow” Christmas tree ... that really makes this tree. The code cycles through colors and some light chaser effects, as ...

Specifically, [Andy] has a long string of programmable RGB LED lights to wrap around a Christmas tree, but didn’t want to spend time manually mapping out each light’s location. So he used ...

No matter what kind of lights the machine makes, they're finally ready to be hung up on a Christmas tree.