Do this before you sew anything onto your sweater just to make sure the LED string will correctly fit the pattern you drew. Start with the end of the string so the Arduino ends up at the bottom of ...

Yep, RGB LED Christmas Lights with PWM for under $7. Can’t beat that. [James] wrote an Arduino library to control these strings and put it up on Github.

This post will give you an Arduino Pixel LED Controller build idea. The inspiration for this post was an old Pixel LED kit I found in my junk box (see the lead image). The locally made kit includes a ...