Picture of Solar powered Blinky LED Jewelry

This instructable is for solar powered LED blinky awesomeness. It is a kit version of our popular blinky red square. It measures about 1.25" by 1.25", not counting the USB tab. It has a few holes through the board, making hanging easy. Wear it as a necklace, earrings, bond on a pin, or hang it in a window. The possibilities are up to you, and we'd love to see what you do with them.

Square Kit02.mp4 from Robin Lawson on Vimeo.

The schematic and parts list are included. You are welcome to wire up your own, copying is the sincerest form of flattery. We also have the kit available in our Store.

If you have soldered projects before, this will be easy. There are only 20 pieces to solder onto the board, and all are through hole. Depending on your soldering savvy it may take anywhere from 30 to 45 min.

So lets begin!

Remove these adsRemove these ads by Signing Up

Step 1: Tools

Picture of Tools

Here's what you need:

A soldering iron
Diagonal cutters

Helping hands are optional, but helpful.

Step 2: Schematic and Parts list

Picture of Schematic and Parts list

Schematic is above.

Parts list is below, in the suggested order of assembly.

C1 - 47uF ceramic capacitor (medium blue one)
C3 -10uF ceramic capacitor (little blue one)
C5 - 0.033uF Timing capacitor (TINY tan one)
U1 - MCP6542 dual micro-amp comparitor
R6 - 330ohm resistor
R1, R3, R4, R5 - 10M resistor
SC1 through SC6 - BPW34 photo-diode
D1 and D2 - red LED to blink
Switch - SPDT switch 3-pin 0.1 spaced
C2 and C4 - 0.5F 2v7 can super cap