This instructable is for solar powered Skull with sinister red LED eyes. It measures about 2 1/2" by 1 3/8", including the USB tab. It has one hole through the top of the board, making hanging easy. Wear it as a necklace, earrings, keychain, 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.
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 19 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. Watch it in action here!
So lets begin!
Step 1: Tools
Here's what you need:
A soldering iron
Helping hands and needle nose pliers are optional, but helpful.
Step 2: Schematic and Parts
Schematic is above.
Parts list is below.
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
SC1 through SC6 - BPW34 photo-diode
R6 - 330ohm resistor
R1, R3, R4, R5 - 10M resistor
D1 and D2 - amber LED to blink
Switch - SPDT switch 3-pin 0.1 spaced
C2 - 0.03F coin super cap