This instructable is for solar powered heart with a pulsing red LED. It measures about 2" by 1.25", including the USB tab. It has one hole through the top of 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.
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 16 pieces to solder onto the board, and all but one is through hole. Depending on your soldering savvy it may take anywhere from 30 to 45 min.
So lets begin!
Step 1: Tools
Here's what you need:
A soldering iron
Needle nose pliers or tweezers
Helping hands are optional, but helpful.
Step 2: Schematic and Parts list
Schematic is above.
Parts list is below.
C1 - 47uF ceramic capacitor (medium blue one)
C3 -0.033uF Timing capacitor (little blue one)
U1 - MCP6042 dual micro-amp op-amp
R7 - 7.5M resistor
R1 and R6 - 330ohm resistor
R2 through R5 – 10M resistor
T1 - 30v schottky
S2 - 4s aSI 25x10 solar array
C2 - can super cap
D2 - Blue LED, charge indicator
D3 - Red LED, Blinky
Switch - SPDT switch 3-pin 0.1 spaced