Picture of Solar Powered Owl Blinky LED Pendant Jewelry

This instructable is for solar powered Owl with amber LEDs for eyes. 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 19 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!

Owl Kit01.mp4 from Robin Lawson on Vimeo.

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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
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 - 0.022F coin super cap

thisoldgeek6 months ago

Nice kit, just built one (12/12/2014). What's the reason for doing surface mount soldering on most of the parts? Many of them appear to be through-hole with plated holes on the bottom. Would be much easier to solder on the bottom.

lumenjewelry (author)  thisoldgeek6 months ago
​An additional reason to solder from the top is that bending the leads to hold the parts in while soldering makes it FAR harder to pull out mis-placed parts. Also, assembly goes faster when you're not constantly flipping the board over.
lumenjewelry (author)  thisoldgeek6 months ago

Thanks! You can certainly solder most of them on the bottom. However they may fall out when the board is flipped over as not all of the parts are tight in the holes. This may cause frustration or losing parts, so we recommend soldering on the top.

dudes10 months ago