Light-Activated Pixel Heart
Wear your heart on your sleeve! Or at least on your lapel. This light-up heart display uses a light-dependent resistor and GEMMA, Adafruit’s tiny wearable electronics platform.

Supplies
- Gemma microcontroller
- Sewable pixels x8
- Conductive thread
- Light-dependant resistor (aka LDR/photoresistor)
- Small lipoly battery
- Woven fabric
- Clear nail polish
- Multimeter
- Scissors
- Sewing needle
- Embroidery hoop
- Alligator clips
- Pencil or embroidery marking pen
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Circuit Diagram

NeoPixels are chained together with data input coming from GEMMA D1, all + to Vout, and all – to GND.
The photoresistor is attached to D2 and GND.
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