Halloween Photoresistor Circuit

Spooky skeleton’s eyes glow when it gets dark out.

Here is a simple project we made for Halloween.  We used a photoresistor and a couple of LEDs to make a spooky skeleton with eyes that light up when it gets dark out.

The Parts:

  • Small rubber skeleton (Party City)
  • Tiny breadboard (I cut a larger breadboard into pieces)
  • Resistors (68 Ω and 82 KΩ or similar)
  • 2N2222 Transistor
  • Photoresistor (eBay)
  • Two red LEDs
  • One double “AA”  (or “AAA”) battery box – as long as the output is 3V
  • Small piece of insulated wire

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