This classic "Eyes That Follow" optical illusion creates the effect that eyes are watching your every move.

This easy tutorial can be quickly assembled in 45 minutes. This is also easily adaptable. For example, add a set of "following eyes" to a pumpkin to create a creepy jack-o-lantern, or use a glow stick as a quick-to-setup light source.

Step 1: Materials

Pingpong ball (1 or 2)
Cardboard Box
X-Acto knife or Scissors
Cutting Board
Hole Puncher
Single-Sided Tape
Double-Sided Tape
NeoPixel Strip (length of 10 LEDs)
Adafruit Gemma
3 x AAA Battery Pack
AAA x 3
Alligator Clip Test Leads x 3
USB Cable - A / MiniB
Black Sharpie Marker
Multimeter for Debugging Gemma and LED strip (in case you need to debug the electronics)
<p>I'm thinking about adding a PIR sensor to switch the eyes on when someone approaches. Can that be hooked up to the Gemma as well ?</p>
<p>great project, i love it. Used a WS2801 strip and an attiny85 for random colors and delays. Powered by usb (power bank)</p>

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