Halloween Spider
This detects trick-or-treaters approaching my door, and lowers a giant spider to eye-level behind them. When they turn around, surprise!
Parts:
- PIR sensor http://osepp.com/products/sensors-arduino-compatible/passive-infrared-sensor-pir-module/
- Continuous-rotation servo https://www.parallax.com/product/900-00008
- Thread or fishing line for attaching the spider to the servo
- Spool for raising and lowering the spider
- Very spoopy spider