Make sure the adjustment knobs for sensitivity and on-time for the motion sensor are facing up so you can modify how sensitive your device is and how long it stays on to signal your Arduino.

Using motion detectors and an Arduino you can trigger lights, fans, or even an pneumatically controlled cleaver-wielding clown to help add your house to the “if you dare” list.

Created by Rabid Prototypes the Arduino development board allows you to easily add light, sound and motion sensors to your creations and is powered by a 48MHz 32-bit ARM Cortex M0+ micro ...