The Rat Trap 2000 is a completely OTT yet humane rat catcher – it uses an Arduino UNO as the controller and an IR sensor to detect rodents chowing away on the food – we used apple and maize as bait. The moment a rodent is detected, the Arduino actuates a servo motor that pulls a pin from the trap door and closes the entrance.
To see what is happening, I setup a webcam and a motion daemon on my eee-pc. The following very short clip shows the money shot:
Ok, it is very fast, but it shows two rats inside the trap and right at the end of the clip the trap door closing.