But then I added a few features:
- A delay circuit that makes it look more alive as it gives the impression of doing some thinking before it responds to the switch.
- Sound that varies with how open the lid is and the amount of light that hits the photosensitive resistor. It was inspired by the design of the Growl and Scream Altoids of FightCube.
- A couple of LEDs, a red one when it opens and a blue one when it closes.