Play a prank on your friends (enemies?) by hiding a high-pitched beeper which sounds off at random time intervals. This instructable uses minimal parts. All that is required is:
Why don't I just use a 555 timer chip? You certainly could. I like this method because:
1. The ability to beep at random intervals
2. Minimal parts needed (simplicity/elegance of design)
3. I wanted to use a microcontroller (because I recently started the journey of learning about microcontrollers)
This project was inspired by an article
in MAKE magazine about making a similar device with a 555 timer chip.
After making my prototype, I searched instructables.com and found the Raven
, which is a similar beeping thing using a microcontroller. I decided to add my instructable because it uses less parts and has random intervals.