I have this idea for a real life version of the search and destroy game type from the call of duty series. But using airsoft guns (safety first). What I need is the "bomb", I found a cool alarm clock on amazon here http://www.amazon.com/dp/B00BWJ47SY/?tag=047-20. We need to mod it into a briefcase and have a plant sequence that starts a countdown and a disarm sequence that stops the countdown. Also an explosion noise would be cool if the time runs out, and some sort of noise to know when someone disarmed the bomb.
Edit: I found Just the board for sale. anyone have anyideas to reprogram it http://www.robotshop.com/defusable-clock-kit.html?utm_source=google&utm_medium=base&utm_campaign=jos