Arduino (thus reducing an amazing bit of technology to a USB powered fire hazard). I needed something to fill time while a new one shipped to me. Then it hit me--the Nerf dart, I mean--and I realized what I wanted to build. So, without further ado, I will show you how to build a laser tripwire sentry nerf bomb with a few parts form Radio-Shack and Jameco, and a pet-toy laser pointer. It's also worth pointing out that the tape on the canister you see in the picture has no apparent use. It did in a previus prototype, but you need not add it.. To briefly describe the end result, we will be building an elastic-loaded canister which can fire 4-5 Nerf darts at a person when that person walks through the laser beam. i call it the sentry bomb and it's great for Nerf games and startling you're freinds. Not to mention that with minor modifications you could turn it into a security device, minor modifications like replacing the launcher with an alarm. If you're new to electronics, then the circuit might be tricky for you, but once you understand it, its really quite simple. Have fun building!
To the parts list!