Gallery of Defusable Clocks and Game Timer Pro Builds

Have you built an awesome Defusable Clock or Game Timer Pro? Send your images/videos to and tell us how you built it!

From Jason in Naven, Ireland

Jason built this rugged device for use in Airsoft games in Ireland. He modified the code so that the wires need to be disconnected in a particular order. The user needs to look up the sequence in a code book. Talk about pressure! Nice job, Jason.

From Pavel in St. Petersberg, Russia

Pavel built this device for a museum exhibit in St. Petersberg. He’s got wires rigged to start/stop a video. It looks like museum visitors get to control a robot to try to defuse the device. WOW.

This looks like a lot of fun!

From Annette in Arizona, USA

This is one of the most amazing builds we’ve seen so far. This is intended as a movie prop and there’s plenty of awesomeness going on here.

Annette wrote that this is “built largely out of laser-cut acrylic, with the cylindrical chassis made of 3″ ABS drain pipe. I raided my junk box (and other people’s junk boxes!) for assorted cool-looking parts to tack on.”

There a lot more info about this project in the Instructables article that she wrote up. Lots more pictures! Great work!

From Rob in Whitby, Ontario, Canada

Rob used an old electric typewriter case and added a clear plexiglass cover. A stainless steel thermos makes a very convincing explosive container.

Rob is using this device in an “escape room” game where the competitors must solve a series of puzzles, ultimately needing to unlock this case and cut the correct wire to defuse the bomb!

From Mike in Tijeras, New Mexico, USA

Mike built this excellent movie prop for a film of some sort, and I think it looks great. The studio owner he was working with liked it so much that he offered to buy it!

From Neil in Hoddesdon, UK

Neil with Fenland Airsoft in England made this great MILSIM prop. He added lots of hardware like two key-switches, a motion sensor, and a relay-driven siren that will make your ears bleed. His device has special software that causes the countdown to speed up when the wrong wire is disconnected! For all the details, watch his extremely comprehensive video.

From Rick in Dunbarton, New Hampshire, USA

Rick built a classic C4 plastic explosive device using plasticine clay. Notice the mercury tilt switch from an old thermostat on the top of the device. It is connected to the detonation button, so if you don’t handle this carefully, you will start the countdown sequence automatically! Besides, the mercury switch makes it look cool.