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Gadget Freak Case #259: Gag Bomb Countdown Timer

Chandrakanth Pollishetty
7/18/2014   13 comments

I created this Hollywood movie-style gag bomb that doubles as an alarm clock and a countdown timer. This is a fun project that you can build in a day or two. It is made using an 8051 microcontroller.

The project can be easily done with other microcontrollers or an Arduino, or you can even hack an old digital clock for this purpose. It is a fun gag that will look cool on your desk and can be used as a prank, a desk clock, or just a kitchen timer.

This Hollywood movie-style gag bomb doubles as an alarm clock and a countdown timer.

[Tax-chick]

Nice!

[Scoutmaster]

In 1992 or '93, I was at a seminar in Tucson. Every day my drive from the hotel to the conference center took me past a place called the Spy Store or the Spy Shop.

One day, after sessions, I decided to make a stop.

The store sold those items, with either an analog or digital clock. The TNT sticks were in a greasy reddish paper.

The countdown timer worked on a mercury switch so that when you picked it up, the analog clock's second hand would start at two minutes, or the digital clock would start counting down from two minutes.

It was the kind of thing I would have purchased, if I hadn't been through the whole FBI - we build the rockets in our garage - OKC bombing - Cub Scouting deal I've mentioned here before.