The Defusable Clock kit is an electronics kit that lets you build a scary looking clock that you can actually "defuse". Only the electronics are included -- you use your imagination to build the device you want!
Use modeling clay, paper towel tubes, stuffed animals, etc!
The Defusable Clock is a fully-functional alarm clock just like you’d
expect (a normal beeping alarm, snooze alarm, etc.). But at any time you
can press the big red button to start a scary countdown sequence
exactly like bombs in Hollywood movies.
There are four wires across the top of the clock and you have 10 seconds to cut the correct wire; one wire stops the countdown, one saves the day, and two have no effect. The wires are randomly chosen every time the button is pressed for a new challenge every time. (The wires are held in with screw terminals for easy replacement, or just leave them a little loose so you can just pull out the wire.)
Basic soldering is required for this kit.
9V (200ma min) power adapter required but not included.
(This kit is just a clock with some wires. Please do not display it / use it such a way that would cause people to panic. It is intended strictly for novelty! Use at your own discretion!)
Usage Guide
Setting the Time
To set the time, simply press the HOUR and MIN buttons. You can hold
the buttons to make the numbers advance automatically. When setting the
hour, the LED marked PM will indicate that the hour is PM. (The PM LED
is only lit when setting the time and alarm because it is quite bright
and distracting.)
Setting the Alarm
Hold down the ALARM button (lower left corner of board), then use the
HOUR and MIN buttons to set the alarm time. The LED marked PM indicates
if the alarm time is PM.
There are 3 alarm modes, OFF, ON, and DEFUSE. To cycle through the
alarm modes, hold the ALARM button, then press the large red DET button.
Two LEDs indicate which mode the alarm is in. One LED is near the
ALARM button, the other is near the large red DET button.
| LED indicators | alarm behavior |
| alarm OFF | alarm LED off, DET LED off | alarm is off |
| alarm ON (normal mode) | alarm LED on, DET LED off | alarm will beep |
| alarm ON (defuse mode) | alarm LED on, DET LED on | alarm will beep a few times, then 10 second countdown sequence begins |
Turning off the Ringing Alarm
When the alarm is beeping (normal mode), turn the alarm off by pressing the alarm button.
For snooze, press the red DET button. Alarm will ring again in 9 minutes.
If you are using the "defuse" alarm mode, you can try to defuse the
clock by cutting the right wire. Otherwise, the 10 second countdown
will reach 0 and the device will "detonate".
Starting the Countdown Sequence
Press the red DET button to start a 10 second countdown sequence. If
you want the countdown length to be longer, press the HOUR and MIN
buttons before releasing the DET button. You can set the countdown to
be up to 99 minutes and 59 seconds.
During the countdown, choose the correct wire to defuse the device. One
wire stops the countdown safely, two have no effect, and one will cause
the device to detonate immediately. The role of each wire is assigned
randomly each time the DET button is pressed.
Defusable Alarm Clock 
RTC chip please 
