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Timers built using a Casio watch were first seen in early 2000. The device detects the watch alarm output to trigger the device. Several varieties of alarm detector circuitry have been seen (Sheets 03340 & 84071) with this being the simplest. Time delays up to 23:59 can be achieved.
*Time Delay: User programmable up to 23 hours, 59 minutes in one minute increments.
*Power Source: Standard 9-Volt batteries, connected through a slide switch on the side of the case, is used to power the detector circuit and detonator. The watch operates on its internal battery.
*Anti-Tamper Features: None
*Watch Type: This device used a Casio F-91W, but other digital alarm watches could be utilized.
*Size: The plastic case containing the battery and detector components measures 57 mm square x 16 mm thick (2.25" square x 0.63" thick).