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DIY Fire Alarm Clock – loud, loud, and red, red..


This DIY Fire Alarm Clock may be overkill, but hey, maybe you’re a little deaf? Eh? What’s that you say?

 This hack takes a standard cheap alarm clock, some interface components and a fire alarm bell to get the job done right. Normally these small alarm clocks use a piezo buzzer to attempt to wake you up. The alarm signal is hijacked from the clock circuit board and used as an input to the interface board.

Red – who has written posts on The Red Ferret Journal.

1 Comment

  • Great idea, for a PRANK to your roomate even.

    I’ve seen this done in the past with other clocks, including an Atomic Clock for some examples

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