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Delay Alarms Circuits
Designed by David A. Johnson, P.E.

Last Updated on: Sunday, July 27, 2008 07:41 PM
Master Category List - Dave's Circuits
 
  • LONG PERIOD COMPUTER WATCH DOG TIMER
    This circuit uses a simple 4060 IC oscillator/timer that is reset periodically by a computer. Should the computer fail to send a pulse, the output changes state. The time can easily be set from seconds to hours.


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