This circuit has an adjustable output timer that will re-trigger at regular intervals. The output period can be anything from a fraction of a second to half-an-hour or more - and the output can be made to recur at regular intervals of anything from seconds to days and beyond.
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Repeating Timer Circuit - Photograph

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Repeating Timer
Schematic
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Circuit Board

This is a photograph of the Cmos based Repeating Timer. It has an adjustable output timer that will re-trigger at regular intervals. The output period can be anything from a fraction of a second to half-an-hour or more - and it can be made to recur at regular intervals of anything from seconds to days and beyond.


A Photo Of Ron J's 
 Cmos 4060 Based  
  ''Interval Timer''


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Repeating Timer
Schematic
The Rest of Ron's Circuits Write To Ron More Free-to-Use Circuits Circuit Exchange International