Two Cmos Based 24-Hour Timers circuit


Posted on Feb 6, 2014

A pair of multi-range timers offering periods of up to 24 hours and beyond. Both are essentially the same. The main difference is, that when the time runs out, Version 1 energizes the relay and Version 2 de-energizes it. The first uses less power while the timer is running; and the second uses less power after the timer stops. Pick the one that best suits your application..


Two Cmos Based 24-Hour Timers circuit
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