24 Second Countdown Timer Circuit


Posted on Feb 7, 2014

Here is countdowntimer24 second circuit. Thistimercircuit build for automatis on or off electronic load. Thetimercircuits uses fast 74LS schottky IC`s. A 24 second countdown starts when S3 is off and S2 is pressed. Switch S3 is used to start/pause the countdown. S2 resets the countdown (99 to 00) when the countdown reach 00. To restart the countdo


24 Second Countdown Timer Circuit
Click here to download the full size of the above Circuit.

wn to 24 Seconds S1 is pressed. Here is a schematic 24 second countdown timer circuit :




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