24 Second Shot Clock Mk 2

A new 24 second countdown timer from Milardo. The circuits uses fast 74LS schottky IC’s.

24 Second Shot Clock Mk 2

Here is how the circuit works:
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 countdown to 24 Seconds S1 is pressed.

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