Quartz Pendulum Wall Clock Circuit

This pulse is inverted by ic1a and inverted again by ic1b which then clocks ic2 a 4013 flipflop. This means that with the pendulum swinging in 0 5s beats we get a short pulse from the photo interrupter at 1s intervals. Conversely when the pendulum swings the other way the vane must continue to interrupt the light.

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Quartz pendulum wall clock circuit.

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