Dual-clock reaction time tester (from seb) - REACTIME-Model.pdf - REACTIME REV A-Model.pdf
This modification (wiring the display counter's RESET line to the
output of the START switch) will cause the display to go to all
zeroes as soon as the START switch is pressed instead of waiting for
U1, the 1 second delay timer, to time out.
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JF
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