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Timers and Counters Circuits, Page 2c
Timers & Counters:  #-A     Previous B-E    F-L     M-S     T-Z
Last Updated on: Wednesday, November 29, 2017 05:38 AM
Circuits Designed by Dave Johnson, P.E. :
  • CIRCUIT FORMS DIVIDE BY 1.5 COUNTER
    Two inexpensive ICs divide a TTL clock signal by 1.5. By following the circuit with another flip/flop, you could also generate a divide by three function.
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  • DARKROOM CAMERA SHUTTER TIMER
    This circuit was designed to control a film exposure shutter for a darkroom. It has 8 time steps ranging from 0.35 seconds to 4 seconds. It is activated by a foot switch and draws power from an external 12 volt DC supply.

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