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Dave's Circuits
Circuits designed by David Johnson, P.E.

Master Category List - Dave's Circuits
 Last Updated on: Sunday, July 27, 2008 07:41 PM

Bistable Multivibrator or Flip/Flop Circuits
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.

Click on Drawing Below to view PDF version of Schematic

Circuit Camera Shutter Timer Circuits designed by David A. Johnson, P.E.

Bistable Multivibrator or Flip/Flop Circuits

Master Schematic Category List - David A. Johnson, P.E.
 

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