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Photography Circuits Last Updated on:
Monday, October 03, 2011 06:07 PM
Circuits Designed
by Dave Johnson, P.E. :
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.
Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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.... [Designed by David A. Johnson]
Lightning Activated Camera Shutter Trigger - This circuit is used to
trigger a camera's electronic shutter circuit when a flash of lightning is
present. This circuit would also work for photographing fireworks displays
or other events involving flashes of light…. [G. Forrest Cook]
Lightning Detectors - The following circuit is an improved version of my
original Lightning Detector designed to run on a 5 volt supply....(circuit added
05/05/05)
