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Photography Circuits
Last Updated on:
Saturday, June 27, 2009 04:43 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. |
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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