Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 26,000+ electronic circuits or schematics carefully
cross-referenced into 500+ categories.   As a vital resource for engineers,
hobbyists, inventors & consultants, the site's collection of information
will help you find quick solutions to electronic design problems.

 

Web www.discovercircuits.com

HOME Schematics Discover Forum Hobby Corner Dave's Circuits Electronic Resources Book Corner Contact Info

Photography Circuits
Last Updated on: Friday, April 25, 2008 04:34 AM
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, schematics, or diagrams for engineers, hobbyists, students & inventors:

741 Based Light Sensor:  CdS photocell used for light/dark controlled relay (Electronic circuit added 5/02)

Casio QV 200 Digital Camera Cable: Lose your cable? Build it yourself and save $29. Fits many QV models. (Electronic circuit added 7/03)

Lightning Activated Camera Shutter Trigger: (Electronic Schematic / circuit added 4/02)

Copyright  2002 - 2008 David A. Johnson & Associates.  All Rights Reserved to the contents & graphics of Discovercircuits.com
Linking is welcomed but COPYING any content or graphics to your server is expressly prohibited.