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Photography Circuits
Last Updated on:
Friday, December 29, 2017 03:15 AM

Circuits Designed by Dave Johnson, P.E. :
Cheap Close-Up Camera Lens -  I often use my digital camera to take photos of some electronic projects. At times, I need to get in close to capture some details. But, without some additional optics, my camera just could not maintain focus, as I received closer to an object. Being a cheap . . . Hobby Circuit designed by Dave Johnson P.E.-January, 2012

Timer for Darkroom Camera Shutter -  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 . . . Hobby Circuit designed by David Johnson P.E.-June, 2000



Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Casio QV-200 Digital Camera Cable.  -  Lose your cable? Build it yourself and save $29. Fits many QV models. ___

Cheap Close-Up Camera Lens -  I often use my digital camera to take photos of some electronic projects. At times, I need to get in close to capture some details. But, without some additional optics, my camera just could not maintain focus, as I received closer to an object. Being a cheap . . . Hobby Circuit designed by Dave Johnson P.E.-January, 2012

Timer for Darkroom Camera Shutter -  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 . . . Hobby Circuit designed by David Johnson P.E.-June, 2000

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. . . .Designed by G. Forrest Cook

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-368-7747


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