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 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.

 
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DiscoverCircuits.com  --   Hobby Corner
 Last Updated on:  03/19/2008 06:54:11 AM

 

 

 
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 got closer to an object. Being a cheap person, I didn’t want to spend money on an expensive close-up lens. Instead, I found a 1.75” glass lens with a focal length of about 2.5 inches. I glued the lens to a cardboard tube. This allowed the assembly to slide over the extended cylindrical lens of my camera, holding the glass lens over the camera lens. Thicker glass lenses could be used for higher magnification but this one allowed me to zoom in pretty close. The PC board below is a 1GB memory stick IC with 0.025” pin spacing

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