SELF POWERED DIGITAL METER
The simple circuit described in this article allows your digital meter to be self-powered from the same voltage it measures. This sounds simple and straightforward, right? Unfortunately, it is not.
Build A High Speed Photo Flash Trigger
During the early 1930s Harold “Doc” Edgerton, a faculty member of the Massachusetts Institute of Technology (MIT), started experimenting with strobe lights, better known today as electronic photo flashes.
Build A Ring Flash For Macro Photography
I initially became involved in macro —or close-up photography— as part of my job, which involves failure mode analysis of electronic circuitry. Be sure and read the sidebar for a discussion of why photographs of small objects are called Macro photography. With components becoming smaller and smaller,taking a decent photograph has proven to be increasingly difficult...