KA7OEI's blog

Random musings - usually on a technical (nerdy) subject - perhaps related to amateur radio and things found at ka7oei.com and modulatedlight.org. No AI is used to generate this content.

Friday, July 5, 2013

A "simple, effective, yet inefficient" solar charge controller.

A friend of mine had an immediate need for a way to safely charge a lead-acid battery from a 29 volt solar panel. Because it was the even...

Tuesday, June 18, 2013

Resurrecting a Nikon S8100 from "Lens Error" death (that is, S8100 "Lens Error" fix)

Nikon S8100 "Lens Error" fix A friend of mine came back from vacation and handed me his P&S (which supposedly stands for ...

Friday, June 7, 2013

Long-term observations of NiCd versus NiMH cells and how to make them last longer.

Nickle-Cadmium (NiCd) and Nickle-Metal Hydride (NiMH) cells are ubiquitous, but their behavior in typical consumer items is not at all well ...

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