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If you purchase an independently reviewed product or service through a link on our website, Rolling Stone may receive an affiliate commission. When heavy storms, earthquakes, and other disasters ...

A solar generator’s capacity is measured in watt-hours, and it can give you an idea of how long you can power devices. Higher-powered devices eat up more capacity, thus draining the battery faster.

A decent signal generator is handy for tuning electronic projects. [SC] sent in this AVR signal generator. The parts count is really, really low. An ATMega8 is the core, and a shift register runs the ...