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Powering Projects from a 1.5V Battery

technoblogy.com

A single AA or AAA battery would be an ideal low-cost power source for a small AVR-based project, but unfortunately they only provide 1.2 to 1.5V, and even the low-voltage versions of the AVR chips need at least a 1.8V supply.

The solution is to use a simple voltage-doubler circuit to step up the voltage. The voltage doubler uses an oscillator to charge up two capacitors through diodes. The voltages across the capacitors are effectively put in series, creating double the supply voltage.

How The Compleat Idiot Become The Technogeek

inventionandtech.com

Having a car was one thing, but delving into its innards with a socket wrench was another altogether—exactly the sort of thing the crewcut-sporting squares back in the suburbs would do. In an age when complex technology was the franchise of big business and the builders of the H-bomb, being good with tools seemed uncool. But Muir’s folksy writing—and the counterculture-friendly art that accompanied it—helped turn the tide in reconciling hippies to technology.