Thread: why 12V?
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Old March 7th 17, 09:21 PM posted to uk.tech.digital-tv
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Default why 12V?

"Bill Wright" wrote in message
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So many things run on 12V DC. Firstly, why has that become the standard?
Is it all because of the nominal voltage of a car battery?


I would imagine so. 12V can easily be made out of six 2V lead-acid cells
(for a car) or eight 1.5V batteries (for a portable radio etc).

I'm not sure how 5V became the standard for USB power.