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Old 09-10-2012, 10:47 AM   #1
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Default Discussion: Power-supply circuit operates from USB port

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Stefano Palazzolo, Senago, Italy; Edited by Martin Rowe and Fran Granville - EDN Get 1.25V to 3.75V from an adjustable regulator Every PC has a USB (Universal Serial Bus) port that can supply 5V±5% at 500 mA for peripherals. Powered USB hubs also provide this power.
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Old 09-10-2012, 10:47 AM   #2
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What to do with unused pins (D+ and D-)?
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Old 09-11-2012, 12:32 PM   #3
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do not use, for they are only for data. see an example:

http://www.tecnofaisca.com/luminariausb.html
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