 USB charging, Thinking about adding 5volts |
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| worn |
 Dec 9 2015, 07:39 PM
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Winner of the Utah Twisted Joint Award  Group: Members Posts: 3,560 Joined: 3-June 11 From: Madison, WI and North Bend WA Member No.: 13,152 Region Association: Upper MidWest 
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I got a bunch of USB sockets and voltage regulator ICs that will trim 12v to 5v, and thought it would be nice to wire in for charging phones etc. someone suggested that the ICs would fry due to transients. So I am wondering about wiring zener diodes as shunts across the feed and wanted to know what you thought. I am especially interested in voltage and wattage for the zener and perhaps resistance to limit current. Thanks!
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| Mark Henry |
Dec 12 2015, 12:32 AM
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
If you're willing to wait a month on shipping, you can get a buck for a buck, delivered from China.
http://www.ebay.com/itm/6-24V-12V-24V-To-5...-4AAOSwKIpWC0gl |
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Posts in this topic
worn USB charging Dec 9 2015, 07:39 PM
Mike Bellis
I got a bunch of USB sockets and voltage regulato... Dec 9 2015, 08:06 PM McMark Just buy a cigarette light USB, cut it open and ta... Dec 9 2015, 08:19 PM stugray What McMark said.
I just bought a female cigarett... Dec 9 2015, 08:28 PM
worn
What McMark said.
I just bought a female cigaret... Dec 10 2015, 11:06 AM Steve How many do you need? My stereo has one in it and... Dec 10 2015, 11:10 AM GregAmy $8 shipped.
http://www.amazon.com/Outlet-Cha... Dec 10 2015, 11:24 AM worn
$8 shipped.
http://www.amazon.com/Outlet-Ch... Dec 10 2015, 11:47 AM Steve Pratel
$8 shipped.
http://www.amazon.com/Outlet-Ch... Dec 11 2015, 08:55 AM stugray The 7805 should work fine in this car as long as y... Dec 10 2015, 12:51 PM worn
The 7805 should work fine in this car as long as ... Dec 10 2015, 01:54 PM stugray The audiophiles THINK the ultra capacitors help th... Dec 10 2015, 03:52 PM Spoke The ready-to-go solutions noted are the easiest wa... Dec 11 2015, 12:07 PM stugray
The Ultra caps should only be used to provide ins... Dec 11 2015, 03:43 PM Spoke
The Ultra caps should only be used to provide in... Dec 11 2015, 03:56 PM worn
If you're willing to wait a month on shipping... Dec 16 2015, 01:18 PM |
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