 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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| stugray |
Dec 10 2015, 03:52 PM
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
The audiophiles THINK the ultra capacitors help the audio (I am not convinced).
But putting one in as a transient surge suppressor near the front fuse panel would probably reduce noise to any modern electronics you may have. I would have to experiment with one to be sure. My guess is that the only noticeable effect would be some dash lights would remain on for a few seconds after turning off the ignition. I would just try your idea and see if there is a problem. If you have any trouble, I could throw a 7805 on my car and look at the output with an oscope to see how noisy it is. |
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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 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 Mark Henry If you're willing to wait a month on shipping,... Dec 12 2015, 12:32 AM worn
If you're willing to wait a month on shipping... Dec 16 2015, 01:18 PM |
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