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  #1  
Old 02-18-2016, 07:27 AM
humptybump humptybump is offline
 
Join Date: Feb 2011
Location: USA
Posts: 3,181
Default The problems with cheap 5v adapters

There have been a few posts regarding the use of the 5V cigarette plug chargers for mobile devices. One issue is that some of these generate interference in radios and other electronics.

The fact is they do.

Some are better made and better filtered than others.

I recently diagnosed an issue that was directly related to a noisy cheap 5V adapter (thankfully not in my airplane).

http://thesalmonfarm.org/blog/p/5790



I still like the convenience and flexibility of using a 5V cigarette plug adapter but I now keep "the good one" in the plane.
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  #2  
Old 02-18-2016, 09:31 AM
krw5927 krw5927 is offline
 
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Location: Wichita, KS
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Default

Very same thing happens in my wife's car. Tire Pressure Monitor System (TPMS) light comes on after a while of using a cheap cigarette lighter adapter. Took quite a while before I figured out what was causing it.
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  #3  
Old 02-18-2016, 09:46 AM
DHeal DHeal is offline
 
Join Date: Sep 2006
Location: Windsor, California
Posts: 1,005
Default

How does one distinguish the good plug-in chargers from the bad?
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  #4  
Old 02-18-2016, 10:01 AM
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Bill Boyd Bill Boyd is offline
 
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Location: Landing field "12VA"
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Default

One plugs them into Glen's car and checks the TPMS light.
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  #5  
Old 02-18-2016, 10:14 AM
Flyingleap Flyingleap is offline
 
Join Date: Nov 2012
Location: Cincinnati,Ohio KHAO
Posts: 146
Default Linear...

Does this mean we have to go back to the "7805" linear regulators instead
of the switchers just to keep noise out of our comms?

John
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  #6  
Old 02-18-2016, 10:36 AM
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N402RH N402RH is offline
 
Join Date: Oct 2005
Posts: 728
Default Quality 5V Chargers

We use these in our panels:

http://www.commitlift.com/

Sometimes you get what you pay for.

Rob Hickman
Advanced Flight Systems Inc.
N402RH RV-10
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  #7  
Old 02-18-2016, 11:54 AM
jj13 jj13 is offline
 
Join Date: Aug 2012
Location: Dunwoody GA (KLZU)
Posts: 62
Default Yep - I had the same problem

So I tried 2 different AUKEY's and both eliminated the noise problem I had with a previous brand.

http://www.amazon.com/gp/product/B00...ilpage_o01_s00
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  #8  
Old 02-18-2016, 06:43 PM
mantry mantry is offline
 
Join Date: May 2014
Location: Bountiful, UT
Posts: 145
Default

Quote:
Originally Posted by N402RH View Post
We use these in our panels:

http://www.commitlift.com/

Sometimes you get what you pay for.

Rob Hickman
Advanced Flight Systems Inc.
N402RH RV-10
I just flew with one of these in my RV7 on Tuesday, powered my iPad Air and charged my iPhone just fine. It is mounted under the panel then the two lightning connectors pass over the SCAT tube for the vent and are stored in the side pocket. WORKS GREAT! I'm happy!!!
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  #9  
Old 02-18-2016, 09:27 PM
brian257 brian257 is offline
 
Join Date: Jun 2013
Location: Jacksonville, FL
Posts: 149
Default

Or install one of these and have two USB charging ports with a total of 4.2A and no interference at all. Full disclosure, these come from my company, but they work and don't have interference problems.

http://aircraftproducts.wicksaircraf...bchg?forward=1

http://www.aircraftspruce.com/catalo...lickkey=264635
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  #10  
Old 02-19-2016, 05:23 AM
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rzbill rzbill is offline
 
Join Date: Nov 2005
Location: Asheville, NC
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Default

Quote:
Originally Posted by DHeal View Post
How does one distinguish the good plug-in chargers from the bad?
Buy from an aviation related or other known source or take your chances.

I was at OSH a couple of years ago and saw a double outlet charger in Sporty's booth that was cheaper than many automotive units I have observed.
Bought it. Works great. It is in their catalog.

Last week I decided to add a permanent USB charger outlet because SWMBO has commandeered the current single 12V outlet. Just ordered from Stein. Do I expect problems from that unit? I don't think so.
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