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Old 02-06-2010, 11:27 AM
Lionclaw's Avatar
Lionclaw Lionclaw is offline
Join Date: Sep 2007
Location: Dayton, OH
Posts: 652
Default USB Power Plugs?

I have usb chargers for my gps, cell phone, and PDA. It'd be nice to have charging ports that aren't attached to big 12v accessory adapters. Has anyone tried to mount a powered usb hub or other product to power usb devices?
Andy Compton
RV-10 - N432AC (building)
RV-9A - N643AC (built,flying,sold,missed)
My blood and sweat, the Wifey's tears
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Old 02-06-2010, 02:44 PM
sjjonesnz sjjonesnz is offline
Join Date: Mar 2007
Location: Auckland, NZ
Posts: 140

I've got a 12v cigarette lighter socket, and a belkin auto charger ...

Works really well
Auckland, New Zealand

Flying RV-7QB/ZK-NVS/Aerosport 0320/Dual AF3500s/PMA8000B/GNS430W/SL30/GTX327/TT ADIP II
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Old 02-06-2010, 02:59 PM
nucleus nucleus is offline
Join Date: Sep 2006
Location: Bozeman, Montana
Posts: 857
Default GRT?

I wonder if the USB ports on the Grands Rapids EFII would do it. Don't see why not.

Dr. Hans Conser
Bozeman Chiropractor
RV-6A 195 Hours, up for sale soon?
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Old 02-06-2010, 03:59 PM
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Jamie Jamie is offline
Join Date: Jan 2005
Location: Atlanta, GA
Posts: 2,293

Certainly not a bad idea, although I just use a usb charger in my cigar lighter socket and it works fine. I say "use" but what I really mean is "once used". Yeah, I haven't charged that much with it.

If I were to do it again, I maybe would put a cigar light outlet between the seats. That seems to be the common gathering spot for things like cell phones, handheld radios, etc.
"What kind of man would live where there is no daring? I don't believe in taking foolish chances but nothing can be accomplished without taking any chance at all." - Charles A. Lindbergh
Jamie | RV-7A First Flight: 7/27/2007 (Sold)
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Old 02-06-2010, 08:55 PM
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DCat22 DCat22 is offline
Join Date: May 2009
Location: Houston, TX
Posts: 528

If you wanted to panel (or elsewhere) mount it, you could a jack like this, and the run an internal cable to a powered hub. (Or build the power part yourself...somewhat like this and this.)

Also, a decent "industrial" USB hub that runs off 12-24V if you wanted to actually be able to use the USB port for more than power, etc. (Of course, breaking down a car USB charger would work just as well for just power.)
-Rick Greer, VAF #2492

Last edited by DCat22 : 02-06-2010 at 09:03 PM.
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Old 02-07-2010, 10:46 AM
topgun260 topgun260 is offline
Join Date: Sep 2006
Posts: 47
Default Build Your Own

Panel mount USB jacks are available here.

The power provided via USB is 5vdc @ 500ma.

You can either buy or build a circuit to drop 12vdc to 5vdc.

Something like this would work if you didn't want to build a circuit.

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Old 02-08-2010, 09:48 AM
Steve Steve is offline
Join Date: Jan 2005
Location: Roy, Utah
Posts: 1,068

I noticed my local AutoZone stocks an adapter with 3 12v holes and 1 USB port. I don't know for sure if the device has circuitry to step the 12v down to 5v for the usb port. Cost is $18.00.
Five Sierra Fox
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Old 08-13-2010, 11:20 AM
monsoon monsoon is offline
Join Date: Aug 2010
Location: KFDK
Posts: 2
Default Panel Mounted USBs in a Cessna172

Does anyone know if an STC is required to panel mount a bank of USB power outlets in a 172? (C172SP with G1000.) We usually have 2 iPhones (5V, 1A draw), an iPad (5V, 2.1A draw) and a hand-held ICOM radio (? draw) on board. The iPad gets a lot of use due to the ForeFlight app and we're always swapping cords back and forth to juice up the iPhones or ICOM before landing. It'd be nice to just plug them all in and forget them.

I envision at least 3 USBs banked together and labeled 5V OUT (with some smarts to the circuit that will give proper amperage based on the device plugged in to it) and 1 traditional barrel type 12V OUT socket. I'd also be willing to build something between the seats if this gets around a required STC.

Note: The iPad wants 10W (5V, 2.1A) to charge quickly. Anything less takes forever to charge this thing up... as much as 8 hours if only given 1A.

The link to the L-Com sight was nice to see. This place has a ton of connectors that you're hard pressed to find anywhere else. I've used them for all sorts of things in the past. Especially nice for home theater builds.
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Old 08-13-2010, 01:28 PM
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DakotaHawk DakotaHawk is offline
Join Date: Oct 2008
Location: Arlington, WA
Posts: 711
Default Source for 5VDC

The power provided via USB is 5vdc @ 500ma.
Pin #18 on the 37 pin DB on the Dynon D10 EMS is regulated 5V dc. The installation guide says that provisions should be made to connect this output to several devices such as engine manifold pressure sensor, etc. This would be a good source for the USB power port.

Wiring diagram shows location of 5V+ to VCC.

edit: Dynon Support says (in a later post on this thread)
The 5V out on a Dynon EMS cannot do the 500mA that most USB devices want. Please don't do that
Scott "Grumpy" Stewart
RV-7 N957RV (First Flight on Dec 18, 2009)
RV-14 N144P (Empennage complete, building wings)
#866 on the Van's RV-7 hobbs
#6563 on Van's generic hobbs
Arlington, WA

Last edited by DakotaHawk : 08-13-2010 at 04:52 PM. Reason: Added quote from Dynon Support
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Old 08-13-2010, 02:44 PM
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647jc 647jc is offline
Join Date: May 2006
Location: Ankeny, Iowa
Posts: 434

I don't think using the DYNON 5 volt excitation voltage as a USB power source would be a very good idea. The purpose of this voltage is to excite sensors that require excitation and this typically is a very low current circuit. I seriously doubt if this 5 volt source would be able to provide enough current to charge devices via a USB connection. Trying to do so may also damage the DYNON instrument and/or cause invalid or erratic engine sensor readings.
Joe Condon
Ankeny, Iowa
RV9A - 647JC - 300 hrs - SOLD 6/23/15
OneX - Under Construction - For Sale
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