Author Topic: Powering a Pi off 12VDC  (Read 668 times)

Offline jhoybs

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Powering a Pi off 12VDC
« on: March 05, 2017, 03:59:57 PM »
I thought I saw a solution to this somewhere, but I can't locate it.  I'd like to power my Pi2/3 from a 12VDC supply inside one of my controller enclosures.  Amazon does list quite a few 12V to 5V buck converters with micro USB plugs, but it appears most of the output current ratings aren't true.

Anybody have a converter that will work?
Jim H.
Muskego, WI
Lynx USB Dongle, Lynx Expresses, Falcon Player, Vixen 3

Offline rlemery

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Re: Powering a Pi off 12VDC
« Reply #1 on: March 05, 2017, 04:18:56 PM »
Unless I'm using a picap I just use the power supply that came with the pi. I already have 110 power for the 12v supply so I just put a three way plug in the box or zip cord with two vampire plugs on one end.

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Offline AAH

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Re: Powering a Pi off 12VDC
« Reply #2 on: March 05, 2017, 05:04:39 PM »
The Murata OKI-78SR-5/1.5 regulator is commonly used on the caps/hats/capes for powering Pi's and BBB's. It's up to 35V in, 5V 1.5A out and is a pseaudo drop in replacement for 78 series linear regulators. They're available from Mouser and lots of other places.
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Offline jnealand

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Re: Powering a Pi off 12VDC
« Reply #3 on: March 05, 2017, 07:53:15 PM »
This is what I use.

https://www.aliexpress.com/item/Charger-DC-Converter-Module-12V-To-5V-3A-15W-with-Micro-USB-Cable-New-YKS/32636589517.html?spm=2114.13010608.0.0.L3OoIt

You can find similar items available from US based vendors but at 3x the price.  Takes about 4 weeks for them to get here from China.  Plan accordingly.  They are cheap enough I ordered more than I needed last year only to expand the show for 2017 and now have a few more on order.  LOL
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Offline lrhorer

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Offline jhoybs

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Re: Powering a Pi off 12VDC
« Reply #5 on: March 07, 2017, 05:00:20 PM »
Thanks everyone!

Offline cjtaylor

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Re: Powering a Pi off 12VDC
« Reply #6 on: April 05, 2017, 10:44:15 PM »

Offline Barnabybear

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Re: Powering a Pi off 12VDC
« Reply #7 on: April 07, 2017, 04:16:32 PM »
Hi, have you thought about a good quality car cigarette lighter 12V to 5V adapter.

Offline andyaz

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Re: Powering a Pi off 12VDC
« Reply #8 on: April 08, 2017, 08:44:53 PM »
I used this last year and it worked great


https://www.amazon.com/DROK-Converter-Regulator-Transformer-Displayer/dp/B016XI9CZQ?th=1


Pick the Female USB+Micro USB version.  $10.99 on Prime.

Offline cjtaylor

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Re: Powering a Pi off 12VDC
« Reply #9 on: April 10, 2017, 10:55:01 PM »
I used one of these last year.  12v in 2 ports out at 5v 4.8 amps each. Plugs into a cigarette lighter outlet or car 12v outlet.


www.amazon.com/gp/product/B0iftcixzm/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1


Offline cjtaylor

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Re: Powering a Pi off 12VDC
« Reply #10 on: April 10, 2017, 11:02:06 PM »
I fat-fingered the url


Scosche usbc242mgd is the part number

Offline lrhorer

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Re: Powering a Pi off 12VDC
« Reply #11 on: April 16, 2017, 11:23:08 AM »
Well, those will certainly work, but they are considerable overkill, cost more, and require more in the way of cable modifications.  This one requires zero modifications: http://www.ebay.com/itm/Micro-USB-Output-DC-Buck-Step-Down-Converter-Module-12V-to-5V-Power-Supply-/262908222815?hash=item3d368d1d5f:g:xqEAAOSwTM5Y0~yF

Personally, I would either go with it or the one I listed above.  The one above has a nice built-in voltmeter and can be used with readily available USB-microUSB cables.

Online Sawdust

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