Message-ID:

Using TSO is like kicking a dead whale down the beach. -- S. C. Johnson

computers / comp.sys.raspberry-pi / Re: USB C power supply for Pi2?

USB C power supply for Pi2?

<timnvc$3pait$2@dont-email.me>

https://www.rocksolidbbs.com/computers/article-flat.php?id=6012&group=comp.sys.raspberry-pi#6012

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: bp@www.zefox.net (bob prohaska)
Newsgroups: comp.sys.raspberry-pi
Subject: USB C power supply for Pi2?
Date: Tue, 18 Oct 2022 17:32:28 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 16
Message-ID: <timnvc$3pait$2@dont-email.me>
Injection-Date: Tue, 18 Oct 2022 17:32:28 -0000 (UTC)
Injection-Info: reader01.eternal-september.org; posting-host="4258357b94ee71b70ca8e7acd0aa84f2";
logging-data="3975773"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX184hWE9YCMNmS2uoDZHcD8wU5TFuu5QOf0="
Summary: Will a USB C power supply fry a Pi2?
Keywords: Pi2 usb c
User-Agent: tin/2.4.4-20191224 ("Millburn") (FreeBSD/12.3-STABLE (arm))
Cancel-Lock: sha1:8N82lNodotOdGR1POMTT5AdHZP4=

by: bob prohaska - Tue, 18 Oct 2022 17:32 UTC

It turns out my Pi2 problems were yet another dying power supply.

I can easily splice the old power cord onto a new wallwart, but
wonder if it's possible to use a USB C adapter that might remain
useful after the Pi2 is obsolete.

AIUI USB C power supplies can deliver up to 20 volts after negotiating
with the load. Less clear is how the negotiating is done and what happens
if a C power supply is connected to a Pi2 which can't negotiate.

Anybody tried it?

Thanks for reading,

bob prohaska

Re: USB C power supply for Pi2?

<timp72$3lqh4$1@dont-email.me>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6015&group=comp.sys.raspberry-pi#6015

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!aioe.org!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: david-taylor@blueyonder.co.uk.invalid (David Taylor)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Tue, 18 Oct 2022 18:53:38 +0100
Organization: A noiseless patient Spider
Lines: 28
Message-ID: <timp72$3lqh4$1@dont-email.me>
References: <timnvc$3pait$2@dont-email.me>
Reply-To: david-taylor@blueyonder.co.uk
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Tue, 18 Oct 2022 17:53:38 -0000 (UTC)
Injection-Info: reader01.eternal-september.org; posting-host="7e661f55940b1469cdee05e742aab2a8";
logging-data="3861028"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19BJJyP0u2OFoNjOYerYQ0F94uHVl3zh/g="
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101
Thunderbird/102.3.3
Cancel-Lock: sha1:cWujWRCPu0ljG8aEd0Gz6ASXFWU=
In-Reply-To: <timnvc$3pait$2@dont-email.me>
Content-Language: en-GB

by: David Taylor - Tue, 18 Oct 2022 17:53 UTC

On 18/10/2022 18:32, bob prohaska wrote:
> It turns out my Pi2 problems were yet another dying power supply.
>
> I can easily splice the old power cord onto a new wallwart, but
> wonder if it's possible to use a USB C adapter that might remain
> useful after the Pi2 is obsolete.
>
> AIUI USB C power supplies can deliver up to 20 volts after negotiating
> with the load. Less clear is how the negotiating is done and what happens
> if a C power supply is connected to a Pi2 which can't negotiate.
>
> Anybody tried it?
>
> Thanks for reading,
>
> bob prohaska

Bob,

I've been going for power supplies which say they are 5V, such as the official
RPi-4 USB-C ones. No mention there of having the higher-voltage options.
Beware of xPhone "compatible" ones.

--
Cheers,
David
Web: https://www.satsignal.eu

Re: USB C power supply for Pi2?

<9eb76f395a.DaveMeUK@BeagleBoard-xM>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6016&group=comp.sys.raspberry-pi#6016

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!aioe.org!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: dave@davehigton.me.uk (David Higton)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Tue, 18 Oct 2022 19:33:14 +0100
Organization: Home
Lines: 13
Message-ID: <9eb76f395a.DaveMeUK@BeagleBoard-xM>
References: <timnvc$3pait$2@dont-email.me>
Injection-Info: reader01.eternal-september.org; posting-host="be800b98c93646d488baffff76c2644b";
logging-data="3994631"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19j18QxxUy8y2VNN6B9ING2PZvfQg78kvg="
User-Agent: Messenger-Pro/8.03 (MsgServe/8.01) (RISC-OS/5.29) NewsHound/v1.54
Cancel-Lock: sha1:OoXDscqvLGiepMruwPk+Mmqeo4I=

by: David Higton - Tue, 18 Oct 2022 18:33 UTC

In message <timnvc$3pait$2@dont-email.me>
bob prohaska <bp@www.zefox.net> wrote:

> It turns out my Pi2 problems were yet another dying power supply.
>
> I can easily splice the old power cord onto a new wallwart, but wonder if
> it's possible to use a USB C adapter that might remain useful after the
> Pi2 is obsolete.

A USB charger is not intended to run 24/365. Depending on how much you
run your Pi2, you may find you're better off with a proper power supply.

David

Re: USB C power supply for Pi2?

<timtp6$3q3ei$1@dont-email.me>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6017&group=comp.sys.raspberry-pi#6017

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!aioe.org!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: deloptes@gmail.com (Deloptes)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Tue, 18 Oct 2022 21:11:34 +0200
Organization: A noiseless patient Spider
Lines: 12
Message-ID: <timtp6$3q3ei$1@dont-email.me>
References: <timnvc$3pait$2@dont-email.me> <9eb76f395a.DaveMeUK@BeagleBoard-xM>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8Bit
Injection-Info: reader01.eternal-september.org; posting-host="4b3e9c28da17f61fbec37b4621f9af7e";
logging-data="4001234"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+T3ESQW6dz9uS9LUYz59cx03DbrkRyLs8="
User-Agent: KNode/0.10.9
Cancel-Lock: sha1:HB3IOerUyT600HyGurfTiQWg5UY=
X-Face: &bB+dG6r\D$gd^NFeYm<f{n8m&2W,Lr'h>#MNOHtI/(z<->Su~)mL1rYXAE7W:U2d;tQAEP ?3('tC@:iV_x)~3Kq.-X\\j1HU;i6/u\An"y=\gO%d`v#QdRgaw9JySH|xOp&6giT2q+z3j<t`[9@b _&-<C%rE*@-)n9uI5?P_u9`8x.@SeM*h,'bBR~v^^XiU[Y&\/L6(jEpen8eNtlhu!p)GYOW6Iny

by: Deloptes - Tue, 18 Oct 2022 19:11 UTC

David Higton wrote:

> A USB charger is not intended to run 24/365. Depending on how much you
> run your Pi2, you may find you're better off with a proper power supply.

Can you point out to sources for this statement, please? Why shouldn't a
charger run 24/7?
I am now testing one Orange Pi with Vivanco usb charger and I was just
wondering if it is OK to use the charger 24/7. It is one that provides 12W
and the machine runs presumable on 1/3 of it.

thanks

Re: USB C power supply for Pi2?

<181020221529088579%nospam@nospam.invalid>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6018&group=comp.sys.raspberry-pi#6018

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!aioe.org!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: nospam@nospam.invalid (nospam)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Tue, 18 Oct 2022 15:29:08 -0400
Organization: A noiseless patient Spider
Lines: 11
Message-ID: <181020221529088579%nospam@nospam.invalid>
References: <timnvc$3pait$2@dont-email.me> <9eb76f395a.DaveMeUK@BeagleBoard-xM>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
Injection-Info: reader01.eternal-september.org; posting-host="f698452039e3df1ec20ebfcfae1cc832";
logging-data="4003086"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19Xz+l+ChZt+GaOAv9aLrtx"
User-Agent: Thoth/1.9.0 (Mac OS X)
Cancel-Lock: sha1:f6cb3iOBV/nnxK8HxUQmBeFcNNE=

by: nospam - Tue, 18 Oct 2022 19:29 UTC

In article <9eb76f395a.DaveMeUK@BeagleBoard-xM>, David Higton
<dave@davehigton.me.uk> wrote:

> A USB charger is not intended to run 24/365.

yes they are.

> Depending on how much you
> run your Pi2, you may find you're better off with a proper power supply.

usb chargers are proper, except perhaps noname junk that's best avoided.

Re: USB C power supply for Pi2?

<tin0vf$3nve5$4@dont-email.me>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6019&group=comp.sys.raspberry-pi#6019

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!aioe.org!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: martin@mydomain.invalid (Martin Gregorie)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Tue, 18 Oct 2022 20:06:07 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 43
Message-ID: <tin0vf$3nve5$4@dont-email.me>
References: <timnvc$3pait$2@dont-email.me>
<9eb76f395a.DaveMeUK@BeagleBoard-xM>
<181020221529088579%nospam@nospam.invalid>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Injection-Date: Tue, 18 Oct 2022 20:06:07 -0000 (UTC)
Injection-Info: reader01.eternal-september.org; posting-host="e9377212bdd2d35447cb81ecc92e9c92";
logging-data="3931589"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18A4zvh8paVVuEcRDNLGjsCvCSAhYUsqN0="
User-Agent: Pan/0.149 (Bellevue; 4c157ba git@gitlab.gnome.org:GNOME/pan.git)
Cancel-Lock: sha1:dUDUJp/lPOqBc1Z8teJcC3uK4to=

by: Martin Gregorie - Tue, 18 Oct 2022 20:06 UTC

On Tue, 18 Oct 2022 15:29:08 -0400, nospam wrote:

> In article <9eb76f395a.DaveMeUK@BeagleBoard-xM>, David Higton
> <dave@davehigton.me.uk> wrote:
>
>> A USB charger is not intended to run 24/365.
>
There are actually three classes of 'PSU's, all designed for different use
cases:

1) *battery charger*, which is designed for intermittent use, typically
it is only in use for a small fraction of its duty cycle. That's
because its job is to top off the battery it's attached to and then
set its 'charge complete' indicator and shut down.
It is NOT designed for continuous operation.

2) *PSU*, USB or not. These are designed to run 24/7, but offer no
protection against mains failure

3) 'uninterruptable power supply', which is designed to keep its load
powered regardless of interruptions of its power source, though the
length of time it can provide power will be specified. Longer costs
more.
It pays to think about which of those classes you actually want before
installing anything: picking the wrong type for your application is likely
to be unsatisfactory. And be careful to over-specify rather then under-
specify your power source as well as considering its use case because that
will extend its life.

> Depending on how much you run your Pi2, you may find you're better off
> with a proper power supply.

Spot on. There's a fourth case too: the 'piece of crap'. Avoid at all
costs.

Martin | martin at
Gregorie | gregorie dot org

Re: USB C power supply for Pi2?

<brd32j-5f2s1.ln1@esprimo.zbmc.eu>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6020&group=comp.sys.raspberry-pi#6020

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!news.swapon.de!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: cl@isbd.net (Chris Green)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Tue, 18 Oct 2022 21:10:51 +0100
Lines: 22
Message-ID: <brd32j-5f2s1.ln1@esprimo.zbmc.eu>
References: <timnvc$3pait$2@dont-email.me>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-Trace: individual.net MRG3zDbbhY2yeLTZGRR41AVjUd6HrjaSnI7WFhrtrVxPpakrY=
X-Orig-Path: not-for-mail
Cancel-Lock: sha1:20UQC1Q1Qsms6NvN1c+kPNKJJ9Q=
User-Agent: tin/2.6.2-20220130 ("Convalmore") (Linux/5.15.0-48-generic (x86_64))

by: Chris Green - Tue, 18 Oct 2022 20:10 UTC

bob prohaska <bp@www.zefox.net> wrote:
> It turns out my Pi2 problems were yet another dying power supply.
>
> I can easily splice the old power cord onto a new wallwart, but
> wonder if it's possible to use a USB C adapter that might remain
> useful after the Pi2 is obsolete.
>
> AIUI USB C power supplies can deliver up to 20 volts after negotiating
> with the load. Less clear is how the negotiating is done and what happens
> if a C power supply is connected to a Pi2 which can't negotiate.
>
The USB-C power interface is a total can of worms IMHO, it is far, far
too complex and the chances of buying a supply that implements it
completely or properly are minimal.

Anything that uses much more than the extra current available at 5
volts probably needs to be specific to the device manufacturer to be
safe.

--
Chris Green
·

Re: USB C power supply for Pi2?

<tinl4o$3up4k$1@dont-email.me>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6022&group=comp.sys.raspberry-pi#6022

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!aioe.org!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: alexandre@dumas.fr.invalid (A. Dumas)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Wed, 19 Oct 2022 01:50:16 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 6
Message-ID: <tinl4o$3up4k$1@dont-email.me>
References: <timnvc$3pait$2@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Injection-Date: Wed, 19 Oct 2022 01:50:16 -0000 (UTC)
Injection-Info: reader01.eternal-september.org; posting-host="718c034a84b22160b64db05b642d19b8";
logging-data="4154516"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/fr4pQTKRmHMwBCYeOOSESbzDS5l8FZ4o="
User-Agent: NewsTap/5.5 (iPad)
Cancel-Lock: sha1:G8TyfeeNF/w43/rUB5q1czF7lTA=
sha1:eJSkBgUS+72+98sSIYyeaMBBeq0=

by: A. Dumas - Wed, 19 Oct 2022 01:50 UTC

bob prohaska <bp@www.zefox.net> wrote:
> It turns out my Pi2 problems were yet another dying power supply.

Just get the effing official power supply already. Maybe it's $2 more but
that is definitely worth it.

Re: USB C power supply for Pi2?

<tio2uj$3vnb0$1@dont-email.me>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6024&group=comp.sys.raspberry-pi#6024

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: deloptes@gmail.com (Deloptes)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Wed, 19 Oct 2022 07:45:55 +0200
Organization: A noiseless patient Spider
Lines: 13
Message-ID: <tio2uj$3vnb0$1@dont-email.me>
References: <timnvc$3pait$2@dont-email.me> <brd32j-5f2s1.ln1@esprimo.zbmc.eu>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7Bit
Injection-Info: reader01.eternal-september.org; posting-host="7c1ad7f927e7b93cd75c6cf61100c819";
logging-data="4185440"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19H9p07d/L/H4CZTwmzWKy7P0PqSzN7d2g="
User-Agent: KNode/0.10.9
Cancel-Lock: sha1:90GO0v7EcIdahQwERuyQnfTxPDc=
X-Face: &bB+dG6r\D$gd^NFeYm<f{n8m&2W,Lr'h>#MNOHtI/(z<->Su~)mL1rYXAE7W:U2d;tQAEP ?3('tC@:iV_x)~3Kq.-X\\j1HU;i6/u\An"y=\gO%d`v#QdRgaw9JySH|xOp&6giT2q+z3j<t`[9@b _&-<C%rE*@-)n9uI5?P_u9`8x.@SeM*h,'bBR~v^^XiU[Y&\/L6(jEpen8eNtlhu!p)GYOW6Iny

by: Deloptes - Wed, 19 Oct 2022 05:45 UTC

Chris Green wrote:

> The USB-C power interface is a total can of worms IMHO, it is far, far
> too complex and the chances of buying a supply that implements it
> completely or properly are minimal.
>

what about the micro-USB?

Also what about using only the +5V and negative (red/black) - what kind of
negotiations are you talking about?!

Re: USB C power supply for Pi2?

<20221019065629.5b0f15057d52a8d8775a6bab@eircom.net>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6026&group=comp.sys.raspberry-pi#6026

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!rocksolid2!i2pn.org!news.swapon.de!news.mixmin.net!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: steveo@eircom.net (Ahem A Rivet's Shot)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Wed, 19 Oct 2022 06:56:29 +0100
Organization: A noiseless patient Spider
Lines: 15
Message-ID: <20221019065629.5b0f15057d52a8d8775a6bab@eircom.net>
References: <timnvc$3pait$2@dont-email.me>
<brd32j-5f2s1.ln1@esprimo.zbmc.eu>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Injection-Info: reader01.eternal-september.org; posting-host="8018c5305c0d28e2da6cb3f95cb1269d";
logging-data="4186807"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19S/HM+ZL1J49Me0eBYu6GmZyR0r+w1zQQ="
Cancel-Lock: sha1:4sTvOOcEGQfp5mozfwKdiFTZulI=
X-Clacks-Overhead: "GNU Terry Pratchett"
X-Newsreader: Sylpheed 3.7.0 (GTK+ 2.24.33; amd64-portbld-freebsd13.0)

by: Ahem A Rivet's - Wed, 19 Oct 2022 05:56 UTC

On Tue, 18 Oct 2022 21:10:51 +0100
Chris Green <cl@isbd.net> wrote:

> The USB-C power interface is a total can of worms IMHO, it is far, far
> too complex and the chances of buying a supply that implements it
> completely or properly are minimal.

The chip makers are all over this - there will undoubtedly be a few
bad ones but they should fall out of use pretty quickly or get fixed. WiFi
and Bluetooth are *way* more complex but all a manufacturer has to do to
get it right is use a decent chip.

--
Steve O'Hara-Smith
Odds and Ends at http://www.sohara.org/

Re: USB C power supply for Pi2?

<jll42j-nhru1.ln1@esprimo.zbmc.eu>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6029&group=comp.sys.raspberry-pi#6029

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!news.swapon.de!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: cl@isbd.net (Chris Green)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Wed, 19 Oct 2022 08:30:27 +0100
Lines: 27
Message-ID: <jll42j-nhru1.ln1@esprimo.zbmc.eu>
References: <timnvc$3pait$2@dont-email.me> <brd32j-5f2s1.ln1@esprimo.zbmc.eu> <tio2uj$3vnb0$1@dont-email.me>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-Trace: individual.net VeYr2pvjTKFbz4ItsXq5tAyWTnDySNJ+FS8ucNwJtPYGfcWnI=
X-Orig-Path: not-for-mail
Cancel-Lock: sha1:BuYCCewBx1WZnJ6EAE5idajyd4M=
User-Agent: tin/2.6.2-20220130 ("Convalmore") (Linux/5.15.0-48-generic (x86_64))

by: Chris Green - Wed, 19 Oct 2022 07:30 UTC

Deloptes <deloptes@gmail.com> wrote:
> Chris Green wrote:
>
> > The USB-C power interface is a total can of worms IMHO, it is far, far
> > too complex and the chances of buying a supply that implements it
> > completely or properly are minimal.
> >
>
> what about the micro-USB?
>
The 'old' micro-USB is fairly straightforward, usually. I think there
are some possible extras but basically the only real 'extra' is the
availability of more current from some PSUs.

> Also what about using only the +5V and negative (red/black) - what kind of
> negotiations are you talking about?!
>
On USB-C the source and client can 'negotiate' all sorts of changes to
the basic 5 volt supply, it can be negotiated up to 12 volts or even
20 volts. The 'negotiation' comprises signals on the other pins of
the connector so (as far as I understand it) if you only connect to
the 0v and +ve supply pins you should only ever get 5 volts.

--
Chris Green
·

Re: USB C power supply for Pi2?

<pp60lh5nvnjfhl94vmjhlnv6n204ubc333@dim53.demon.nl>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6036&group=comp.sys.raspberry-pi#6036

copy link Newsgroups: comp.sys.raspberry-pi

From: k.nuyt@nospam.demon.nl (Kees Nuyt)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Wed, 19 Oct 2022 17:48:34 +0200
Reply-To: k.nuyt@nospam.demon.nl
Message-ID: <pp60lh5nvnjfhl94vmjhlnv6n204ubc333@dim53.demon.nl>
References: <timnvc$3pait$2@dont-email.me> <9eb76f395a.DaveMeUK@BeagleBoard-xM> <181020221529088579%nospam@nospam.invalid> <tin0vf$3nve5$4@dont-email.me>
User-Agent: ForteAgent/7.10.32.1214
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Organization: KPN B.V.
Path: i2pn2.org!i2pn.org!weretis.net!feeder8.news.weretis.net!newsreader4.netcologne.de!news.netcologne.de!peer01.ams1!peer.ams1.xlned.com!news.xlned.com!peer01.ams4!peer.am4.highwinds-media.com!news.highwinds-media.com!feed.abavia.com!abe006.abavia.com!abp001.abavia.com!news.kpn.nl!not-for-mail
Lines: 24
Injection-Date: Wed, 19 Oct 2022 17:48:36 +0200
Injection-Info: news.kpn.nl; mail-complaints-to="abuse@kpn.com"
X-Received-Bytes: 1784

by: Kees Nuyt - Wed, 19 Oct 2022 15:48 UTC

On Tue, 18 Oct 2022 20:06:07 -0000 (UTC), Martin Gregorie
<martin@mydomain.invalid> wrote:

>There are actually three classes of 'PSU's, all designed for different use
>cases:
>
>1) *battery charger*, which is designed for intermittent use, typically
> it is only in use for a small fraction of its duty cycle. That's
> because its job is to top off the battery it's attached to and then
> set its 'charge complete' indicator and shut down.
> It is NOT designed for continuous operation.

Many of these can negotiate with the device they are charging to
supply a higher voltage / current.

>2) *PSU*, USB or not. These are designed to run 24/7, but offer no
> protection against mains failure

They are supposed to deliver a fixed voltage. No negotiation.
The device determines how much current it will pull at any
moment, up to a PSU specific maximum current.
--
Kees Nuyt

Re: USB C power supply for Pi2?

<jrf0t1Fivc9U1@mid.individual.net>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6049&group=comp.sys.raspberry-pi#6049

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!aioe.org!news.mixmin.net!news2.arglkargh.de!news.karotte.org!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: usenet@andyburns.uk (Andy Burns)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Fri, 21 Oct 2022 08:43:19 +0100
Lines: 7
Message-ID: <jrf0t1Fivc9U1@mid.individual.net>
References: <timnvc$3pait$2@dont-email.me> <brd32j-5f2s1.ln1@esprimo.zbmc.eu>
<tio2uj$3vnb0$1@dont-email.me> <jll42j-nhru1.ln1@esprimo.zbmc.eu>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: individual.net KwWJ7tWxEDHcKjmxsIu2LgkOYa2oEcDHlJmNMK+FSjzLHumqxu
Cancel-Lock: sha1:mLV6VpGP6Q3W41C151TNYG1d/34=
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101
Thunderbird/102.4.0
Content-Language: en-GB
In-Reply-To: <jll42j-nhru1.ln1@esprimo.zbmc.eu>

by: Andy Burns - Fri, 21 Oct 2022 07:43 UTC

Chris Green wrote:

> On USB-C the source and client can 'negotiate' all sorts of changes to
> the basic 5 volt supply, it can be negotiated up to 12 volts or even
> 20 volts.

Latest USB PD spec allows 48V @ 5A

Re: USB C power supply for Pi2?

<20221021104346.f86fc412b14a7fd5e4b69b43@eircom.net>

copy mid

https://www.rocksolidbbs.com/computers/article-flat.php?id=6051&group=comp.sys.raspberry-pi#6051

copy link Newsgroups: comp.sys.raspberry-pi

Path: i2pn2.org!i2pn.org!aioe.org!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: steveo@eircom.net (Ahem A Rivet's Shot)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: USB C power supply for Pi2?
Date: Fri, 21 Oct 2022 10:43:46 +0100
Organization: A noiseless patient Spider
Lines: 10
Message-ID: <20221021104346.f86fc412b14a7fd5e4b69b43@eircom.net>
References: <timnvc$3pait$2@dont-email.me>
<brd32j-5f2s1.ln1@esprimo.zbmc.eu>
<tio2uj$3vnb0$1@dont-email.me>
<jll42j-nhru1.ln1@esprimo.zbmc.eu>
<jrf0t1Fivc9U1@mid.individual.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Injection-Info: reader01.eternal-september.org; posting-host="04b576b801cb8ad255b80856746d17d0";
logging-data="651290"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18kVUyNx+6FieJTGTAuKrrxr8gobzZIDW0="
Cancel-Lock: sha1:ZYYyw01aWPXmetxvNsejkOScBfY=
X-Newsreader: Sylpheed 3.7.0 (GTK+ 2.24.33; amd64-portbld-freebsd13.0)
X-Clacks-Overhead: "GNU Terry Pratchett"

by: Ahem A Rivet's - Fri, 21 Oct 2022 09:43 UTC

On Fri, 21 Oct 2022 08:43:19 +0100
Andy Burns <usenet@andyburns.uk> wrote:

> Latest USB PD spec allows 48V @ 5A

Nice cheap, warm cables.

--
Steve O'Hara-Smith
Odds and Ends at http://www.sohara.org/

Subject	Author
USB C power supply for Pi2?	bob prohaska
Re: USB C power supply for Pi2?	David Taylor
Re: USB C power supply for Pi2?	David Higton
Re: USB C power supply for Pi2?	Deloptes
Re: USB C power supply for Pi2?	nospam
Re: USB C power supply for Pi2?	Martin Gregorie
Re: USB C power supply for Pi2?	Kees Nuyt
Re: USB C power supply for Pi2?	Chris Green
Re: USB C power supply for Pi2?	Deloptes
Re: USB C power supply for Pi2?	Chris Green
Re: USB C power supply for Pi2?	Andy Burns
Re: USB C power supply for Pi2?	Ahem A Rivet's Shot
Re: USB C power supply for Pi2?	Ahem A Rivet's Shot
Re: USB C power supply for Pi2?	A. Dumas