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by arm2
Fri Dec 18, 2015 5:52 pm
Forum: General discussion
Topic: Running a Pi with only 3V3
Replies: 11
Views: 4615

Re: Running a Pi with only 3V3

I need to design something that will work on Pi1's (and later) Which Pi model are you using, exactly? IIt needs to work on Pi 1's Model B (Rev. 1 and 2) as the project has an installed user base . I'd expect anything that worked on the Pi'1 to work on later models. it probably will not as the power...
by arm2
Fri Dec 18, 2015 9:20 am
Forum: General discussion
Topic: Running a Pi with only 3V3
Replies: 11
Views: 4615

Re: Running a Pi with only 3V3

TimG wrote:
arm2 wrote:I need to design something that will work on Pi1's (and later)
Which Pi model are you using, exactly?
It needs to work on Pi 1's Model B (Rev. 1 and 2) as the project has an installed user base . I'd expect anything that worked on the Pi'1 to work on later models.
by arm2
Thu Dec 17, 2015 2:31 pm
Forum: General discussion
Topic: Running a Pi with only 3V3
Replies: 11
Views: 4615

Running a Pi with only 3V3

Early on there was discussion that if you don't need HDMI, networking or USB you could run a Pi at 3v3 (powering via the 3v3 pin on the GPIO) has anyone managed this? I need to design something that will work on Pi1's (and later) that will continue to run whilst accessing GPIO and SD card but with n...
by arm2
Thu Feb 26, 2015 6:45 pm
Forum: HATs and other add-ons
Topic: Wanted old Laptop keyboards for Repurposing Laptop project
Replies: 0
Views: 451

Wanted old Laptop keyboards for Repurposing Laptop project

I'm looking to get hold of some old laptop keyboards with either an integrated pointing stick or with a touchpad that has a scroll section on the side. We're working on a project to put Pi Compute modules inside old laptops. Part of the project is interfacing Laptop keyboards and Touchpads to the Pi...
by arm2
Thu Feb 26, 2015 6:04 pm
Forum: Compute Module
Topic: CM and LAN9514
Replies: 28
Views: 13785

Re: CM and LAN9514

Is there an ETA when the full B+ schematics will be released?

I realise you've all been rather busy!

Hopefully the Pi2 schematics will follow but I think most/all the information needed will be in the B+ schematics.
by arm2
Wed Feb 04, 2015 10:10 am
Forum: General discussion
Topic: The Raspberry Pi 2 Q&A thread
Replies: 442
Views: 109808

Re: The Raspberry Pi 2 Q&A thread

I also noticed that RISC OS Pi is not currently compatible with Raspberry Pi 2 .... I am also wondering whether NutPi will be supported on a version of RISC OS Pi compatible with Raspberry Pi 2, given how this commercial RISC OS software was locked to the Raspberry Pi hardware. The latest nightly B...
by arm2
Wed Feb 04, 2015 9:46 am
Forum: General discussion
Topic: The Raspberry Pi 2 Q&A thread
Replies: 442
Views: 109808

Re: The Raspberry Pi 2 Q&A thread

I noticed a cool new feature, too. When the power supply is insufficient, a small rainbow-coloured square appears in the top right hand side of the screen, which also becomes translucent as the power reaches its limit. That came in with the B+ more details at:http://www.raspberrypi.org/forums/viewt...
by arm2
Mon Dec 15, 2014 12:35 pm
Forum: Compute Module
Topic: DDR2 SODIMM connector
Replies: 4
Views: 7460

Re: DDR2 SODIMM connector

It would be great if RS & Farnell listed all the components used to build Pi's and development kits!
I realise that would not include BCM2835, DDR ram or PCB but offering the LAN9512 etc. and all the connectors, and passives would be extremely useful.
by arm2
Mon Dec 15, 2014 12:30 pm
Forum: Compute Module
Topic: CM and LAN9514
Replies: 28
Views: 13785

Re: CM and LAN9514

Any news on when the full B+ schematics will be released?
by arm2
Thu Dec 11, 2014 5:17 pm
Forum: Compute Module
Topic: CM and LAN9514
Replies: 28
Views: 13785

Re: CM and LAN9514

The B+ schematics should answer most or all of you questions.
http://www.raspberrypi.org/documentatio ... /README.md
by arm2
Fri Oct 31, 2014 5:16 pm
Forum: Compute Module
Topic: CM IO design files
Replies: 7
Views: 2061

Re: CM IO design files

Hi I've been looking at the I/O board design files in Cadence's entry level version of their software. WE hope to buy a fuller version soon. First we're new to Cadence here and boy is it way more involved than what we're used to. Very unintuitive to us:-( AIUI The one thing that Cadence does in a bi...
by arm2
Sat Oct 04, 2014 10:27 am
Forum: HATs and other add-ons
Topic: Gert's VGA add-on for the B+
Replies: 240
Views: 111117

Re: Gert's VGA add-on for the B+

1. To use the VGA you need a newer image (although I don't know the exact version.) You ALWAYS need the "dt-blob-dpi.bin" in the boot partition. 2. I don't think there is a configuration for less bits. Also it is not needed, the system does not care if you don't use some bits. Beware to always keep...
by arm2
Thu Oct 02, 2014 10:54 am
Forum: HATs and other add-ons
Topic: [resolved] Gert's VGA66 - two issues
Replies: 9
Views: 3411

Re: [resolved] Gert's VGA66 - two issues

You need a better power supply. You've got the little B+ coloured square in the top corner (above and to the right of the Minecraft window). Hi Dougie Can you explain more please? I've tried searching the forums but obviously not used the right search terms. EDIT: More searching found the answer at...
by arm2
Thu Sep 25, 2014 4:13 pm
Forum: Compute Module
Topic: CM IO design files
Replies: 7
Views: 2061

Re: CM IO design files

Sorry for the gobbledygook it should have read: "At launch, it was mentioned that they planned..." TBH I can't find it in the blog comments section though I may missed it amongst the 500+ comments They did say in the blog post itself: " initially we are releasing just the schematics for both the Com...
by arm2
Thu Sep 25, 2014 9:56 am
Forum: Compute Module
Topic: CM IO design files
Replies: 7
Views: 2061

Re: CM IO design files

Are design files (esp. digital schematics) for the reference IO board available? At launch that mention that they planned to release the Cadence files, I've not heard anything since and my email 10 days ago to the Foundation about the files is unanswered as yet. I know Eben has been/is now on holid...
by arm2
Tue Aug 26, 2014 11:09 am
Forum: Compute Module
Topic: How to get a 2nd Camera Adapter Board?
Replies: 29
Views: 8446

Re: How to get a 2nd Camera Adapter Board?

Gordon & AndrewS: I've an adaptor board I don't expect to use for a couple of months, if either of you are doing some development work, I could loan it to one of you! Can I suggest you talk to each other about your planned use, and hopefully agree which use will benefit the community most? please em...
by arm2
Fri Jul 25, 2014 4:56 pm
Forum: Compute Module
Topic: Suggestion for Documentation additions
Replies: 3
Views: 1176

Re: Suggestion for Documentation additions

With my English I wouldn't want to inflict it on you.

Another aspect worth documenting I think.
Once you have it working, if you run rpiboot again to turn it into a mass storage device won't cause anything already written to eMMC to be wiped. I know I'm not the only person to wonder that!
by arm2
Fri Jul 25, 2014 4:06 pm
Forum: Compute Module
Topic: Suggestion for Documentation additions
Replies: 3
Views: 1176

Suggestion for Documentation additions

I'm trying to help a friend get his CM working but have spotted a gap in the documentation After he's typed: pi@raspberrypi ~/tools/usbboot $ sudo ./rpiboot he reports getting another prompt, I've told him: After that you should get a message something like "looking for BCM2835" and then when it fin...
by arm2
Thu Jul 17, 2014 9:15 pm
Forum: General discussion
Topic: The Raspberry Pi Model B+ Q&A thread
Replies: 388
Views: 177157

Re: The Raspberry Pi Model B+ Q&A thread

jdb wrote:The default current limit setting for the USB ports is 600mA (aggregate across the 4 ports). This can be increased to 1.2A via software config if you have a sufficiently powerful PSU.
How do you configure it in software?
start.elf?
by arm2
Thu Jul 17, 2014 8:34 pm
Forum: General discussion
Topic: The Raspberry Pi Model B+ Q&A thread
Replies: 388
Views: 177157

Re: The Raspberry Pi Model B+ Q&A thread

gordon@drogon.net wrote: The 5v to the HDMI socket is fed by an AP2331W current limiting device. This limits the maximum current to 400mA.
-Gordon
Thanks Gordon. How do you know that?
Have I missed the schematics being published?
by arm2
Wed Jul 16, 2014 9:04 pm
Forum: General discussion
Topic: The Raspberry Pi Model B+ Q&A thread
Replies: 388
Views: 177157

Re: The Raspberry Pi Model B+ Q&A thread

First of all, Congrats for getting out of beta :) The new revision looks awesome. Question: Will unpowered HDMI>VGA converters be safer to use with the B+? I gather it was just a matter of 1 diode before... Yes. The HDMI hotplug supply now has a current limit device on it, similar to the USB output...
by arm2
Mon Jul 14, 2014 12:00 pm
Forum: General discussion
Topic: The Raspberry Pi Model B+ Q&A thread
Replies: 388
Views: 177157

Re: The Raspberry Pi Model B+ Q&A thread

Any Idea when the schematics will be released?
The Adafruit write up https://learn.adafruit.com/introducing- ... b?view=all includes quite a few parts of the B+'s schematic!
by arm2
Mon Jul 14, 2014 11:54 am
Forum: General discussion
Topic: The Raspberry Pi Model B+ Q&A thread
Replies: 388
Views: 177157

Re: The Raspberry Pi Model B+ Q&A thread

A lot of very useful improvements. Thank You RPF! I can't see any pads for a reset switch, am I being blind? I can see two pads marked 'RUN' what does it do? The RUN header is the same as P6 on the Model B, it's just been moved next to the PWR/ACT LEDS (top left). For those people like me who need ...
by arm2
Mon Jul 14, 2014 11:15 am
Forum: General discussion
Topic: The Raspberry Pi Model B+ Q&A thread
Replies: 388
Views: 177157

Re: The Raspberry Pi Model B+ Q&A thread

A lot of very useful improvements. Thank You RPF!
I can't see any pads for a reset switch, am I being blind?
I can see two pads marked 'RUN' what does it do?
by arm2
Sat Jun 28, 2014 9:20 pm
Forum: Compute Module
Topic: Raspberry Pi Compute module availability
Replies: 17
Views: 4125

Re: Raspberry Pi Compute module availability

From http://www.raspberrypi.org/raspberry-pi-compute-module-new-product/ "Dan asked: 7th Apr 2014 at 5:06 pm .... (i.e. so that products can be developed around these modules with the re-assurance that they will still be a supply of these, or a suitable replacement, available 5 years from now) Reply...

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