Go to advanced search

by Briarios
Mon Sep 01, 2014 6:07 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

Hey guys, I thought I would post an update to let you know that i am still working on the project :D but it has been a little slow over the last few days as i had a small car accident which took the fun out of last week. I have essentially started from scratch again power management wise as well as ...
by Briarios
Tue Aug 26, 2014 4:56 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

Springy wrote:Yup, keep at it! Doesn't sound like you were far away from it :)
Yeah I wasn't far away :lol: but word to the wise, copy part for part the power management from the CMIO board! It will save a headache in future :P :lol:
by Briarios
Tue Aug 26, 2014 4:39 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

If at first you don't succeed. Try, try again :D
by Briarios
Mon Aug 25, 2014 12:56 pm
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

Ok guys, to give you all an update, i was able to do some testing over the weekend and well in terms of power management I will have to go back to the drawing board as the linear regulator for the 1v8 rail was fluctuating quite badly thus not able to sufficiently power the CM properly and wasn't abl...
by Briarios
Tue Aug 19, 2014 4:44 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

Hey Guys, I thought I would let you know that the PCB's have arrived. http://pmfg.me/rpi/CM_Test_Board_1.x/photo%201.JPG http://pmfg.me/rpi/CM_Test_Board_1.x/photo%202.JPG I used what i had on hand to give a visual representation on the relative size of the board and I will say in real life it is ro...
by Briarios
Sun Aug 17, 2014 1:26 pm
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

did you look publish your proyect in kikstarter.com? What is probably more people that you support your project and support you to do more things or proyects. Sorry my english is bad XD Hello Esquerbatua, Yes I have had a look at kickstarter and I will do it at some stage but first i would like to ...
by Briarios
Sun Aug 17, 2014 12:57 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

Thanks for the support guys, it is much appreciated :D, as with prices and posting I will try and keep the prices reasonable and the postage might be expensive due to me living in Australia and distance to Europe.
by Briarios
Fri Aug 15, 2014 11:32 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

Lovely pictures, very professional. I was looking back to your first post in this thread. .........I have only covered the Bare essentials to get the CM up and running and responding via USB and Ethernet. once I get feedback that this will work, then go further ........ This is one of many steps to...
by Briarios
Fri Aug 15, 2014 4:16 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

Hey Guys, I thought I would give an update, the Fab house have shipped my Test PCB's fully assembled, should hopefully get them next week sometime, thought I would share the pics they sent me http://pmfg.me/rpi/CM_Test_Board_1.x/P40814-162515.jpg (Topside) http://pmfg.me/rpi/CM_Test_Board_1.x/P40814...
by Briarios
Thu Aug 14, 2014 10:10 pm
Forum: Compute Module
Topic: Compute module won't boot
Replies: 6
Views: 2047

Re: Compute module won't boot

assuming that you only have 3v3 and 1v8 lines connected, you will need to delay the 1v8 lines on the CM in order for it to boot.

read http://www.raspberrypi.org/documentatio ... gnguide.md
by Briarios
Wed Aug 13, 2014 10:29 am
Forum: Compute Module
Topic: Compute module boot issue (solved)
Replies: 17
Views: 4345

Re: Compute module boot issue

Hi Briarios, Thanks for your feedback. Do you mean GPIO28/29 and GPIO44/45 ? According to the datasheet there's no internal pull U/D on these GPIO that's the reason we find pull-down resistors on the CMIO schematic. For info these pull down resistors are populated in our design. Greg ahh yes those ...
by Briarios
Tue Aug 12, 2014 11:44 pm
Forum: Compute Module
Topic: Compute module boot issue (solved)
Replies: 17
Views: 4345

Re: Compute module boot issue

I think there are 4 GPIO's that you can't really use during boot up, can't think of which ones they are atm should be in the CMIO schematic.
by Briarios
Mon Aug 11, 2014 10:16 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

hi, I also design with Eagle. Would it be possible to share the .sch and the .brd files? It would be a great start to desing my own compute modules. Hello Kridri, once i can confirm that the design i have created works and works well, I will be releasing the eagle cad files, probably via github or ...
by Briarios
Thu Aug 07, 2014 3:26 am
Forum: Compute Module
Topic: What is time schedule for the Compute Modules availability
Replies: 40
Views: 9544

Re: What is time schedule for the Compute Modules availabili

Anyone had any updates about the availability of the compute modules?
by Briarios
Tue Aug 05, 2014 1:07 pm
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

svrsig wrote:Wow! Smallest text 32mm high!!

what he said above :P
by Briarios
Tue Aug 05, 2014 9:30 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

Hello again guys, I thought I would give you an update on the test board. I have sent the necessary files to the Fab house in China to get the prototypes done. it should take about 2-3 weeks from now till i receive the end product in my hands. while this is now in the hands of the PCB fab house. I t...
by Briarios
Wed Jul 30, 2014 10:55 pm
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

With my Board, I needed about 1.4mm trace width. A 1.4mm trace is a huge trace. from what I see with your Calculations on that is it looks like you're making a 2 layer board? if so, I can see why you would need quite big traces. I am using a 4 layer board and as you can see from the calculations th...
by Briarios
Fri Jul 25, 2014 7:23 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

You can get rid of the crystal
oooh thats good to know :D, also is there anything i need to check and make sure with the layout/ schematic or have I covered pretty much most of it? :)
by Briarios
Fri Jul 25, 2014 6:14 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

Hello, have you considered using the LAN9514 chip? is it possible to use with the compute module? Yes I have considered using the LAN9514 chip, but at this stage i didn't want the hassle of finding space for 2 extra USB ports on the board at this stage, and yes it is possible to use with the comput...
by Briarios
Thu Jul 24, 2014 1:35 pm
Forum: Compute Module
Topic: Problem with new product Compute Module
Replies: 11
Views: 2600

Re: Problem with new product Compute Module

How about EMMC_DISABLE_N?
Beat me to it :P , was going to say that, but the next thing is how have you connected GPIO47? I know that you want to keep your schematic secret but are you able to display the schematic on how you have done the EMMC_DISABLE_N section?
by Briarios
Thu Jul 24, 2014 1:21 pm
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

Hello Guys, Sorry for the delay, as I had just started a new job and all. so here is possibly the last update I will make as it now all seems to be correct and the USB and Ethernet Specs have (what I think) been met. So yeah Enjoy and again thanks for the info and support :D http://pmfg.me/rpi/CM_Te...
by Briarios
Thu Jul 24, 2014 1:26 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

USB2 spec calls for 5v +/- 0.25v officially so technically you are still within the specifications.
Oh yes the hardest part about this that i had to learn on the fly was getting the USB and Ethernet to meet specifications once that was done, everything else was easy.
by Briarios
Tue Jul 22, 2014 11:28 pm
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

Did you keep the resistance of the USB connection in mind? [John Cleese voice] ahh yes, it would seem that i have indeed missed it... but i checked the traces and they are rated for about 1.6 amps across the trace, i also checked the resistance and the first usb socket has a voltage drop to roughly...
by Briarios
Fri Jul 18, 2014 2:21 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 33465

Re: Compute Module Test Board

I would put the crystal closer to the LAN9512, usually it's a requirement, to put it as close as possible. The upper usb connector could be safely moved upwards. Are you going to publish the eagle files for this project? Thanks for pointing that out :) i think i'll do that in the next revision same...

Go to advanced search