bluepuma
Posts: 30
Joined: Thu Aug 02, 2012 1:18 pm
Location: Europe

Tiny carrier board for CM3? Or handmade USB connections?

Thu Sep 16, 2021 3:46 pm

I have a Raspi Zero W build into a speaker and would like to replace it with a faster CPU, but space is very limited. Therefore I am looking for a tiny carrier board for CM3 that doesn't really increase the footprint. Are there any available?

Alternatively, is there a way to use a simple header for the CM3+ and just solder peripherals to it? All I need is power, USB for WiFi and USB for a sound-card (via USB hub?), plus 5 GPIOs for push buttons.

Has this been done before? Do I need extra electronic components like resistors and capacitors?

Thanks,
bluepuma

aBUGSworstnightmare
Posts: 3610
Joined: Tue Jun 30, 2015 1:35 pm

Re: Tiny carrier board for CM3? Or handmade USB connections?

Thu Sep 16, 2021 4:44 pm

.. And voltage regulators and and and.

Small for CM3 is https://www.waveshare.com/product/raspb ... -board.htm, https://www.gumstix.com/gumstix-pi-comp ... board.html

Why CM3? Do you have some which you want to use? If not use i.e. https://eckstein-shop.de/WaveShareMiniB ... gLk0PD_BwE or check with https://github.com/harlab/CM4Ext_Nano if the Nano is available.
'Tons' of small options for CM4 btw

bluepuma
Posts: 30
Joined: Thu Aug 02, 2012 1:18 pm
Location: Europe

Re: Tiny carrier board for CM3? Or handmade USB connections?

Mon Sep 20, 2021 8:41 am

Thanks for the reply!

I have very limited space in the device, therefore I am looking for a Raspi-Zero size footprint.

I thought the CM3 is really small and there could be a tiny carrier board in the same size (with electronics on the back-side) available.

Most of those carrier boards look like the size of a regular Raspi, so there is no advantage for me.

Cheers
bluepuma

Cloudcentric
Posts: 1277
Joined: Fri Sep 14, 2012 9:13 am

Re: Tiny carrier board for CM3? Or handmade USB connections?

Mon Sep 20, 2021 9:22 am

bluepuma wrote:
Mon Sep 20, 2021 8:41 am
Thanks for the reply!

I have very limited space in the device, therefore I am looking for a Raspi-Zero size footprint.

I thought the CM3 is really small and there could be a tiny carrier board in the same size (with electronics on the back-side) available.

Most of those carrier boards look like the size of a regular Raspi, so there is no advantage for me.

Cheers
bluepuma

Never seen such a Carrier Board for CM3/4, likely would need a Chinese SBC (BPI-M2 Zero) but quality and support could be an issue.
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jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 29614
Joined: Sat Jul 30, 2011 7:41 pm

Re: Tiny carrier board for CM3? Or handmade USB connections?

Mon Sep 20, 2021 9:42 am

I'd go with the CM4, more likely to be able to find stock as well. CM3's are very very thin on the ground at the moment.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Working in the Applications Team.

aBUGSworstnightmare
Posts: 3610
Joined: Tue Jun 30, 2015 1:35 pm

Re: Tiny carrier board for CM3? Or handmade USB connections?

Mon Sep 20, 2021 10:55 am

bluepuma wrote:
Mon Sep 20, 2021 8:41 am
Thanks for the reply!

I have very limited space in the device, therefore I am looking for a Raspi-Zero size footprint.

I thought the CM3 is really small and there could be a tiny carrier board in the same size (with electronics on the back-side) available.

Most of those carrier boards look like the size of a regular Raspi, so there is no advantage for me.

Cheers
bluepuma
look at this one https://geekworm.com/collections/new-ar ... -cm4-stick

But don't argue that you'll need full 40pin GPIO.

Why don't you try https://www.raspberrypi.org/products/ra ... el-a-plus/

And .. The only real small CM1/3 carrier that I'm aware of was WD labs media stick viewtopic.php?t=126821#p848559 .. And that's not what you're looking for (even in case you'll manage to find one as WD labs has stopped that business years ago).

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