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M4-Shim manufactured

A project log for PoE-FeatherWing

Like the Adafruit Ethernet FeatherWing, but with Power over Ethernet built-in!

Patrick Van OosterwijckPatrick Van Oosterwijck 03/24/2021 at 16:352 Comments

My contract manufacturer built 200 piece of the M4-Shim, here are some pictures:

As you can see, I had half of them built with horizontal USB connector, like a normal Feather, and half of them with a vertical USB connector.

The reason for this is that I have some internal uses I'll probably want to use some of these for, that involve having a stack of 3 PCBs: the PoE-FeatherWing on the bottom; a custom, application specific shim with application specific connectors sticking out the back; and the M4-Shim above that.  The "middle shim"'s connectors would likely interfere with the M4-Shim's USB connector if that was also facing back.  So I made the ones with vertical USB to solve that issue.  By my calculation, with the M4-Shim at the top of the stack, the USB should just clear the top of the PoE-FeatherWing's flyback transformer with enough space for the wall of a plastic case.

Next the CM needs to program and test them, but I'm waiting for the official 6.2.0 release of CircuitPython, the first to support the M4-Shim, before I can send them all the binaries.

Discussions

Rick M wrote 08/04/2021 at 05:51 point

I'd be interested in these!

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Patrick Van Oosterwijck wrote 08/04/2021 at 19:09 point

They now are available on Amazon and Tindie!
https://www.amazon.com/M4-Shim-Feather-PoE-FeatherWing-Ultra-Compact-Horizontal/dp/B0971PHFDR/
https://www.tindie.com/products/silicognition/m4-shim/

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