This is the closest we have today:

That is a bare modem board, with just the sip connectors. The prototype above is a K-line transceiver.

I think it would be trivial, and cheap, to make up what you show. Perhaps just solder ready pads at 0.1” pitch, then the side sip connectors wired to the first row of pads at each edge. Perhaps 5 PCBs in a kit, with sip edge connectors, unsoldered, in a simple plastic bag.

Does that sound like something useful? If so, I can ask the China guys for some idea of pricing. If it is just the unsoldered pcbs + parts, I don’t think it will be expensive.

On 7 Apr 2019, at 4:38 PM, Michael Balzer <dexter@expeedo.de> wrote:

Mark,

do you know of some kind of prototyping board available that fits to our piggy back expansion layout?

Something like this: https://www.robotshop.com/de/de/cytron-arduino-proto-schild.html

Regards,
Michael

Am 03.04.19 um 06:48 schrieb Mark Webb-Johnson:

If you have work to do on this DA26 expansion ports, this is pretty cool and well built:

https://www.aliexpress.com/item/26-Pin-D-SUB-DB26-3-Rows-Serial-Parallel-Port-Serial-Shellless-Male-And-Female-Connector/32886738786.html?spm=a2g0s.9042311.0.0.20924c4dg34EEU
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