Created
May 22, 2020 05:32
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| | PIN | | Description | | |
| |-----+---------+---------------------+ | |
| | 01 | Shield | | | |
| | 02 | | | | |
| | 03 | | | | |
| | 04 | GRND | | | |
| | 05 | 16V | Supply (for dock ?) | | |
| | 06 | 16V | | | |
| | 07 | 16V | | | |
| | 08 | 5V | Supply for usb ? | | |
| | 09 | 5V | | | |
| | 10 | 5V | | | |
| | 11 | GRND | | | |
| | 12 | D- | USB D- | | |
| | 13 | D+ | USB D+ | | |
| | 14 | GRND | | | |
| | 15 | TX+ | ETHERNET TX+ | | |
| | 16 | TX- | ETHERNET TX- | | |
| | 17 | GRND | | | |
| | 18 | RX + | ETHERNET RX+ | | |
| | 19 | RX- | ETHERNET RX- | | |
| | 20 | GRND | | | |
| | 21 | | | | |
| | 22 | SHORT ? | | | |
| | 23 | | | | |
| | 24 | | | | |
| As you can see |
and two details about my design, I tend to do my prototyping on a single-sided PCB, etched at home.
- precise alignment, that’s why the chosen pogopins are through hole components with a tab
- rest of the components are on the opposite side of the PCB so it can lie as flat as possible.
And now that I complained about the spring-loaded connectors, aliexpress offered them directly… :D
https://www.aliexpress.com/item/1005005574169122.html?
The B22A0 spring loaded connector seem to be a good choice, don't know how to solder those connectors tough
Would be awesome to find a 1,5mm pitch connector but I think those single connectors are the way to go
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I have been thinking about it. The lowest profile pogo-pins I found with little effort was 2mm tall with a 1mm moving tip. so there would still be a 2mm gap between the PCB and the expansion-connector. So in my mind it will need some kind of thicker 3d-printed exclosure, propably with holes for pogopins and a and neccessary holes and tabs for fixing the whole thing over the expansion-connector.
of course this can be modified, for example the profile could be lower/thinner if the pogo-pins were replaced with something different.
I have tried to find single springloaded compression contact used in some battery terminals. picture bellow. But they all seem to be pre-packed with standard pithches, not fitting over the expansion-connector.