SD extension via CONN_SD design questions



  • Hello all,

    I want to make a SD card extension to plug into CONN_SD on Duet 2 wifi/eth, basically just extending the SPI signals 150-200mm to an SD socket.

    I don't have much electronics design experience, so I have a couple basic questions if anybody knows:

    1. Would any passive components be recommended at the SD socket when extending in this way?

    2. Related to the Duet, would running a PanelDue via the 4-wire cable, and a separate SD extension (rather than using PanelDue SD slot) cause any trouble?

    Here is a picture of what I have in mind: Imagine a cable connecting this to CONN_SD. (no SD card holder model is in KiCad so it only shows the pads and connector).
    9c44abfa-5328-490d-bb28-b831fcebbe1e-image.png

    Any guidance is appreciated. Thanks!



  • Also, here is the schematic i have made (pardon the sideways power ports):
    c32e1843-6e5a-4b23-946d-d8d8ba3da4a4-image.png


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