SD Card place

IceOnly · July 31, 2025, 10:17am

I started to print the first parts and sourced the most of the components. Now waiting for all my packages

I think the place to insert the SD card is anything but perfect.
Would it not make sense to switch from micro sd to an usb stick?

The teensy can be equipt with an usb host cable:

We can mount it directly to the face plate.
And it looks easy to implement:

github.com/PaulStoffregen/USBHost_t36

examples/Storage/ListFiles/ListFiles.ino

master

/*
  MSC USB Drive basic directory list example

 created   Nov 2010
 by David A. Mellis
 modified 9 Apr 2012
 by Tom Igoe
 modified 17 Nov 2020
 by Warren Watson

 This example code is in the public domain.

 */
#include <USBHost_t36.h>

// Setup USBHost_t36 and as many HUB ports as needed.
USBHost myusb;
USBHub hub1(myusb);
USBHub hub2(myusb);
USBHub hub3(myusb);

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camchaney · July 31, 2025, 6:06pm

I agree! The SD card placement was one oversight I had while designing the PCB (along with the microUSB accessibility). One of the beta testers suggested using an SD extension cable, which is what I’ve been using for the past few months and have included in the kits. It works great, but I agree is less than optimal. I will definitely be taking this into account for the next PCB revision.

A USB hub is an interesting idea, though! The main consideration with that is the extra I/O consumption. Do you know how that integrates? There are a couple extra serial lines that could potentially be used.

IceOnly · July 31, 2025, 7:18pm

The Teensy 4.1 hast a native USB Host pinout:

I will try to implement it, If all my electronics are arrived.

camchaney · July 31, 2025, 7:25pm

Oh shoot that’s awesome! Tbh I had no idea that’s what those pins were for