I've gone from my first prototype to a custom PCB connector board. This is a NiceTOTP device.



It's a standalone TOTP device. After the initial setup, no phone nor computer is required.

It doesn't do passwords, just TOTP. A code is entered with the two buttons to unlock it, then you can flip through your accounts.

If you wanted to build just one unit, it'd be about $60 USD in parts ($50 w/o a battery).

Links:

https://github.com/ICantMakeTh…

https://icmt.cc/p/nicetotp/

https://shop.icmt.cc/product/1