works great and instructions for usage are clear
For SD card locker (make true read-only SD/MicroSD)
Using this to lock SD-cards that contains keys for startup decryption of pcs (FDE), so people that have them don't get the idea to use them for anything else.
The locking and unlocking works perfectly and instructions are very clear. I did not try the permanent locking function, since that is not required in my use case.
The addition on having the instructions on the PCB is also very good since, If I don't use this for some years (which will probably happen) after the initial use I would probably not even remember what it is, and for sure not how to use it. Having the instructions right on there, you will never lose them.
Board looks clean and I can't find any fault with the solder connections.
I shipment happened very fast and I got a clear message with the tracking information. Packaging was good, the components were even sealed in esd-shielding bags, didn't really expect that.
If you order the adapter for reprogramming you get a SD-cards adapter that has wires soldered to it, that you than can plug onto the pins of your AVR programmer, I didn't test the reprogramming yet through.
It would maybe be a good idea to just put an SPI header onto the board, maybe that could be an improvement for further versions. But since it has none currently the solution of using the SD-card slot as SPI header is actually quite nice.
Ordering this here saved me a lot of time (and possibly money) by not making me acquire pcbs and all the different components to build it myself. Since the (very few) other commercial solutions that I found are way to expensive.
