I've received the finished control boards for the biohand about 3 weeks ago. Due to some time constraints, I finished the board and minimal test program for the STM32F103 only during the last week. Despite two minor pinout mistakes on the board (that I've managed to work around), it worked nicely.

Check the board demo video on Instagram.

The board was attached to the palm, as shown below:

At some point, this seemed like a good idea. However, the attachments I designed for the board didn't worked out as well as planned (ergo the hot glue all around). Also, the board makes the assembly thicker than I've planned, so adding another layer of a 3D-printed protective cover wiill make the hand too large.

So, I'm already working on an obvious fix; swapping the board to the "back" of the hand, instead of the "inner" palm. I'll post a sketch as soon as I come up with a consistent idea.

'til next time!