Thoughtophone

I mislabelled the batteries in my robot chassis, put the batteries in the wrong way, and loud pop! resulted 😞. The capacitor on the motor driver board had explo ded. It's all soldered together, so the easiest thing to do was build another board. I've done that, and added reverse voltage protection using a mosfet: Wish I'd thought of that before. Anyway, I've built another shield to replace the destroyed one.

http://www.thingiverse.com/thing:2127404 It's a different solution to the inconvenience of connecting the ST-Link to a Nucleo board: I printed a little block to push the individual connectors into, which holds them in the right place. This makes it quick to make a correct connection. I had to design and print a box for the ST-Link that accommodates the connector blocks. I've actually got the beginnings of a [box building library](https://bitbucket.org/davidji/roundbot/src/29e6f1c9a86ac51f5250e6fd096bca2c78679e78/hardware/boxes.py?at=default&fileviewer=file-view-default).