Several months ago I wrote a post about a breakout board for the TB6612 motor driver. You can find that here. The reason I made my own breakout board for this was that the ones available from Sparkfun, Adafruit, and Digikey didn’t have diodes on the board. The TB6612 says it has internal diodes but those are small and I saw somebody online suggest always using external diodes. Today I realized I wasn’t sure if I actually needed them or not so I decided to do my own test to find out.