Jamie, I bought one of your Waveware Stepper Motor Hats the other week and after getting it going and, I thought, having something useful to share about it tried to write "the first review" for it. Spent some time writing but it hasn't appeared yet. See below... The usual prompt delivery from PiHut. Bought this board to drive the focus knob on a remoted astro-telescope. The board works very well and has the advantage of a very useful wide input range switching regulator that can also drive the Pi. The software examples are very basic but provide a good starting point. Given I need to run my project on a battery I've found a set back. Whether by feature or faux-pas the current motor design energies the motors the moment the external power is applied and the motors heat up very quickly at the expense of the battery. TIP: ensure the motor current limit pots are set minimum before you first start. This motor-ON state persists until the Pi is fully booted AND the controlling program starts, configures the GPIO and acquires the motor drive. SUGGEST the first thing to do is call motor_STOP to de-energise the motors before attempting anything else. Turns out the motor drive chip default is to set the drive ON by internal pull-down. Doh! On shutdown the GPIO pins float bringing the motor(s) back on and the motor drive returns meaning the external power has to be removed soonest to save the batteries. Similarly, if the useful on-board 5v switch is set to off only the Pi looses power bringing the motor(s) on (again). Have added two 3.3K resistors from the motor driver chip's enable pins and up the Pi's 3.3v. This solves my problem as long as the Pi is powered. A better solution would be to connect to the driver's on-chip 3.3v output pin but the small surface mount layout makes this very difficult. My resistors are soldered across the board's 40pin interface connector but a better way would be on a retro fitted piggy back connector. The current board design would benefit from a revision to allow either motors-ON from applied power OR when the user's program is running and has a grip of things. SteveW (aka RaspiSteve)