I designed this little housing to support another project. It holds an Adafruit Trinket and Maxbotix MaxSonar sensor. The top screws on with 2.5mm cap head machine screws. I tapped the holes; if you don't tap you'll probably want to use different screws. The hole in the side is for wiring. I'm happy with the outcome and maybe someday it'll save someone else a little time.
Printed in Hatchbox Green PLA.