A double case I created to hold my raspberry pi 0w and protoboard used to connect my pulse counter to read my water meter. I use the pi in combination with P1monitor (Dutch) and this guide (Dutch) to connect my water meter.

The case has eight nubs to fix the raspberry pi and protoboard in place. To close the case, you need three M2x6 screws.

Feel free to use the f3d or step file to remix/edit the file to suit your needs. I would appreciate a message if you do, I might learn something.