Adapter plate for STM Nucleo / Arduino boards to pair with breadboard and servos

I started studying the programming of STM32 microcontrollers and got one of the Nucleo-64 boards for practice. One of the annoying moments was having it freely “gliding” on the surface of my desk with metal connectors being exposed to whatever else was on my desk. Later, it was decided to add the possibility of using Nucleo-144 and some regular Arduino boards. Thus, I made this “holder” that can accommodate:

- microcontroller development board: - tested with: - NUCLEO-G474RE (Nucleo-64 with micro USB) - NUCLEO-H503 (Nucleo-64 with USB type C) - Arduino Uno - NUCLEO-H7S3L8 (Nucleo-144 with USB type C + USB type C OTG + Ethernet) - not tested, but intended to fit: - Arduino Mega - breadboard - regular 830-points breadboard with self-adhesive backside - servos, either: - up to 2 compact servos in a formfactor of SG90 - even with large spin plates - one larger servo in a form-factor MG996 - each slot contains side cutouts for passing connecting wires The slots for servos were added simply because there was some free spot there. The slot for the Nucleo/Arduino board is slightly submerged into the main body of the holder (1.6mm) and also has cutouts through the backplate to keep access to all Nucleo pins.

Exists in 2 variations of fixing screws: M2.5 and M3. Don't use the plastic screws!