The MLC mega is a magnificent version of the MattzoLayoutController that can be used to control 16 servos, 8 light signals and 16 sensors at the same time.
It can also be configured to work as a controller for level crossings, bascule bridges and turn tables.
The controller has one built-in PCA9685 servo port extender and two built-in MCP23017 I/O port extenders. The case has a lateral dimension of 10×10 studs (8 x 8 cm) and is 5 bricks high (4,8 cm).
The case uses especially designed PCBs and comes with a case that can be easily created with a 3D printer.
Instructions (in German), Gerber files for the PCBs and STL files for the case and other parts can be downloaded here.
We have ordered the PCBs at https://jlcpcb.com/
Find information how to buy the other required material on the bill of material.
The following pictures illustrate the building procedure step-by-step for the power supply option no. 3:
We are presently preparing a revised version of the MLC mega that will be easier to build, and probably even be a bit smaller.