The CDU is a project of a number of fellow cockpit builders. Happily I could join them, which saved me a lot of time. They already made the CAD drawings and the PCB for it.

But I made a number of changes to the original design of the switch connectors and the button caps. I also changed the intended 3 mm LEDS for the backlight in the switches to SMD LEDs.

Milling the CDU panel from a piece of acrylic.

Test fitting some parts.

Function key layer.

Keyboard + function key layer.

Test fitting the buttons.

Components of a Line Select Key (MEC switch, connector and button cap.

SMD for the back light in the MEC switch.

Test fitting the Line Select Keys on the panel.

Backlight test of the Line Select Keys.

Aligning the 5 inch LCD screen to the panel and adjusting the line spacing of the software.