Flight Management Computer

Basically my FMC/CDU is built from a stripped (I removed the tuning and sound section) 5 inch black and white TV. The TV is connected to the TVOut of the graphics card at my FS9 PC. I have placed a resistor of 75 ohm put in parallel with the S-video input, otherwise it would not generate enough load to be detected by the video card.

 

 

The switches used are from Conrad, the part numbers are:

You need 15 Function Keys, 12 numeric keys, 30 square switches, 12 LSKs and 12 LSK caps. All these keys are momentary push buttons.

Switches are labelled, see this EXCEL sheet with labels that can be printed on paper.

A small modification to [Window06] of panel.cfg of the Level-D makes it easier to map the CDU part of the FMC over the TV window without seeing the upper row of the FMC keyboard as well (make sure you have positioned your cdu window below your main window).

 [Window06]
 background_color=0,0,0
 size_mm=370,440
 position=8
 visible=1
 ident=1000
 gauge00=LVLD\B767FMC!CDU,30,30,312
 //gauge01=LVLD\B767FMC!Keyboard,318,372,40,59

Note gauge01 is no longer needed since we communicate digitally with the Level-D via the LevelD-SDK, and not by generating key strokes.

All 69 keys of my FMC are connected to an Opencockpits Mastercard. Two outputs of that Mastercard are used for the EXEC and MSG leds. The connection to the Level-D is made in SIOC by using the SIOC vars provided by lekseecon.

Note that another method of interfacing is with the USB Keys card of Opencockpits.