Hi all, If I wanted to build a free standing nav-com unit, What interface card and rotary encoder would I need?. Also any tutorials out there? Thanks,

http://www.fscockpit.com/http://www.mikesflightdeck.com/good sites to start with.Lots of IO cards possible.If you can make them your own I suggest fsbus. Otherwise buy the assembled cards from http://www.opencockpits.com/ redardsnorbert

Here's mine.... The rotaries are Knitter switches, and the displays are a pair of 2 x 40 LCD screens running on FSLCD.http://forums.avsim.net/user_files/192907.jpgThe Knitters and pushbuttons (inluding 12 buttons on a hand held "mic" that's not shown) are connected to the PC bt a Beta Innovatgions 64 button card.Richard

Hi, thanks for your replies, picture looks good. will any encoder work, or must they be special like pot's, "linear ". I can get the following cheap.

A Knitter switch and an encoder are two different things. Both have a common ground and an A and B output. The difference though is that when you turn a Knitter one way it closes A, A, A, A etc, and the other way closes B, B, B, B etc, while an encoder, if turned one way gives AB, AB, AB AB, while the other way gives BA, BA, BA, BA.A knitter can be connected directly to any input card that can take a momentary input. An encoder needs an intermediate decoder.This is what the two different waveforms look like.http://forums.avsim.net/user_files/193029.jpgRichard

Hi Richard, thanks for your reply, I am waiting for my order to arrive.