snizbatch
05-05-2009, 11:04 AM
Hey everyone! I'm new to the site, and pretty new to hardware interfacing, but I came up with a solution to tuning a NAV radio's fine and coarse frequency with a single rotary encoder with pushbutton. I wired a 5v relay from Radio Shack to the Desktop Aviator board's +5v and GND through the encoder's pushbutton which makes it transfer the Common pin on the encoder from Row 1 to Row 2 when pressed. Turn to tune coarse, push and turn to tune fine. Works great... except that the 2090 is kind of weird and lags a bit. I think everyone has had this problem though. I'd switch to a different board if I had $$ laying around. Hoping maybe this will help someone. I'm going to attach a schematic and photos.