ALTIMETER GAUGE (Robust version with 2 stepper motors)

Baro altemeter  for home built simulator. Ideal for GA aircraft 3d printed with PLA. This is the robust version where a drive chain of gears is used to control the needles instead of separate stepper motors. 
 
The 100FT needle has a zero positioning sensor . For initial calibration the 1000ft needle must always  be between 0 and 1 for correct auto calibration.
 
Baro is controled stepper motor with zero position sensor for correct calibration and is receiving data from the flight sim.
 
Baro pressure can be adjusted by the baroknob through rotary encoder with push button reseting to simulator Barometric pressure.