I'm helping someone install an analog airspeed sensor with the pixhawk, the wiki says:
The “airspeed” pin 15 is located on a 3 pin DF13 connector on the Pixhawk board.
This pin can take voltages up to 6.6V (it has an internal voltage divider).
The analog airspeed sensor does not have a DF13 connector, but instead a servo cable. So - the only way to connect the analog sensor is to butcher a DF13 cable and splice it to the servo cable? that seems odd! No way to connect the sensor to one of the normal servo style connectors on the pixhawk?
Thanks - any help would be appreciated.
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I've used analog air speed sensors on two different planes with Pixhawks. They work perfect. I sacrificed an I2C cable by cutting off the 4th pin. Then followed the instructions here: http://plane.ardupilot.com/wiki/airspeed/#analog_airspeed_sensor
Also using analog airspeed sensor on APM, sufficiently stable (to 1 or 2 km/h). Don't forget that on every startup it has to be covered and it will calibrate itself for "zero" wind speed.
as it turns out, my pito tube became clogged with some foam from the cover I made for it. Its better now, still not very accurate at low speeds, but at least usable.
its just like you said. Although I found the analogue sensor to be nearly useless.