Hi all, I've installed my ultrasonic sensor today, the recommended MB1240. I've mounted it on the little protruding tab on the 3dr quad kit, which seems like it's designed for the sensor (square cutout for the inductor n all)
Tried it out and the sensor does seem to be functioning, the copter rockets up when I move my hand under it, however it also seems to occasionally just almost shut the motors off entirely for a split second.
Looking back at my logs, it seems like interference to me:
The issue is the sonar sensor mount is really close to the ESC, so the signal cable (which is shielded too) is running right next to the motor wires etc.
So I feel my only option is going to be to somehow put the sonar sensor somewhere else, but thought I'd check I wasn't overlooking something first.
A pic of the sonar mounting: https://dl.dropboxusercontent.com/u/203420/Quadcopter/DSCF2430.jpg
The lowpass filter is also installed.
Dan
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