Discussions

I noticed some strange behaviour of the MaxSonar EZ0 in combination with the APM2 board, firmware 2.9.1:

1) Outdoor test, during flight, the data recorded from the sonar is invalid (no valid data at all)
2) Indoor test, the data looks ok. (board powered from USB)

I already tried the following steps to resolve the issue:
- power filter (capacitor, resistor)
- alternative mounting of the sensor
- dampening of the sensor
- ferrite coil for the supply/signal cable
- cable shield
- recorded the supply voltage on oscilloscope - ok - no peaks

Any suggestions?Today, it was quite cold outside. (-3degrees) Can this be the cause?

Thanks for your suggestions!

Davood

sonar.PNG