Setup: BLueRov2 electronics on benchtop; T200 thruster connnected to ESC1; benchtop 16V/9A supply connected to main votlage regulator, running pymavlink on topside mac.
Action: Used Bluerobotics pymavlink python script examples (https://www.ardusub.com/developers/pymavlink.html) to arm and manual mode vehicle. Issued the set_ rc_channel_pwm(4, 1900) command for 10 sec, the thruster spun up normally and then all of sudden the lights on RPi/Pixhawk went out and the benchtop power supply indicated 0V/5A. I shut down the bench power supply immediately.
Problem: The BlueROV2’s main voltage regulator appears to be toast as does the Pixhawk’s BEC contained on the same board. The RPi still boots up with USB power supply and is fine but the Pixhawk won’t communicate and only issues a feeble blinking green power light.
We plan on replacing the main voltage regulator and the Pixhawk, if they are not salvagable, however I’d like the community’s thoughts as to what happened. It seems that the commanded pwm of 1900 should be well within the power rating for the electronics.
Thanks in advance, Tim