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The Controller Part 2

A project log for DJI FPV Investigations

Things I've learned about the DJI FPV quadcopter.

Duane DegnDuane Degn 03/24/2021 at 02:301 Comment

As mentioned in an earlier log, the gimbals use Hall Effect sensors. Below shows the magnet with the sensor PCB removed.

The gimbal in the photo below has one sensor PCB in place and the other sensor PCB removed.

Besides the two Hall Effect sensors, each gimbal has a small button. This small button is pressed when one of the adjustment screws is all the way in. I think this is so the firmware knows the controller has been configured for manual mode.

The small button is on a flat flex cable. The cable connects to the USB board. The above photo has arrows pointing to the two connectors which are normally mated when assembled.

Below is the left gimbal with the flax flex cable show at the bottom of the photo. The small switch is not in view in this photo.

The small button and white plastic friction liner have been removed from the left joystick in the photo below. The two small buttons are circled.

Below is a rubber light shroud to isolate the LED on the PDB with the USB connection.

Below is the neck strap connector with another view of the light shroud.

Above shows the USB PCB rotated 180 degrees. The charge state LEDs and two buttons are on the other side of the PCB. This PCB has connector to accept the flat flex cables with the small switches.

Above is the connector for the left gimbal. Below shows the connector to the right gimbal.

To be continued.

Discussions

Kenson Leung W.K wrote 10/18/2021 at 14:04 point

do you have any thoughts about hacking the hall gimbal sensor by replacing it with arduino and DAC ? (better ask some advices before blowing up my controller =p)

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