Relay Camera Trigger CHDK - 3DR APM Plane

Hello everyone.

I have an 3DR APM Plane

My goal is to configure the camera trigger for CHDK.

What I know:

  • Configure camera with chdk. It's done.
  • Configure APM camera trigger.

I've being searching and looking at CHDK topic in adupilot website. And without success.

I learned that I have to configure CAM_TRIGG_TYPE to (Relay). Then configure the channel. In this case I want to shut the camera with APM with DO_DIGICAM_CONTROL. Also I need an Amplifier Circuit to make the APM output can shut the camera.

Questions that I'd like to to solve:

  • How does CAM_TRIGG_TYPE==1 work? Does the output output a PullUp signal?
  • What other configuration do I have to do through mission Planner? RC10.

At the end I want to read the APM DO_DIGICAM_CONTROL output signal with another microcontroller for other purpose.

The main focus for my issue could be to configure the APM Plane to work with DO_DIGICAM_CONTROL.

Thanks a lot.

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Replies

  • Ok, I did a research and this are the configuration for this purpose:

    Mission Planner

     - CAM_TRIGG_TYPE 1
     - RC7_FUNCTION 10
     - RELAY_PIN 50 :this the number of pin A9, check PixHawk Common Pins
     Camera Gimbal
     - Shutter RC7

    PixHawk
     - Connect Cable (CHDK) to A9 (Ground and signal, output 3.3V)

    If someone has the same problem I can help them.

    Regards.

    • Just looking to get the same with pixhawk ourselves

      what was the answer to your below comment......

      • How does CAM_TRIGG_TYPE==1 work? Does the output output a PullUp signal?

      Does it out put a 3.3v signal our fution as a true relay?

      thanks for any help, would save some time and testing.

      • CAM_TRIGG_TYPE == 1 means Relay mode. It has PullUp signal when it is triggered. 3.3V output.

        Output Relay is like digital Output 0 or 1. 0 or 0.0V nothing happend, 1 or 3.3V, the camera was triggered.

        Regards.

        • thanks for the reply, that was the assumption we made so all good.

          Best of luck with your project....

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