Camera trigger works inconsistently

Forums General Questions and Comments Camera trigger works inconsistently

  • This topic has 9 replies, 1 voice, and was last updated 5 months ago by SpiroC.
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    • #1939 Reply
      Avinash
      Guest

      Hi Martyn, I have started adding the camera circuit first while waiting for the valve and flash accessories to arrive. The Camera gets triggered using BT on Android, so the setup works for me but many a times it doesn’t fire (like it fires once in 2-3 trials) though the camera shutter status LED flashes as described by you. Could you please help what could be the possible reason for this behaviour. Bluetooth status light looks good. Using default settings of Android app. I’m not using diode yet. supplying ~5v from step down power regulator into “VIN” pin of nano and getting out supply from “5v” pin of nano.

    • #1940 Reply
      Martyn
      Keymaster

      I don’t really understand the problem. Can you explain a little more.

      The Android app sends the drop data to the dropController which then turns the valves on and off and triggers the camera and flash. It does not trigger the camera. This is done by the dropController.

      The camera triggers are on D10 and D11. D10 is the shutter and D11 is the focus. For testing, you can place LEDs (plus resistor) on these pins. This will give you a visual indication the triggers are firing.

      I have a dropController “simulator” that I use for developing the code. This is just an Arduino and some LEDs but it clearly shows when things are being triggered.

    • #1941 Reply
      Avinash
      Guest

      I have ordered valves and RCA/Phono jacks online which may take some time to get delivered so meanwhile I’m trying to test the camera (shutter+focus) connection circuit alone with D10 & D11, which is tested okay with those LEDs. So I’m testing camera connection to the stereo socket without waiting for valves circuit to be ready. I did it to make sure stereo socket is connected rightly with camera trigger cable, as I was confused to see 5 pins on the socket(I do not come from electronics background). does this test make any sense? or should I test it later only when valves and RCA/Phono jacks are available with me. while doing this test camera is fired but not always when I click start button on Android app.

    • #1942 Reply
      Martyn
      Keymaster

      The test makes perfect sense and it would be one less thing to worry about later.

      Have a look at http://www.martyncurrey.com/activating-the-shutter-release/. This deals with only triggering a camera and may help.

      Research the shutter release cables for your camera and, if not already, take a look at http://www.doc-diy.net/photo/remote_pinout/

    • #1943 Reply
      Avinash
      Guest

      alright. Thank you very much for this again. cheers

    • #2222 Reply
      Leszek
      Guest

      Hi Martyn.
      It’s very nice idea and implementation.
      I was looking for something like that and finally found it.

      That’s why I made the drop controller, I’ve uploaded a progam and almost everything works fine except for the shutter button. I use Canon Rebel XSI and Canon 7D, and both have the same problem, that is, the shutter release and sometimes (sporadically) the flash do not work. I checked the wires, the sockets on the board because I thought that something is not in contact somewhere, but here everything is ok.
      Most often, the shutter does not work after changing the settings in the application and camera settings.
      I installed the LEDs as in dropControllerBT on a breadboard and the LEDs each time correctly signal the work of the triggers, and yet the shutter and sometimes the flash do not work properly. I changed the flash trigger pulse and camera trigger pulse times, but it did not help (LEDs last longer)
      Do you know what could be the reason for this?

      Best regards Leszek

    • #7296 Reply
      SpiroC
      Guest

      I have also a lot of problem whit camera not triggering every time so because we use flash to frizz the action i don’t see point of mirror lock up so i modified the code in makeDrops.ino and disabled line 72 and 75 and then enable MirorLockup on the application so this weak up camera every time and now i never have problem whit camera not triggering

    • #7297 Reply
      Martyn
      Keymaster

      @SpiroC.

      This would mean you are using mirror lockup to activate the focus on the camera as a wake up trigger. Hadn’t thought of this. What camera do you have and what mode are you using it in? Can you adjust the sleep time, make it longer?

      You are correct about mirror lock by the way. It was left in from the days when the dropController was a multi-function trigger. I plan to remove it in the next version but that is a long way-away. Or maybe I can rename it to Wake-up Trigger…

    • #7298 Reply
      SpiroC
      Guest

      I have canon eos800d i cannot change the sleep time it’s on manual mode manual focus 500ms exposure and it’s work like a charm

    • #10170 Reply
      SpiroC
      Guest

      Update on camera trigger problem
      I was playing whit camera i flash sync and for my canon eos 800d/EOS Rebel T7i
      the Camera trigger pulse need to be set at 170-180ms so the camera trigger every time and all so the camera shutter lag was around 80ms
      so i manage to sync flash and camera triggered from controller at 1/160
      And just for info if u set camera to trigger at 200ms the camera trigger pulse and shutter lag are add to the time so shutter will be fully open at
      camera triger + camera pulse time + shutter lag = 200ms + 180ms +80ms 460ms

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