Lil Bang – Sound trigger for cameras

Viktor made a sound trigger for his DSLR camera:

Now that I can take pictures of lightning I decided that I also want to be able to trigger my camera with sound.

An op-amp filters and amplifies a microphone signal. The output is fed to a PIC microcontroller that triggers the flash when the sound reaches a certain level. The trigger sound level and shutter delay are set with a pot.

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4 Comments

  1. Sorry to nitpick, but will this work for lightning that is far away; sound would take a few seconds to reach the camera, and all the camera would capture is a black sky. But I suppose this could easily be modded to take an LDR/photocell input instead of a mic, and make the cam respond to the flash of lightning.

    Good job on the acrylic ‘case’. Very neat.

    1. sorry, for the confusion, another project is for lightning shots, I think its called big bang, on his site. This one is for taking pics of objects colliding close to the camera.

      1. Rohit, Filip: I am the author of the original article. I may have been confusing, probably because of my English… Sorry about that. To clarify: this circuit is a sound trigger and not for lightning. For lightning I had created another circuit, which I called “Zeus” (not big bang – it was gonna be a pun, obviously failed…) and can be found here: http://diy.viktak.com/2011/03/zeus-lightning-trigger-for-cameras.html
        Should you have any questions, please send me a mail or leave a comment on my site. Thanks!

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