Monday, February 13, 2012

Lil Bang (Sound Trigger for Cameras)


Introduction

Now that I can take pictures of lightning I decided that I also want to be able to trigger my camera with sound. The design I came up with has the following features:
  • Controlled by a PIC micro (PIC16F886).
  • Adjustable sensitivity
  • Adjustable delay – i.e. the user can set how many milliseconds after the sound event the picture should be taken. (My uncle says it would be a lot better if there was a setting to define how much BEFORE the event it should trigger the camera – but that’s another project – for my Nobel prize later this year…J)
  • Operated from battery and/or external power brick.
  • Completely decoupled from the camera by opto couplers, so that no harm can be caused by the circuit to the camera.
  • Can be used with any camera that has a remote control input (direct, IR or otherwise).
  • Can also be used to trigger any other electronic device, e.g. flash

Meet Lil Bang - little bro of the Big Bang :)