Help!: Any Idea on how to Create Sound Trigger

[kmohoruk]

Hello, I am a student in the photo-imaging program at langara college.

I am currently doing a science option for one of my classes and i have to create a sound trigger for a 20D Canon camera.

Does anyone have any idea on where I can get some information/specs on creating the device (I cant just go out and buy one). it has been hard finding any information on this subject and i figured this would be the best place to start looking for help.

Thanks!

Kris

[ben_r_]

A sound trigger? Youre looking to trip the shutter by some sort of frequency? What kind of sound were you thinking of?

[DC Fan]

Here's one company that makes a trigger that it says can be used for sound triggering. (http://www.woodselec.com/index.htm)

Here's another company that makes a device that can be used as a sound trigger. (http://www.doc-diy.net/photo/smatrig/)

Here's a company that sells sound trigger kits. (http://hiviz.com/index.html)

[Mazu]

Hiviz also has instructions for DIY:
http://hiviz.com/tools/triggers/makeown.htm

A friend of mine helped making a trigger for me, can't remember which one it is but there are many DIY pages available for sound triggers, just google it.

Here are a few test pics:
http://www.flickr.com/photos/mazu/2230901229/
http://www.flickr.com/photos/mazu/2231694956/
http://www.flickr.com/photos/mazu/2230901293/

[TheBurningCrown]

On my 350d a microphone worked for me.

Not the most complex of things and it was set off quite easily, but depending on what you're doing it might work fine for you.

[mhall711]

Like "the Clapper" for your camera! Brilliant!!