Re: [photo-3d] Re: lightning trigger

[Ron Beck <rbeck@xxxxxxxx>]

Actually, it's my poor memory which can't remember what type of sensor
the circuit design was for.  Thus, if it's for light (i.e. lightning or
strobe) it would probably work okay.  If it's for sound, obivously you
wouldn't get a lightning strike if the shutter didn't fire until the
thunder rolled around!

The more I think about it, the more I tend to think that it was a sound
activated device (wouldn't work for lightning) which was used for high
speed photography of things like gunshots or balloon pops.  In these
cases, the sound would travel to the receiver much more quickly than the
balloon could pop and so would be "frozen in the moment".

Still, there ought to be a way to trigger a camera with a light-sensing
device.  A good way to test would be to use a strobe and see if the
device could capture the flash.  I'm going to keep looking!  This
conversation has stirred my investigative instincts.

Regards,
Ron

allanwx@xxxxxxxxxx wrote:
> 
> --- In photo-3d@xxxxxxxxxxx, Ron Beck <rbeck@xxxx> wrote:
> > I know I've seen circuits that you can build that will sense a flash
> > (lightning) and trigger the camera.  I'll have to do some "surfing"
> to
> > see if I can find it again.  Or, maybe I'm thinking about some sort
> of
> > sound-activated trigger.  Can't quite remember right now.
> >
> > Regards,
> > Ron
> 
> The idea of using a sound-activated trigger to photograph lightning
> reminds me of an addendum to a biology slide show I saw in college.
> The presenter showed his "After the Lightning" pictures at the end of
> his presentaion.  He stood on a bluff and watched for lightning and
> as
> soon as he saw it he clicked the shutter.
> 
> What is the speed if light again?  What is the duration of a flash?
> 
> When the clap of thunder comes rolling along, we'll click the
> shutter.
> I like that idea - reminds me of how administrative policies are set
> -
> but that's another post to a different list.
> 
> allan-"Dilbert"-wx