30-35 years ago, I was "into" electronics and my Father photography. We combined our skills (ok, his cash and my soldering iron) and came up with the following:
If I recall correctly, on the sound operated trigger, a 2.5mm jack pluck was fitted to the unit, with the other end fitting to the PC socked of a flash gun.
Back then (late 70's) Dad was using a Praktica film camera - I recall him opening up the shutter and the sound of a baloon busting from a dart, would trigger the flash. The shutter was then closed.
The IR Beam comprises the two units; a transmitter and receiver, with an invisible IR beam between them. The units have a 1/4" thread in the base which allowed them to be mounted on a short steel spike, pushed into the back yard lawn. I cant recall if (again a 2.5mm jack lead) it triggered a flash gun or the camera (he might of gotten the Canon A1 by now). I fondly recall him setting the beam up to capture a fox visiting the garden - but he only managed to capture the neighbours cat
The transmitter has a variable potentiometer fitted and the receiver has a 3-way rotary switch.
The above were recently retrieved from my parents attic and I'd like to see if they can be put to use. I'll need to replace both battery leads and one of the battery holders.
Q's
Would the above be able to trigger the camera (a 7D) direct - which of the 3 pin connections would I use (thats assuning the trigger is a short rather than a voltage) ?
What might the 3-way rotary switch be fore on the IR receiver ?
Hopefully, my Dad will be able to find the copies of the magazines that we made the units from. In the mean time, I would appreciate some pointers on the above (as I gave up electronics for engineering a long time ago).
Regards
Lawrence
