Is anyone familiar with the electronics of Nikon SLR cameras? I have the
following problem: In principle, most of these cameras (at least my F75 and
D100) can be remotely controlled by an IR remote control. They have an IR
sensor that responds to a IR signal sent from the remote control which has
the same effect as pressing the shutter-release button. There is no data
transmission other than this one signal, so it shouldn't be complicated. I
don't want to use a remote control, but instead want to construct a system
that shoots one photo automatically any few hours.
First i asked Nikon about the trigger signal, but they just answered, they
won't say.
Then i tried it with square waves at an IR LED and any frequency, pulse
width, duty cycle etc. The camera never responded.
Then i wanted to buy a simple remote control (called ML-L3) just getting the
answer that it is obsolete.
Searching the interet also gave nothing useable.
Now my question is: Does anyone know how this remote signal has to be? Or
does anyone have the remote control and maybe could try it with a
phototransistor connected to an oscilloscope. I'm especially interested to
know whether it is just a continuous wave signal with specified frequency
etc., or it is something more complicated like a digital serial bit-by-bit
coding?
Thank you very much!

Steffen

-- 
Author: Steffen Maisch
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