I'd like to use an Arduino electronic board with a Nikon D7000 to automate the capturing process (i.e. rotate an object by stepper motor, make a capture, new rotation and so on). I decided to trigger the camera via IR channel putting an IR LED on my Arduino board (I already found IrDA protocol for Nikon). But how can I make sure that the photo was taken? The internal camera flash will be popped up to trigger remote SB-900 and SB-600, so I won't have access to a hot shoe (however if I did, I don't have such a connector).
My only solution for the moment is to put a photo diode on the electronic board to measure the light from the flashes. But it also doesn't appear to be so simple
Did I miss a more convenient way to the accomplish this? I know that the SB-900 has two connectors but I don't have the part to connect to it. May be cheap radio transmitters will help me? Do they have electrical sync output?