I'm not an electronics expert but I assume the following diagram is fine to use as a trigger for the Sony A57 camera using a PC817 optocoupler and a 220 Ohm resistor?
I opened up the remote and theres no passive components, just a push switch which shorts shutter to ground.
Thanks.
Your "PC817 op amp" looks more like an opto isolator than an op amp
Oops. Yes I actually meant coupler. Doh. Will edit.
That should work.
Use 5 volts and ground to light up the optoisolator LED, no need to involve the Arduino at this point. Then the only thing that could go wrong is blowing up the opto, which prolly won't happen.
a7
5v will come from pin 5 wont it when its set to high? I assume 220 Ohm is ok for the optoisolator?
For context, the arduino is going to control a servo which turns an object in shot, stops, take a picture then repeats every few seconds.
Yes.
I assume 220 Ohm is ok for the optoisolator?
Yes
Don't connect the 817 input or output backwards.
Pin 3 -> ring (gnd)
pin 4 -> tip
Yes, if it is in OUTPUT mode.
My point was to suggest that in case you were at all nervous or clumsy or unlucky, you could leave the Arduino out of the picture as you confirmed the operation of the relatively inexpensive optoisolator.
Just part of the divide and conquer approach, useful eveywhere.
a7
It is considered bad manners to revise a post that has already been commented on unless the fact that it has been edited is made obvious as it can make a nonsense of comments on it, as in this case. Please never do that again
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