Not sure if adding to this post is better than starting new thread?
My app - now using ixus160-elph160 - requires external power. This thread helps me go forward.
I could make the servo setup to physically push the button as described by reyalp. But shorting power switch to force on when cam has power seems better, trying to do similar technique as mentioned in post #8.
The switch contact mechanism is a domed, springy contact embedded in the white plastic. I guess it momentarily completes the circuit when pressed. Functions like a toggle switch. Press down once, ON. Press down once again, off.
So.. I will try to probe with ohm meter, no power at camera, to see which wires are used for the switch.. then, try to solder wires to the camera switch wires so they could be run outside the camera. Then, just "touch those wires together for .5 sec" to turn on. Do same to turn off.
If anyone sees obvious flaws with this approach, I'd appreciate the feedback.
Edit: correct the image url
