Hoping to find out if we can take an exposure by sending a 12V pulse, contact closure or mech

Hi and thanks in advance for your help. I am hoping to find out if we can take an exposure by sending a 12V pulse, contact closure or mechanical contacts at each position? I have, with a lot of help built my own 360 spin image shoot turntable. My technical expertise is limited so I have a very clever guy helping me connect the turntable using a stepper motor and programmable driver. We can create up to 12 different pre set shoot options but for now I am happy to just set up for the camera to fire off every 10 degrees. My guy basically has asked me to try to find out the triggering plus rate Canon use to fire the camera using the remote cable plug/pin? He seems to favour a pause rate at 12 volts, can anyone answer this tricky question? Cheers Barry