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Originally Posted by seanwitte
This is from my personal experience with the code and camera on the mini-RC. There are other (and probably better) ways to do this, but I know it works. The code worked perfectly out of the box once I got the camera set up. The TTL convert has four inputs, but the mini-RC only has three pins on the TTL port. The fourth pin, which is missing, is for +5V to power the TTL converter board. I had to cut one end off of a PWM cable, solder a header pin to the red wire, and plug that into the open slot on the TTL board. Cut about 1" off of the black and white wires to give yourself some room to work. You could also use a piece of resister lead for the pin if you don't have any header pins. Heat shrink the solder joint so that no exposed metal pokes out when you plug it into the TTL converter board.
1) Connect a PWM cable from the TTL port on the mini-RC to the inputs on the TTL converter board so that the black lead matches B on the board.
2) Connect your hacked cable with the power pin to a PWM output or digital/analog input. The red pin will pull +5V from the port.
3) Connect the pin on the red cable to TTL converter board. It will be the open slot opposite the one marked B.
4) Connect a PWM cable from the TTL converter to the camera's RS232 input.
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Thanks! That's exactly what I needed to know. Now I can pass that on to my electronics guy!