taurus81 Can the camera be connected as if it were a dew heater or flat panel which are adjustable and adjust the voltage to 7.4V?
No!!!
The ASIAIR's "variable DC" output is not DC.
It is a PWM output that is rectangular wave modulated between 0V and 12V, with a duty cycle that provides an average output voltage. The camera will see 12V, and will likely to self destruct.
Chen