Hi.
I want to build a mount for my dish antennae on a plate that would rotate to position it. I thought of using a stepper motor and since I could not see the antennae because it would go on the roof I was thinking about a way to make it easy to position to a known direction without looking at it and without using a computer to do so.
I had this idea, using 2 trimpots, one on the axis of rotation of the antennae and the other on my desk, and use a comparator or some other simple electronic device to determine the difference of voltage on the trimpots and then send pulses to turn cw/ccw to the stepper to equalize the voltages wouldnt it be like "pointing" the antenna with the trimpot on my desk? Depending on the output of the comparator pulses from a 555 would be send to the stepper controller.
If you know of a ready made device for what I am describing here please let me know.