This might be a pretty good way to control a servo. The pot on the left would be your input and the one on the right would adjust the center.
You could also attache a wind vane to the one on the left, use the one on the right to trim for center, use the output to control an auto pilot motor on a sailboat.
The boat would turn to maintain its course with reference to the wind.
I'm thinking about trying this on my boat.
I changed the polarity of the OP amps and in doing so I removed the majority of the idle current
Any thoughts would be helpful. :-)
