hello i do not have a schematic as i have failed to make anything as of yet, but maybe i can elaborate ...i took apart a little servo for an RC car ..the servo has a dual potentiometer inside that acts like the two circuits above
clockwise = 0 + 3.6k
central = 1.8k + 1.8k
anticlockwise = 3.6k + 0 ohms
i hope to replace this dual potentiometer with a slider, so the slider controls the servo circuit, and then i connect the servo circuit to the slider as it is a motor type slider. then i can control the motorslider via pwm.
So the problem is that the slider is an 11k linear potentiometer which is nothing like the servos dual potentiometer. So I am trying to convert the 11k slider into a simulation of the servos dual pot. Then the servo will be fooled into thinking it is controlling its own motor on the servo, when really it will be linked up and controlling the sliders motor instead. : P