Gerrit (forum user) built a panel that controls 8 motor faders.
The panel uses L293B H-bridges to drive the motors. The fader wipers and touchtracks are connected directly to the Teensy. Each faders has it’s own PID control using 12 bit PWM at 14648.437 Hz. A second Teensy is reading the values from the faders via I2C and shows the raw values on the LED displays.
This project makes use of the ResponsiveAnalogRead. Gerrit notes that he’s found the performance to be pretty good. The faders can move fast and he’s been able to get very little overshoot, even at high speed.