Thank for your help ;)
The range of the paddle don’t change. The ball always goes to the opposite side. I notice when paddle is unpluged, scope displays the ball that changes side continuously, like if the players always pushed the button. But same thing, ball goes in the wrong way.
I have good voltage on ADC lines from 0 to 5v when I turn the knob. Other thing, at the serve :
at the left side, ball goes on upper left.
at the right side, ball goes to bottom right.
Both paddles share the same vcc and gnd. It’s good ?