I'm making a new soccer robot. I've tried on the ADC (0804 & 0809).

In the previous robot, all the sensors have only "ON" and "OFF". Visible Light, IR.

Now I'm trying to make "proximity" sensors. Ultrasonics or IR, either of them. (to replace the push bottons on the front)

Having a 89C2051 to work as a "filter" against fault reading of sensors, the robot don't know, for example, what's the distance between the ball/wall and itself.

Is an ADC the only way to do the ranging?

Stanley