How about get a monkey with a paddleball? Put a stretch sensor instead of a rubberband. When the ball hits something, it bounces and hits the monkey. The monkey screams, and you use the last measurement from the sensor to tell the distance!
How about get a monkey with a paddleball? Put a stretch sensor instead of a rubberband. When the ball hits something, it bounces and hits the monkey. The monkey screams, and you use the last measurement from the sensor to tell the distance!