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This design introduces a new table tennis serve fully automatic controller, can achieve arbitrary direction of table tennis serve, the ball speed controllable and adjustable service rate. System USES AT89C51 primarily control chip, LCD1602 as a display device, motor driver with H bridge circuit, position sensor and scanning the keyboard, the three dc motor speed regulation, to control the direction of firing table tennis serving machine, speed of table tennis ball, and serve. Final inspection through circuit simulation test and practice, serve the ball controlled adjustable direction, speed and rotational speed, and can realize the early, middle and high three mid-range, more can satisfy the professional athletes and hobby table tennis expert of special training.
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