An automatic table tennis ball server is designed by using infra-red sensor and a few electric devices.

利用红外光传感器和较少的电子器件，设计了一种乒乓球全自动供球器。

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A new method for measuring the 3D motion of balls in angular contact ball bearings fitted with a magnetized ball is proposed, in which Hall Sensor is fixed to its outer ring and cage side face.

提出了通过在装有一个磁化钢球的轴承外圈及保持架侧面配置霍尔传感器，测量钢球三维运动的新方法，阐述了该测试方法的基本原理；

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The invention relates to a ball-and-socket joint with an integrated Angle sensor, particularly for use as vehicle level sensor in the running gear of a motor vehicle.

本发明涉及一种集成有角度传感器的万向球接头，尤其用作汽车底盘里的汽车水平传感器。

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With finger on sensor, I inhaled and exhaled while following a bouncing ball on the screen, "breathing from the heart, " as the instructions told me.

WSJ: Keep Calm and Carry a Gizmo

Different from Wacom's capacitive Bamboo Styluses available for iPad, iPhone and other touchscreens, the Bamboo Stylus feel delivers a powerful combination of "active" pen and sensor technology for a digital pen experience that emulates the feel of a traditional ball-point pen or pencil.

ENGADGET: Wacom outs the Bamboo Stylus Feel for adequately equipped devices, ships January 7th from $40

The robot ball itself is equipped with a gyroscope, accelerometer and Blu-tooth sensor.

FORBES: CES: Holy iPhone-Controlled Robotic Balls! (Video)