The greater the intensity of the light, the more voltage the Arduino sees at the connected pin.

光照越强，Arduino 在连接插脚处读取的电压越多。

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The experimental system used a LD as light source, a PIN as detector, and a PC to acquire output signal and data process.

实验系统采用LD为信号光源，PIN管为光电检测器，并利用PC机对信号进行数据采集和处理。

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A high-power laser diode module is used as the light source, and a PIN photodiode with high performance is used as the photo-detector.

以高功率半导体激光器作为光源，同时采用高性能的PIN型光电二极管作为光电探测器。

youdao

Peering upwards looking for a flitter of action, the only movement was the pin prick of light from a satellite as it tracked across the starry sky.

BBC: NEWS | UK | Scotland | Highlands and Islands | Seeking 'a wet slap' in the dark

It is not this light precise pin prick that many Americans believe.

BBC: Is Obama's drone doctrine counter-productive?