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DIY:一个红外线感受器实验

A Passive Infrared Sensor (PIR) Project

A PIR, or passive infrared sensor, is a device that detects changes in infrared radiation emitted by objects, commonly used for motion detection in security systems, automatic lighting, and other applications. (From Gemini).

A PIR sensor can be used in a microcontroller project to trigger some actions such as a door open, a camera shutter release etc.

In this project, a PIR sensor senses the IR from a hand, sends an input to an optocoupler which triggers the release of power of a red LED light.

红外线感受器：

背面：

人体都有红外线的发射，红外线感受器能感受到红外线的存在，

经过处理放大后就以直流1点几伏的输出给下面的线路， 下面的线路经过光学联系器让后面的发光二极管得到电压而发出光。

https://www.youtube.com/watch?v=3EEiykYvFOM