资料介绍
AN1828 PIR（被动红外）探测器使用的ST7FLITE05/09/SUPERLITE
AN1828
APPLICATION NOTE
PIR (PASSIVE INFRARED) DETECTOR USING
ST7FLITE05/09/SUPERLITE
INTRODUCTION
The document explains how to design a low cost PIR detector (human motion detector) using
the ST7FLITE05(09) microcontroller family. The technique used is software Sigma-Delta A/D
Conversion, suitable for detecting low-frequency sensor signals. Refer to AN1827 for a de-
tailed explanation of the Sigma-Delta technique. The same concept can also be used for other
sensor applications such as:
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