PIR Motion Sensor - How It Works, Applications & Benefits
Explore the world of PIR motion sensors, learning about their working mechanisms, components like the sensing element and decoder chip, applications in human detection, and why they are easy to use and affordable at just $7 online. Discover the use of infrared wavelengths for thermal imaging and heat-seeking missiles, as well as the practical examples of circuits incorporating PIR sensors.
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Presentation Transcript
PIR Motion Sensor
What is it? PIR -- Passive Infrared Can buy online for $7 Easy to use
How does it work PIR Sensing Element Fresnel Lens Decoder Chip
PIR Sensing Element IR Sensing 8 15 ?m wavelength used for thermal imaging 3 8 ?m wavelength used for heat seeking missiles Window designed for 7 14 ?m wavelength ^ http://www.ladyada.net/media/sensors/RE200B.pdf
Decoder Chip ^ http://www.ladyada.net/media/sensors/BISS0001.pdf
Applications Motion sensing Human Detection Not ballistic heat-seeking missiles
