Difference: SwitchesWithESP32 (2 vs. 3)

Revision 32023-11-27 - UliRaich

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META TOPICPARENT	name="Slides"

Lecture 3: Switches

CSC 321: Embedded Sysytem

First Semester 2020/2021

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• Also if you connect a PIR(passive infrared sensor) to a digital input, it can detect the infrared (IR) light radiating from objects in its field of view.

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• MicroPython makes it just as easy to use a pin digital inputs as it does outputs.

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• MicroPython makes it just as easy to use a pin digital inputs as it does outputs.

The Push Button

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• Infrared in this range will not pass through many types of material that pass visible light such as ordinary window glass and plastic.

• However it will pass through, with some attenuation, material that is opaque to visible light such as germanium and silicon.

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PIR Sensor Features

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PIR Sensitive Crystal

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There are two important materials present in the sensor:

The pyroelectric crystal which can detect the heat signatures from a living organism (humans/animals)

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META FILEATTACHMENT	attachment="pir.png" attr="" comment="" date="1622084724" name="pir.png" path="pir.png" size="892857" user="IsaacArmahMensah" version="1"
META FILEATTACHMENT	attachment="pushbutton.png" attr="" comment="" date="1622084739" name="pushbutton.png" path="pushbutton.png" size="790942" user="IsaacArmahMensah" version="1"
META FILEATTACHMENT	attachment="pullup.png" attr="" comment="" date="1622086614" name="pullup.png" path="pullup.png" size="369116" user="IsaacArmahMensah" version="1"
META FILEATTACHMENT	attachment="PIR-Sensor-Image.jpg" attr="h" comment="" date="1622087612" name="PIR-Sensor-Image.jpg" path="PIR-Sensor-Image.jpg" size="34974" user="IsaacArmahMensah" version="1"

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META FILEATTACHMENT	attachment="pir.png" attr="" comment="" date="1701077685" name="pir.png" path="pir.png" size="327085" user="UliRaich" version="1"
META FILEATTACHMENT	attachment="pushbutton.png" attr="" comment="" date="1701076202" name="pushbutton.png" path="pushbutton.png" size="158169" user="UliRaich" version="1"
META FILEATTACHMENT	attachment="pullup.png" attr="" comment="" date="1701077279" name="pullup.png" path="pullup.png" size="2079" user="UliRaich" version="1"
META FILEATTACHMENT	attachment="PIR-Sensor-Image.jpg" attr="" comment="" date="1701077370" name="PIR-Sensor-Image.jpg" path="PIR-Sensor-Image.jpg" size="51228" user="UliRaich" version="1"

META FILEATTACHMENT	attachment="pir_3.png" attr="h" comment="" date="1622087625" name="pir_3.png" path="pir 3.png" size="514394" user="IsaacArmahMensah" version="1"
META FILEATTACHMENT	attachment="pir_2.png" attr="h" comment="" date="1622087636" name="pir_2.png" path="pir 2.png" size="445288" user="IsaacArmahMensah" version="1"
META FILEATTACHMENT	attachment="pir1.png" attr="h" comment="" date="1622087646" name="pir1.png" path="pir1.png" size="89355" user="IsaacArmahMensah" version="1"

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META FILEATTACHMENT	attachment="pir_back.png" attr="" comment="" date="1701077688" name="pir_back.png" path="pir_back.png" size="344701" user="UliRaich" version="1"

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