ESP32 tutorial A-06: Photo-resistor

ADEL KASSAH
16 Jan 201802:32

Summary

TLDRThis tutorial introduces viewers to connecting a photoresistor to an ESP32 microcontroller, suitable for beginners. The video outlines the necessary components and wiring, emphasizing the analog input functionality, which provides values between 0 and 4095. It demonstrates how to read sensor values in real-time using a serial monitor, showcasing changes in light intensity. Viewers are encouraged to experiment further, as the tutorial sets the stage for more complex projects involving light-controlled variable resistors. The presenter invites viewers to explore and enjoy the learning process.

Takeaways

  • 😀 This tutorial covers connecting a photoresistor to an ESP32.
  • 😀 A link to the full tutorial series is available in the description.
  • 😀 The photoresistor acts as a light-sensitive variable resistor.
  • 😀 Beginners can opt to purchase a convenient module instead of individual components.
  • 😀 Connections include the S pin to an analog pin, and ground to ground.
  • 😀 It's possible to create a DIY module with a photoresistor and a 10k resistor.
  • 😀 The ESP32's analog input is coded into 12 bits, allowing values from 0 to 4095.
  • 😀 A delay is implemented to read sensor values every second.
  • 😀 The sensor values change with varying light conditions, reflecting these changes in real-time.
  • 😀 The tutorial sets the stage for more complex projects in future videos.

Q & A

  • What is the main topic of the tutorial?

    -The tutorial focuses on connecting a photoresistor to an ESP32 microcontroller.

  • What kind of project will be built using the photoresistor?

    -A light-controlled variable resistor project that is sensitive to light.

  • What is suggested for beginners who may not have the photoresistor component?

    -Beginners can purchase a convenient module that includes the photoresistor.

  • How should the photoresistor be connected to the ESP32?

    -The S pin of the photoresistor should be connected to any of the analog pins, and ground to ground.

  • What is the range of values that the analog pin on the ESP32 can output?

    -The analog pin on the ESP32 outputs values ranging from 0 to 4095.

  • Why is a delay introduced in the program?

    -A delay is introduced to read the sensor value every second.

  • Where should the code blocks for reading the sensor values be placed?

    -The code blocks should be in the main loop to continuously check for new sensor values.

  • What does a value around 1800 indicate?

    -A value around 1800 indicates normal lighting conditions in the room.

  • What happens to the sensor value when the sensor is covered?

    -When the sensor is covered, the value decreases.

  • What effect does shining a flashlight on the sensor have?

    -Shining a flashlight on the sensor increases the sensor value.

Outlines

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Mindmap

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Keywords

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Highlights

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Transcripts

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Étiquettes Connexes
ESP32PhotoresistorElectronicsDIY ProjectsBeginner TutorialAnalog InputSensor ReadingArduinoTech EducationLight Control
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