Welcome back to “Mind+ and ESP32: A Journey of AIoT Enlightenment for Kids”!
In Lesson 6, “Knob Light”, we explored the mysteries of analog signals and achieved precise control of light brightness through a knob.
👉 To review Lesson 6, please click: “Knob Light: The Art of Brightness at Your Fingertips, Mastering Stepless Dimming!”
Lesson 7: Sound Level Meter
Sound is everywhere, but how do we quantify the sounds around us? In this lesson, we will start from a small environmental issue and transform the intangible sound into concrete numbers, creating a monitoring device that can display the environmental noise level in real-time, becoming a little scientist who understands the sound environment.
【Task Objectives】
Use a sound sensor and a four-digit display to create a sound level meter:
Real-time monitoring of sound intensity in the environment
Clearly display the current noise value on the four-digit display
【Core Knowledge Points】
Advanced Analog Input: Using a sound sensor to collect continuous analog signals
Four-Digit Display Driving: Learning to use driver chips like TM1650 to control the display
I2C Communication Protocol: Understanding the roles of SDL and SCL pins, mastering the connection methods for bus devices
Data Processing and Display: Mapping sensor data to an appropriate range and achieving stable display
【Extended Challenges】
Noise Alarm: Automatically light up a red LED for alarm when the detected noise value exceeds 200.
Sound and Light Interaction: Based on the light alarm, how to add a buzzer for sound alarm to create a complete reminder system?
Thought: What changes will occur in the display of the digital tube if the “clear screen” command is not used?
【Next Lesson Preview】
Lesson 8: Distance Meter: Using Ultrasonic Waves to Perceive the World and Create an Accurate Distance Meter!
We will unlock the ultrasonic sensor and use the principle of sound wave reflection to measure distances accurately, creating a practical and magical electronic ruler.
【Course Overview Roadmap (7 Stages)】
Basic Perception · Exploring Smart Hardware (Lessons 1-10)
Comprehensive Creation · Transforming into Little Inventors (Lessons 11-20)
Internet of Everything · Opening the Door to Remote Control (Lessons 21-30)
Mobile Platform · Creating My IoT Car (Lessons 31-40)
Web Empowerment · Building a Dedicated Smart Control Center (Lessons 41-50)
AI Enlightenment · Giving Machines a Pair of “Wise Eyes” (Lessons 51-60)
Scientific Innovation Practice · Exploring the Scientific World with Technology (Lessons 61-70)
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【Ant Innovation Space Course Material Directory】 Keywords: Arduino, Air Board, Esp32, Artificial Intelligence, Internet of Things, Mind+, etc.
Say goodbye to hardware switching and high costs! This set of “ESP32+Mind+” innovation courses (70 lessons) takes students from zero to AIoT!【Course Recommendation】 “Silk Road Smart Travel: From Historical Codes to AI Programming” – A new STEAM innovation course that blends history and technology is now online! (Mind+ Air Board K10)【Course】 Super Awesome Mind+ (Scratch) and Arduino Interactive Course (20 exquisite PPTs)【Highly Recommended】 40 lessons of Arduino System Course (PPT + Source Code) released, easily mastering smart hardware teaching with Mind+!