Click on the arrow“blue text”, and follow us! Photoresistor Also known as light-dependent resistor (LDR), it is a semiconductor resistor that is sensitive to light. Its core characteristic is quite interesting: the stronger the light, the lower the resistance; the weaker the light, the higher the resistance, functioning like an “electronic valve” that can automatically … Read more
☆ Design Hardware Composition: STM32 microcontroller minimum system + RTC clock module + HC-SR04 ultrasonic sensor + photoresistor sensor + LCD1602 display + AT24C02 storage chip + lighting circuit + button settings + buzzer + red LED light 1. This design uses the STM32F103C8T6 microcontroller as the main control chip; 2. Real-time display: The LCD1602 … Read more
Smart Robot Club Learning Arduino Course On March 17, 2024, at 2 PM, the Smart Robot Club held a learning session on Arduino in classroom A207 of the School of Electrical and Electronic Engineering. After an orderly sign-in, the club activities officially began. 01 During the activity The club members divided into several groups to … Read more
Arduino Sensors: HS-S01A Infrared SensorArduino Sensors: HS-S02P Infrared Sensor (Obstacle Avoidance)Arduino Sensors: HS-S03P Ultraviolet SensorArduino Sensors: HS-S05P Sound SensorArduino Sensors: HS-F07P Active BuzzerArduino Sensors: HS-S08P Flame SensorArduino Sensors: HS-S09LB Raindrop SensorArduino Sensors: HS-S09PC Soil Moisture Sensor Arduino Sensors: HS-S10P Fog Sensor Arduino Sensors: HS-S11-L Gas Sensor Arduino Sensors: HS-S20P Ambient Light Sensor Arduino Sensors: HS-S21P … Read more
1.Hardware Introduction The photoresistor is a special resistor made from semiconductor materials such as sulfide or selenide, and its working principle is based on the internal photoelectric effect. As the light intensity increases, the resistance value rapidly decreases. The charge carriers generated by the light participate in conduction and drift under the influence of an … Read more
Experimental Scene and Circuit Connection Recently, I found online that a teacher published a paper in a journal, using the voltammetry method to measure the resistance of a photoresistor while measuring light intensity with a light sensor, then plotting the relationship curve of photoresistor resistance and light intensity in a spreadsheet. The steps are cumbersome … Read more
Experimental Scenario 1 Introduction Recently, while reviewing exam papers, I encountered an innovative question based on photoresistors. Inspired by this, I decided to design a clever experiment using Phyphox and ESP32 to see if I could measure my own heart rate. 2 Design Idea Utilizing the combination of Phyphox and ESP32 to measure the resistance … Read more
Recently, we conducted an experiment to explore the relationship between the current of a photoresistor and light intensity. The photoresistor and a voltage divider resistor were connected in series, powered by the 5V output of the ESP32. We used pin IO33 to collect the voltage across the voltage divider resistor and calculated the current through … Read more
Recently, the Micro Master has been dedicated to conducting innovative experimental research using Phyphox and ESP32 Bluetooth, accumulating a lot of experience while also facing numerous challenges. On October 7, 2020, I sought help at the Clockwise Rubik’s Cube Club led by expert Li Lu from the Maker Education Teacher Studio in Jiaozuo City. I … Read more
Hey everyone, I’m your old friend Secretary Jiang. Today, I’m bringing you an interesting project—an automatic light control system based on a photoresistor. Just the name sounds high-tech, right? In simple terms, the light turns off when it’s bright and turns on automatically when it’s dark. We’ll use a Siemens PLC to implement this function, … Read more