Design with Ambient Light Sensor in Cirkit DesignerThe CQRobot TSL25911FN Ambient Light Sensor is a highly sensitive device designed to measure the intensity of light in the surrounding environment and convert it into an electrical signal. This sensor is ideal for applications requiring precise light measurements, such as in smartphones, tablets, and other portable devices, as well as in industrial and environmental monitoring systems.
This circuit utilizes a Photoresistor (LDR) sensor to measure ambient light levels and display the results on a 16x2 I2C LCD. The Arduino UNO processes the sensor data and updates the LCD to indicate whether the environment is 'Light' or 'Dark' based on the calculated lux value.
Open Project in Cirkit Designer
This circuit features an Arduino Nano microcontroller interfaced with an APDS-9930 Proximity and Ambient Light Sensor for sensing environmental light and proximity. The Arduino Nano also controls an Adafruit Quarter 60 NeoPixel Ring, likely for visual feedback or display purposes. The sensor communicates with the Arduino via I2C (SDA and SCL connections), and the NeoPixel Ring is driven by a digital output (D8) from the Arduino.
Open Project in Cirkit Designer
This circuit integrates an ESP32 Wroom microcontroller with an APDS-9930 Proximity and Ambient Light Sensor. The ESP32 provides power to the sensor and communicates with it via I2C, using its GPIO21/SDA and GPIO22/SCL pins for data transfer. The circuit is designed to measure proximity and ambient light levels, which can be processed and utilized by the ESP32 for various applications.
Open Project in Cirkit Designer
This circuit connects a Raspberry Pi 5 to an ambient light sensor. The Raspberry Pi provides power and ground to the sensor, and communicates with it using I2C protocol through GPIO pins 2 (SDA) and 3 (SCL), with an interrupt line connected to GPIO pin 4.
Open Project in Cirkit Designer| Parameter | Value |
|---|---|
| Manufacturer | CQRobot |
| Part ID | TSL25911FN |
| Supply Voltage | 2.7V to 3.6V |
| Operating Current | 0.6mA (typical) |
| Lux Range | 188 µLux to 88,000 Lux |
| Interface | I2C |
| Operating Temperature | -30°C to 80°C |
| Package | FN (6-pin) |
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | VDD | Power supply (2.7V to 3.6V) |
| 2 | GND | Ground |
| 3 | SDA | I2C data line |
| 4 | SCL | I2C clock line |
| 5 | INT | Interrupt output (active low) |
| 6 | ADDR | I2C address select (connect to GND or VDD) |
#include <Wire.h>
// TSL25911FN I2C address
#define TSL25911FN_ADDR 0x29
void setup() {
Serial.begin(9600);
Wire.begin(); // Initialize I2C communication
// Initialize the TSL25911FN sensor
Wire.beginTransmission(TSL25911FN_ADDR);
Wire.write(0x00); // Command register
Wire.write(0x03); // Power on the sensor
Wire.endTransmission();
}
void loop() {
uint16_t ch0, ch1;
// Read channel 0 (visible + IR)
Wire.beginTransmission(TSL25911FN_ADDR);
Wire.write(0x14); // Data register for channel 0
Wire.endTransmission();
Wire.requestFrom(TSL25911FN_ADDR, 2);
ch0 = Wire.read();
ch0 |= (Wire.read() << 8);
// Read channel 1 (IR only)
Wire.beginTransmission(TSL25911FN_ADDR);
Wire.write(0x16); // Data register for channel 1
Wire.endTransmission();
Wire.requestFrom(TSL25911FN_ADDR, 2);
ch1 = Wire.read();
ch1 |= (Wire.read() << 8);
// Calculate lux (simplified formula)
float lux = (ch0 - ch1) * (1.0 / 0.39);
Serial.print("Lux: ");
Serial.println(lux);
delay(1000); // Wait for 1 second before next reading
}
By following this documentation, users can effectively integrate and utilize the CQRobot TSL25911FN Ambient Light Sensor in their projects, ensuring accurate and reliable light measurements.