Light-Intensity-Monitoring-System

Description

A project to measure and display light intensity using a TSL2561 luminosity sensor, Arduino Nano, and Mistura PI-4000 process indicator. This system reads light levels, processes the data, and outputs a corresponding analog signal to a display for real-time monitoring.

Components

1. GY-2561 TSL2561 Luminosity Sensor
2. Arduino Nano
3. Mistura PI-4000 Display
4. 1kΩ Resistor
5. 10µF Capacitor
6. Connecting wires
7. Breadboard (optional for prototyping)

Wiring Diagram

TSL2561 to Arduino Nano

• VCC (sensor) to 3.3V/5V (Nano)
• GND (sensor) to GND (Nano)
• SCL (sensor) to A5 (Nano)
• SDA (sensor) to A4 (Nano)

Low-Pass Filter for PWM to Analog Conversion

• Pin 9 (PWM Output) on the Arduino Nano:
  • Connect to one end of the 1kΩ resistor.
  • The other end of the 1kΩ resistor connects to both the positive lead of the 10µF capacitor and the analog input of the PI-4000.
• Negative lead of the 10µF capacitor:
  • Connect to the GND of the Arduino Nano.
• GND of the Arduino Nano:
  • Also connect to the GND of the PI-4000 to ensure a common ground.

Schematic

Explanation

TSL2561 Sensor to Arduino Nano:

• VCC (sensor) to 3.3V/5V on the Nano
• GND (sensor) to GND on the Nano
• SCL (sensor) to A5 on the Nano
• SDA (sensor) to A4 on the Nano

Low-Pass Filter Setup:

1. Connect Pin 9 on the Arduino Nano (PWM output) to one end of a 1kΩ resistor.
2. Connect the other end of the 1kΩ resistor to:
   • The positive lead of a 10µF capacitor
   • The analog input terminal of the PI-4000
3. Connect the negative lead of the 10µF capacitor to the GND of the Arduino Nano.

Common Ground:

• Connect the GND of the Arduino Nano to the GND of the PI-4000 to ensure a common ground reference.

How It Works

• The TSL2561 sensor measures light intensity and communicates this data to the Arduino Nano via I2C.
• The Arduino Nano processes this data and outputs a corresponding PWM signal from pin 9.
• The low-pass filter (1kΩ resistor and 10µF capacitor) smooths the PWM signal into a steady DC voltage.
• The Mistura PI-4000 reads this DC voltage as an analog input and displays the corresponding light intensity.