Circuit Documentation

Summary

This circuit incorporates an Arduino UNO as the central microcontroller, interfaced with an I2C LCD 16x2 Screen for display purposes. The circuit also includes photodiodes for light detection, LEDs for indication, resistors for current limiting and voltage division, an LM358 operational amplifier for signal amplification, and electrolytic capacitors for filtering or timing purposes.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• Provides digital and analog I/O pins
• Powers the I2C LCD screen and provides communication via I2C

I2C LCD 16x2 Screen

• A liquid crystal display capable of displaying 16 characters per line across 2 lines
• Uses I2C communication protocol for interfacing with the Arduino UNO

Photodiodes

• Light-sensitive components that generate a current proportional to the light intensity
• Used for detecting light levels in the circuit

LEDs (White)

• Light Emitting Diodes used as visual indicators
• Requires current-limiting resistors to prevent damage

Resistors

• Passive components used for current limiting and voltage division
• Values range from 10 Ohms to 200 Ohms in this circuit

LM358

• A dual operational amplifier used for signal amplification and conditioning

Electrolytic Capacitors

• Polarized capacitors with a capacitance of 1 Farad
• Used for filtering or timing applications within the circuit

Wiring Details

Arduino UNO

• 5V pin connected to the VCC (5V) pin of the I2C LCD Screen
• GND pin connected to the GND pin of the I2C LCD Screen, cathodes of LEDs, and cathodes of Photodiodes
• A0 and A1 pins connected to the - pins of Electrolytic Capacitors
• A4 (SDA) and A5 (SCL) pins connected to the corresponding SDA and SCL pins of the I2C LCD Screen
• D3 and D4 pins connected to the pin2 of respective 200 Ohm Resistors

I2C LCD 16x2 Screen

• VCC (5V) and GND pins connected to the corresponding power supply pins on the Arduino UNO
• SDA and SCL pins connected to the I2C data and clock lines on the Arduino UNO

Photodiodes

• Anode pins connected to the input pins of the LM358
• Cathode pins connected to the ground through 10 Ohm Resistors

LEDs (White)

• Anode pins connected to the pin1 of respective 200 Ohm Resistors
• Cathode pins connected to the ground

Resistors

• 200 Ohm Resistors connected between the D3 and D4 pins of the Arduino UNO and the anodes of the LEDs
• 10 Ohm Resistors connected between the cathodes of the Photodiodes and the ground

LM358

• INPUT- and INPUT 2- pins connected to the cathodes of LEDs and Photodiodes
• INPUT+ and INPUT 2+ pins connected to the anodes of Photodiodes through 10 Ohm Resistors
• OUTPUT 1 and OUTPUT 2 pins connected to the pin1 of 10 Ohm Resistors

Electrolytic Capacitors

• - pins connected to the A0 and A1 pins of the Arduino UNO
• + pins connected to the pin2 of 10 Ohm Resistors

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Notes

• The provided code for the Arduino UNO is a template with empty setup() and loop() functions. Actual implementation code is required for the circuit to perform specific tasks.
• The documentation.txt file is mentioned but contains no code or content as per the provided input.