Circuit Documentation

Summary

This circuit integrates various components controlled by an Arduino UNO microcontroller to perform a range of functions. The system includes an RFID-RC522 module for RFID reading, an LCD Display for user interface, a Servomotor SG90 for actuation, a buzzer for audio feedback, and a Membrane Matrix Keypad for user input. The circuit is designed to be powered by the Arduino UNO, which also provides the necessary control signals to each component.

Component List

RFID-RC522

• Description: An RFID reader/writer module for contactless communication at 13.56MHz.
• Pins: VCC (3.3V), RST, GND, IRQ, MISO, MOSI, SCK, SDA

Arduino UNO

• Description: A microcontroller board based on the ATmega328P, widely used for building digital devices and interactive objects.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0-A5, SCL, SDA, AREF, D0-D13

LCD Display 16x4 I2C

• Description: A 16x4 character LCD display with an I2C interface for displaying text and numbers.
• Pins: SCL, SDA, VCC, GND

Servomotor SG90

• Description: A small and lightweight servo motor capable of precise control.
• Pins: SIG, VCC, GND

Buzzer

• Description: An electronic buzzer for producing simple tones and sounds.
• Pins: PIN, GND

Membrane Matrix Keypad

• Description: A simple interface for user input using buttons arranged in rows and columns.
• Pins: Row 1-4, Column 1-3

Wiring Details

RFID-RC522

• VCC (3.3V) connected to Arduino UNO Vin
• RST connected to Arduino UNO D9
• GND connected to Arduino UNO GND
• MISO connected to Arduino UNO D12
• MOSI connected to Arduino UNO D11
• SCK connected to Arduino UNO D13
• SDA connected to Arduino UNO D10

Arduino UNO

• 5V and GND pins provide power to the LCD Display and Servomotor
• Vin provides 3.3V to the RFID-RC522
• Digital and analog pins are used for control signals and communication with other components

LCD Display 16x4 I2C

• SCL connected to Arduino UNO SCL
• SDA connected to Arduino UNO SDA
• VCC connected to Arduino UNO 5V
• GND connected to Arduino UNO GND

Servomotor SG90

• SIG connected to Arduino UNO D4
• VCC connected to Arduino UNO 5V
• GND connected to Arduino UNO GND

Buzzer

• PIN connected to Arduino UNO D8
• GND connected to Arduino UNO GND

Membrane Matrix Keypad

• Column 1 connected to Arduino UNO D7
• Column 2 connected to Arduino UNO A0
• Column 3 connected to Arduino UNO A1
• Row 1 connected to Arduino UNO D2
• Row 2 connected to Arduino UNO D3
• Row 3 connected to Arduino UNO D5
• Row 4 connected to Arduino UNO D6

Documented Code

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

}

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

}

Filename: sketch.ino

Note: The provided code is a template and does not include specific functionality. It should be populated with the setup and loop functions required to control the components in the circuit.