Circuit Documentation

Summary

This document provides a detailed overview of a circuit that integrates an Arduino UNO microcontroller with various sensors, actuators, and display components. The circuit includes an RFID reader, an ultrasonic sensor, a micro servo motor, multiple LEDs, a piezo buzzer, resistors, and a 16x2 I2C LCD display. The Arduino UNO serves as the central controller, interfacing with all other components to perform various functions.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

RFID-RC522

• Description: An RFID reader module.
• Pins: VCC (3.3V), RST, GND, IRQ, MISO, MOSI, SCK, SDA

HC-SR04 Ultrasonic Sensor

• Description: An ultrasonic distance sensor.
• Pins: VCC, TRIG, ECHO, GND

Micro Servo 9G

• Description: A small servo motor.
• Pins: GND, +5V, PWM

LED: Two Pin (red)

• Description: A red LED.
• Pins: cathode, anode

LED: Two Pin (green)

• Description: A green LED.
• Pins: cathode, anode

LED: Two Pin (yellow)

• Description: A yellow LED.
• Pins: cathode, anode

Piezo Buzzer

• Description: A piezoelectric buzzer.
• Pins: pin 1, pin 2

Resistor (220 Ohms)

• Description: A resistor with a resistance of 220 Ohms.
• Pins: pin1, pin2

16x2 I2C LCD

• Description: A 16x2 character LCD with I2C interface.
• Pins: GND, VCC, SDA, SCL

Wiring Details

Arduino UNO

• GND: Connected to GND of Piezo Buzzer, 16x2 I2C LCD, HC-SR04 Ultrasonic Sensor, RFID-RC522, and Micro Servo 9G.
• 5V: Connected to VCC of 16x2 I2C LCD, Micro Servo 9G, and HC-SR04 Ultrasonic Sensor.
• 3.3V: Connected to VCC (3.3V) of RFID-RC522.
• D8: Connected to pin 2 of Piezo Buzzer.
• D4: Connected to anode of green LED.
• D2: Connected to anode of yellow LED.
• D5: Connected to anode of red LED.
• A4: Connected to SDA of 16x2 I2C LCD.
• A5: Connected to SCL of 16x2 I2C LCD.
• D13: Connected to SCK of RFID-RC522.
• D12: Connected to MISO of RFID-RC522.
• D11: Connected to MOSI of RFID-RC522.
• D10: Connected to SDA of RFID-RC522.
• D9: Connected to RST of RFID-RC522.
• D7: Connected to TRIG of HC-SR04 Ultrasonic Sensor.
• D6: Connected to ECHO of HC-SR04 Ultrasonic Sensor.
• D3: Connected to PWM of Micro Servo 9G.

RFID-RC522

• VCC (3.3V): Connected to 3.3V of Arduino UNO.
• RST: Connected to D9 of Arduino UNO.
• GND: Connected to GND of Arduino UNO.
• SCK: Connected to D13 of Arduino UNO.
• MISO: Connected to D12 of Arduino UNO.
• MOSI: Connected to D11 of Arduino UNO.
• SDA: Connected to D10 of Arduino UNO.

HC-SR04 Ultrasonic Sensor

• VCC: Connected to 5V of Arduino UNO.
• TRIG: Connected to D7 of Arduino UNO.
• ECHO: Connected to D6 of Arduino UNO.
• GND: Connected to GND of Arduino UNO.

Micro Servo 9G

• GND: Connected to GND of Arduino UNO.
• +5V: Connected to 5V of Arduino UNO.
• PWM: Connected to D3 of Arduino UNO.

LED: Two Pin (red)

• cathode: Connected to pin1 of a 220 Ohm resistor.
• anode: Connected to D5 of Arduino UNO.

LED: Two Pin (green)

• cathode: Connected to pin1 of a 220 Ohm resistor.
• anode: Connected to D4 of Arduino UNO.

LED: Two Pin (yellow)

• cathode: Connected to pin1 of a 220 Ohm resistor.
• anode: Connected to D2 of Arduino UNO.

Piezo Buzzer

• pin 1: Connected to GND of Arduino UNO.
• pin 2: Connected to D8 of Arduino UNO.

Resistor (220 Ohms)

• pin1: Connected to cathode of respective LEDs.
• pin2: Connected to GND of Arduino UNO.

16x2 I2C LCD

• GND: Connected to GND of Arduino UNO.
• VCC: Connected to 5V of Arduino UNO.
• SDA: Connected to A4 of Arduino UNO.
• SCL: Connected to A5 of Arduino UNO.

Documented Code

Arduino UNO Code

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

}

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

}

This code is a basic template for the Arduino UNO. The setup() function is used to initialize any settings or configurations, and the loop() function contains the main code that runs repeatedly.