Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with various components including an ultrasonic sensor, a micro servo, multiple LEDs, a piezo buzzer, an I2C LCD, and an RFID module. The circuit is designed to demonstrate basic sensor integration, actuator control, and visual feedback using LEDs and an LCD display.

Component List

1. 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

2. HC-SR04 Ultrasonic Sensor

   • Description: A sensor used for measuring distance.
   • Pins: VCC, TRIG, ECHO, GND

3. Micro servo 9G

   • Description: A small servo motor used for precise control of angular position.
   • Pins: GND, +5V, PWM

4. LED: Two Pin (red)

   • Description: A red LED for visual indication.
   • Pins: cathode, anode

5. LED: Two Pin (green)

   • Description: A green LED for visual indication.
   • Pins: cathode, anode

6. LED: Two Pin (yellow)

   • Description: A yellow LED for visual indication.
   • Pins: cathode, anode

7. Resistor (220 Ohms)

   • Description: A resistor used to limit current.
   • Pins: pin1, pin2

8. 16x2 I2C LCD

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

9. Piezo Buzzer

   • Description: A buzzer used for sound output.
   • Pins: pin 1, pin 2

10. RFID-RC522

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

Wiring Details

Arduino UNO

• GND is connected to:

  • GND of Piezo Buzzer
  • GND of 16x2 I2C LCD
  • GND of HC-SR04 Ultrasonic Sensor
  • GND of Micro servo 9G
  • GND of RFID-RC522

• 5V is connected to:

  • VCC of 16x2 I2C LCD
  • +5V of Micro servo 9G
  • VCC of HC-SR04 Ultrasonic Sensor

• 3.3V is connected to:

  • VCC (3.3V) of RFID-RC522

• D8 is connected to:

  • pin 2 of Piezo Buzzer

• D4 is connected to:

  • anode of LED (green)

• D2 is connected to:

  • anode of LED (yellow)

• D5 is connected to:

  • anode of LED (red)

• A4 is connected to:

  • SDA of 16x2 I2C LCD

• A5 is connected to:

  • SCL of 16x2 I2C LCD

• D13 is connected to:

  • SCK of RFID-RC522

• D12 is connected to:

  • MISO of RFID-RC522

• D11 is connected to:

  • MOSI of RFID-RC522

• D10 is connected to:

  • SDA of RFID-RC522

• D9 is connected to:

  • RST of RFID-RC522

• D7 is connected to:

  • TRIG of HC-SR04 Ultrasonic Sensor

• D6 is connected to:

  • ECHO of HC-SR04 Ultrasonic Sensor

• D3 is connected to:

  • PWM of Micro servo 9G

HC-SR04 Ultrasonic Sensor

• GND is connected to:

  • GND of Arduino UNO

• VCC is connected to:

  • 5V of Arduino UNO

• TRIG is connected to:

  • D7 of Arduino UNO

• ECHO is connected to:

  • D6 of Arduino UNO

Micro servo 9G

• GND is connected to:

  • GND of Arduino UNO

• +5V is connected to:

  • 5V of Arduino UNO

• PWM is connected to:

  • D3 of Arduino UNO

LED: Two Pin (red)

• cathode is connected to:

  • pin1 of Resistor (220 Ohms)

• anode is connected to:

  • D5 of Arduino UNO

LED: Two Pin (green)

• cathode is connected to:

  • pin1 of Resistor (220 Ohms)

• anode is connected to:

  • D4 of Arduino UNO

LED: Two Pin (yellow)

• cathode is connected to:

  • pin1 of Resistor (220 Ohms)

• anode is connected to:

  • D2 of Arduino UNO

Resistor (220 Ohms)

• pin1 is connected to:

  • cathode of LED (red)
  • cathode of LED (green)
  • cathode of LED (yellow)

• pin2 is connected to:

  • pin 1 of Piezo Buzzer
  • GND of Arduino UNO

16x2 I2C LCD

• GND is connected to:

  • GND of Arduino UNO

• VCC is connected to:

  • 5V of Arduino UNO

• SDA is connected to:

  • A4 of Arduino UNO

• SCL is connected to:

  • A5 of Arduino UNO

Piezo Buzzer

• pin 1 is connected to:

  • pin2 of Resistor (220 Ohms)

• pin 2 is connected to:

  • D8 of Arduino UNO

RFID-RC522

• VCC (3.3V) is connected to:

  • 3.3V of Arduino UNO

• GND is connected to:

  • GND of Arduino UNO

• SCK is connected to:

  • D13 of Arduino UNO

• MISO is connected to:

  • D12 of Arduino UNO

• MOSI is connected to:

  • D11 of Arduino UNO

• SDA is connected to:

  • D10 of Arduino UNO

• RST is connected to:

  • D9 of Arduino UNO

Code Documentation

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 where you initialize your components and set up your initial conditions. The loop() function is where you place the main logic of your program that runs repeatedly.