Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with various components including LEDs, a buzzer, and an RFID-RC522 module. The circuit is designed to demonstrate basic input/output operations and communication with an RFID module.

Component List

1. LED: Two Pin (red)

   • Pins: cathode, anode
   • Description: A red LED used for visual indication.
   • Purpose in Circuit: Provides visual feedback.

2. LED: Two Pin (green)

   • Pins: cathode, anode
   • Description: A green LED used for visual indication.
   • Purpose in Circuit: Provides visual feedback.

3. Arduino UNO

   • 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
   • Description: A microcontroller board based on the ATmega328P.
   • Purpose in Circuit: Acts as the main controller for the circuit.

4. Buzzer

   • Pins: GND, IN
   • Description: An electronic device that emits sound.
   • Purpose in Circuit: Provides audible feedback.

5. RFID-RC522

   • Pins: VCC (3.3V), RST, GND, IRQ, MISO, MOSI, SCK, SDA
   • Description: An RFID module used for reading RFID tags.
   • Purpose in Circuit: Reads RFID tags and communicates with the Arduino.

6. Resistor (200 Ohms)

   • Pins: pin1, pin2
   • Description: A resistor with a resistance of 200 Ohms.
   • Purpose in Circuit: Limits current to the LEDs.

Wiring Details

LED: Two Pin (red)

• cathode connected to:
  • GND of Arduino UNO
  • GND of Buzzer
  • cathode of LED: Two Pin (green)
• anode connected to:
  • pin2 of Resistor (200 Ohms)

LED: Two Pin (green)

• cathode connected to:
  • GND of Arduino UNO
  • GND of Buzzer
  • cathode of LED: Two Pin (red)
• anode connected to:
  • pin2 of Resistor (200 Ohms)

Arduino UNO

• GND connected to:
  • cathode of LED: Two Pin (red)
  • cathode of LED: Two Pin (green)
  • GND of Buzzer
  • GND of RFID-RC522
• D1 connected to:
  • pin1 of Resistor (200 Ohms)
  • IN of Buzzer
• D2 connected to:
  • pin1 of Resistor (200 Ohms)
• 5V connected to:
  • VCC (3.3V) of RFID-RC522
• 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

Buzzer

• GND connected to:
  • GND of Arduino UNO
  • cathode of LED: Two Pin (red)
  • cathode of LED: Two Pin (green)
• IN connected to:
  • pin1 of Resistor (200 Ohms)
  • D1 of Arduino UNO

RFID-RC522

• VCC (3.3V) connected to:
  • 5V 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
• RST connected to:
  • D9 of Arduino UNO

Resistor (200 Ohms)

• pin1 connected to:
  • D1 of Arduino UNO
  • IN of Buzzer
• pin2 connected to:
  • anode of LED: Two Pin (red)

Resistor (200 Ohms)

• pin1 connected to:
  • D2 of Arduino UNO
• pin2 connected to:
  • anode of LED: Two Pin (green)

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, and the loop() function contains the main code that runs repeatedly.