Circuit Documentation

Summary of the Circuit

This circuit is designed around an Arduino UNO microcontroller, which serves as the central processing unit for controlling various peripherals including servomotors, LEDs, a buzzer, an HC-SR04 ultrasonic sensor, and an RFID-RC522 module. The circuit appears to be a multifunctional system capable of interacting with the environment through the ultrasonic sensor, providing visual indicators via LEDs, moving parts with servomotors, reading RFID tags, and giving audio feedback with a buzzer.

Component List

Servomotor SG90

• Description: A small and lightweight servo used for precise control of motion.
• Pins: SIG (Signal), VCC (Power), GND (Ground)

LED: Two Pin (green)

• Description: A green light-emitting diode used as an indicator light.
• Pins: cathode (Negative), anode (Positive)

LED: Two Pin (red)

• Description: A red light-emitting diode used as an indicator light.
• Pins: cathode (Negative), anode (Positive)

HC-SR04 Ultrasonic Sensor

• Description: A sensor that measures distance by emitting ultrasonic waves and measuring the time taken for the echo to return.
• Pins: VCC (Power), TRIG (Trigger), ECHO (Echo), GND (Ground)

RFID-RC522

• Description: An RFID reader/writer module for contactless communication using radio frequency.
• Pins: SDA (Serial Data), SCK (Serial Clock), MOSI (Master Out Slave In), MISO (Master In Slave Out), IRQ (Interrupt Request), GND (Ground), RST (Reset), 3.3V (Power)

Arduino UNO

• Description: A microcontroller board based on the ATmega328P, widely used for building digital devices and interactive objects.
• Pins: Various digital and analog I/O pins, power supply pins, and communication interfaces.

Buzzer

• Description: An audio signaling device that can be used to create beeps or alerts.
• Pins: PIN (Signal), GND (Ground)

Wiring Details

Servomotor SG90

• Signal: Connected to Arduino UNO digital pins (D5, D6)
• Power (VCC): Connected to Arduino UNO 5V
• Ground (GND): Connected to Arduino UNO GND

LED: Two Pin (green and red)

• Cathode (Negative): Connected to Arduino UNO GND
• Anode (Positive): Requires connection to Arduino UNO digital pins through current-limiting resistors (not specified in the net list)

HC-SR04 Ultrasonic Sensor

• VCC: Connected to Arduino UNO 5V
• TRIG: Connected to Arduino UNO digital pin D8
• ECHO: Connected to Arduino UNO digital pin D7
• GND: Connected to Arduino UNO GND

RFID-RC522

• SDA: Connected to Arduino UNO digital pin D10
• SCK: Connected to Arduino UNO digital pin D13
• MOSI: Connected to Arduino UNO digital pin D11
• MISO: Connected to Arduino UNO digital pin D12
• IRQ: Not connected
• GND: Connected to Arduino UNO GND
• RST: Connected to Arduino UNO digital pin D9
• 3.3V: Connected to Arduino UNO 3.3V

Buzzer

• Signal (PIN): Connected to Arduino UNO analog pin A2
• Ground (GND): Connected to Arduino UNO GND

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:

}

Note: The provided code is a template and does not include any functionality. It needs to be populated with the logic to control the connected components based on the requirements of the circuit's application.

Additional Files

• documentation.txt: This file is mentioned but no content is provided. It is likely intended for additional notes or manual documentation.