Circuit Documentation

Summary

This circuit integrates various components controlled by an Arduino UNO microcontroller to perform a range of functions. The circuit includes an OLED display for visual output, an RFID-RC522 module for RFID reading, a Module LDR for light detection, a stepper motor driven by a ULN2003A breakout board for motion control, LEDs for visual indication, and a Bluetooth HC-06 module for wireless communication. The Arduino UNO serves as the central processing unit, interfacing with each module and sensor to create an interactive system.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• It has 14 digital input/output pins, 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header, and a reset button.

0.96" OLED

• A small display that uses the I2C communication protocol.
• It is typically used for displaying data, graphics, and text.

RFID-RC522

• An RFID reader/writer module that operates at 13.56 MHz.
• It is commonly used for contactless communication and identification.

Module LDR

• A light-dependent resistor module.
• It is used to detect the presence and intensity of light.

Adafruit Gear-Reduced Stepper Motor (small)

• A small stepper motor suitable for precise positioning and movement.

ULN2003A breakout board

• A driver board designed to drive stepper motors.
• It contains a ULN2003A transistor array.

LED: Two Pin (red)

• A basic red LED with an anode and cathode for simple indication purposes.

Bluetooth HC-06

• A Bluetooth module that allows for wireless communication with other Bluetooth-enabled devices.

Wiring Details

Arduino UNO

• GND: Connected to the ground pins of the OLED, Bluetooth HC-06, Module LDR, ULN2003A breakout board, and one of the red LEDs.
• 3.3V: Supplies power to the RFID-RC522.
• 5V: Powers the OLED, Module LDR, Bluetooth HC-06, and ULN2003A breakout board.
• A4 (SDA): Connected to the SCK pin of the OLED for I2C communication.
• A5 (SCL): Connected to the SDA pin of the OLED for I2C communication.
• D0-D13: Various digital pins connected to the RFID-RC522, Module LDR, ULN2003A breakout board, Bluetooth HC-06, and LEDs for control signals.

0.96" OLED

• GND: Connected to the ground (common ground with Arduino UNO).
• VDD: Powered by the 5V output from the Arduino UNO.
• SCK: Connected to A4 on the Arduino UNO for I2C communication.
• SDA: Connected to A5 on the Arduino UNO for I2C communication.

RFID-RC522

• VCC (3.3V): Powered by the 3.3V output from the Arduino UNO.
• RST: Connected to D3 on the Arduino UNO for reset control.
• GND: Connected to the ground (common ground with Arduino UNO).
• IRQ: Not connected in this circuit.
• MISO, MOSI, SCK, SDA: Connected to D11, D12, D13, and D10 respectively on the Arduino UNO for SPI communication.

Module LDR

• VCC: Powered by the 5V output from the Arduino UNO.
• GND: Connected to the ground (common ground with Arduino UNO).
• DO: Connected to D9 on the Arduino UNO for digital signal output.
• AO: Not connected in this circuit.

Adafruit Gear-Reduced Stepper Motor (small)

• RED, ORANGE, YELLOW, PINK, BLUE: Connected to the corresponding wires on the ULN2003A breakout board to control the stepper motor phases.

ULN2003A breakout board

• In 1, In 2, In 3, In 4: Connected to D4, D5, D6, and D7 on the Arduino UNO for control signals.
• 0V: Connected to the ground (common ground with Arduino UNO).
• +5V: Powered by the 5V output from the Arduino UNO.
• ON/OFF jumper switch: Not detailed in the connection list.
• BLUE, PINK, YELLOW, ORANGE, RED wire: Connected to the corresponding wires of the stepper motor.

LED: Two Pin (red)

• cathode: Connected to the ground (common ground with Arduino UNO).
• anode: Connected to D8 on the Arduino UNO for control.

Bluetooth HC-06

• VCC: Powered by the 5V output from the Arduino UNO.
• GND: Connected to the ground (common ground with Arduino UNO).
• TXD: Connected to D0 on the Arduino UNO for transmitting data.
• RXD: Connected to D1 on the Arduino UNO for receiving data.

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 specific functionality. It needs to be populated with the setup and loop functions to control the connected components based on the desired application.