Circuit Documentation

Summary

This circuit integrates an Arduino UNO microcontroller with a 28BYJ-48 Stepper Motor, a ULN2003 driver, and two PIR sensors. The Arduino UNO controls the stepper motor via the ULN2003 driver and monitors signals from the PIR sensors to possibly trigger events based on motion detection. The 5V and GND pins from the Arduino provide power to the PIR sensors and the ULN2003 driver. The digital pins of the Arduino are used to send control signals to the ULN2003, which in turn drives the stepper motor. Additionally, two digital pins on the Arduino are used to read the output from the PIR sensors.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• Provides I/O pins and power for the circuit

28BYJ-48 Stepper Motor

• A small, 5-wire, unipolar stepper motor
• Used for precise motion control

ULN2003

• A 7-channel Darlington array IC
• Acts as an interface between the microcontroller and the stepper motor

PIR Sensors (x2)

• Passive Infrared sensors for motion detection
• Each sensor provides a digital signal when motion is detected

Wiring Details

Arduino UNO

• 5V pin provides power to the PIR sensors and the ULN2003 driver
• GND pin is connected to the ground pins of the PIR sensors and the ULN2003 driver
• Digital pins D8, D9, D10, and D11 are connected to the IN1, IN2, IN3, and IN4 pins of the ULN2003 driver to control the stepper motor
• Digital pins D2 and D3 are connected to the SIG pins of the PIR sensors to read motion detection signals

28BYJ-48 Stepper Motor

• BLUE, PINK, YELLOW, ORANGE, and RED wires are connected to the COIL1, COIL2, COIL3, COIL4, and COIL5 pins of the ULN2003 driver

ULN2003

• IN1, IN2, IN3, and IN4 pins are connected to the Arduino digital pins for control signals
• COIL1, COIL2, COIL3, COIL4, and COIL5 pins are connected to the corresponding wires of the stepper motor
• + pin is connected to the 5V pin of the Arduino for power
• GND pin is connected to the GND pin of the Arduino

PIR Sensors

• VDD pins are connected to the 5V pin of the Arduino for power
• GND pins are connected to the GND pin of the Arduino
• SIG pins are connected to the D2 and D3 pins of the Arduino to send the motion detection signal

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 contain any functional code to control the stepper motor or read from the PIR sensors. This will need to be implemented based on the specific requirements of the circuit's application.