Circuit Documentation

Summary

This circuit integrates an Arduino UNO microcontroller with a 28BYJ-48 Stepper Motor, a ULN2003 driver module, and two PIR sensors. The Arduino UNO is responsible for controlling the stepper motor via the ULN2003 driver and for processing signals from the PIR sensors. The stepper motor is used for precise motion control, and the PIR sensors are used to detect motion in the environment. The ULN2003 driver module interfaces between the Arduino and the stepper motor, providing the necessary current and voltage levels. The circuit is powered by the 5V output from the Arduino UNO, which also provides ground connections to the other components.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• Provides digital I/O pins, analog input pins, and various power outputs
• Used as the central controller for the circuit

28BYJ-48 Stepper Motor

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

ULN2003 Driver Module

• A 7-channel Darlington array that can drive high current loads
• Interfaces between the Arduino and the stepper motor

PIR Sensor

• Passive Infrared sensor used to detect motion
• Two instances of this sensor are used in the circuit for motion detection

Wiring Details

Arduino UNO

• 5V pin provides power to the ULN2003 driver module and both PIR sensors
• GND pin is connected to the ground of the ULN2003 driver module and both PIR sensors
• Digital pins D8, D9, D10, and D11 are connected to the IN1, IN2, IN3, and IN4 inputs of the ULN2003, respectively
• Digital pins D2 and D3 are connected to the SIG outputs of the PIR sensors

28BYJ-48 Stepper Motor

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

ULN2003 Driver Module

• + pin is connected to the 5V output of the Arduino UNO
• GND pin is connected to the GND pin of the Arduino UNO
• IN1, IN2, IN3, and IN4 inputs are connected to the D8, D9, D10, and D11 pins of the Arduino UNO, respectively
• COIL1, COIL2, COIL3, COIL4, and COIL5 outputs are connected to the corresponding wires of the 28BYJ-48 Stepper Motor

PIR Sensors

• VDD pins are connected to the 5V output of the Arduino UNO
• GND pins are connected to the GND pin of the Arduino UNO
• SIG outputs are connected to the D2 and D3 pins of the Arduino UNO

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:

}

The provided code is a template and does not contain any functional code for controlling the stepper motor or reading the PIR sensors. The user is expected to fill in the setup() and loop() functions with the necessary initialization and control logic for the components in the circuit.