Circuit Documentation

Summary

This circuit is designed to control a bipolar stepper motor using an Arduino 101 microcontroller and an L298N Motor Driver Controller Board Module. The circuit also includes a 12V battery to power the motor driver and the stepper motor, as well as two sensors: a Module LDR (Light Dependent Resistor) and a RAIN SENSOR, both interfaced with the Arduino for environmental input.

Component List

Arduino 101

• Microcontroller board based on the Intel Curie Module
• Digital I/O Pins: 14 (of which 6 provide PWM output)
• Analog Input Pins: 6
• Operating Voltage: 3.3V
• Input Voltage (recommended): 7-12V
• Input Voltage (limit): 6-20V

Battery 12V

• Power source for the motor driver and stepper motor
• Voltage: 12V

Stepper Motor (Bipolar)

• A bipolar stepper motor with four leads
• Controlled by the L298N motor driver

L298N Motor Driver Controller Board Module

• Dual H-Bridge motor driver for DC or stepper motors
• Operating Voltage: Up to 35V DC
• Output Current: 2A per channel or 4A max

Module LDR

• Light sensor module with both digital and analog outputs
• Operating Voltage: Typically 3.3-5V

RAIN SENSOR

• Environmental sensor for detecting rain
• Operating Voltage: Typically 3.3-5V

Wiring Details

Arduino 101

• GND connected to the ground of the battery and L298N Motor Driver's ground
• 5V connected to VCC of RAIN SENSOR and Module LDR
• A0 connected to AO of Module LDR
• A1 connected to AO of RAIN SENSOR
• D8 connected to Input 1 of L298N Motor Driver
• D9 PWM connected to Input 2 of L298N Motor Driver
• D10 PWM/SS connected to Input 3 of L298N Motor Driver
• D11 PWM/MOSI connected to Input 4 of L298N Motor Driver

Battery 12V

• + connected to the +12v Power of L298N Motor Driver
• - connected to the ground of the Arduino 101 and L298N Motor Driver

Stepper Motor (Bipolar)

• A connected to Output A of L298N Motor Driver
• B connected to Output B of L298N Motor Driver
• C connected to Output A of L298N Motor Driver
• D connected to Output B of L298N Motor Driver

L298N Motor Driver Controller Board Module

• +12v Power connected to the positive terminal of the battery
• Ground connected to the ground of the Arduino 101 and battery
• Output A connected to pins A and C of the Stepper Motor
• Output B connected to pins B and D of the Stepper Motor
• Input 1 connected to D8 of Arduino 101
• Input 2 connected to D9 PWM of Arduino 101
• Input 3 connected to D10 PWM/SS of Arduino 101
• Input 4 connected to D11 PWM/MOSI of Arduino 101

Module LDR

• VCC connected to 5V of Arduino 101
• GND connected to GND of Arduino 101
• AO connected to A0 of Arduino 101

RAIN SENSOR

• VCC connected to 5V of Arduino 101
• GRD connected to GND of Arduino 101
• AO connected to A1 of Arduino 101

Documented Code

#include <Stepper.h>

const int stepsPerPerRevotution = 200;
Stepper myStepper(stepsPerPerRevotution, 8, 9, 10, 11);

void setup() {
  myStepper.setSpeed(60);
  Serial.begin(9600);
}

void loop() {
  Serial.println("clockwise");
  myStepper.step(stepsPerPerRevotution);
  delay(500);

  Serial.println("counterclockwise");
  myStepper.step(-stepsPerPerRevotution);
  delay(500);
}

Code Description

• The code is written for the Arduino 101 microcontroller to control a bipolar stepper motor via the L298N Motor Driver.
• It includes the Stepper library, which is used to interface with stepper motors.
• The stepsPerPerRevotution variable defines the number of steps per revolution for the motor.
• The Stepper object myStepper is initialized with the number of steps and the pins connected to the motor driver inputs.
• In the setup() function, the stepper motor's speed is set, and the serial communication is started.
• The loop() function rotates the motor clockwise and counterclockwise with a delay between each rotation, and it sends messages to the serial monitor indicating the direction of rotation.