Circuit Documentation

Summary

This circuit integrates an Arduino UNO microcontroller with a Bluetooth module (HM-10), a 16x2 I2C LCD display, two hobby gearmotors with a 48:1 gearbox, a 9V battery, a rocker switch, and an L298N DC motor driver. The Arduino UNO serves as the central processing unit, interfacing with the Bluetooth module for wireless communication, controlling the LCD for display purposes, and managing the motor driver to operate the gearmotors. The circuit is powered by a 9V battery, with a rocker switch included for power control.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• Provides I/O pins for interfacing with other components

Bluetooth module HM-10

• Bluetooth 4.0 module for wireless communication

16x2 I2C LCD

• Liquid Crystal Display with I2C communication interface
• Displays text information

Hobby Gearmotor with 48:1 gearbox (x2)

• DC motors with a 48:1 reduction gearbox for torque

9V Battery (x2)

• Provides power to the circuit

Rocker Switch

• Controls the power supply to the motor driver

L298N DC motor driver

• Dual H-bridge motor driver for controlling the direction and speed of DC motors

Wiring Details

Arduino UNO

• 5V connected to Bluetooth module HM-10 VCC and 16x2 I2C LCD VCC
• GND connected to Bluetooth module HM-10 GND, 16x2 I2C LCD GND, and L298N DC motor driver GND
• Vin connected to L298N DC motor driver 5V
• A4 (SDA) connected to 16x2 I2C LCD SDA
• A5 (SCL) connected to 16x2 I2C LCD SCL
• D10 connected to L298N DC motor driver IN4
• D9 connected to L298N DC motor driver IN3
• D6 connected to L298N DC motor driver IN2
• D5 connected to L298N DC motor driver IN1
• D1 (TX) connected to Bluetooth module HM-10 RX
• D0 (RX) connected to Bluetooth module HM-10 TX

Bluetooth module HM-10

• VCC connected to Arduino UNO 5V
• GND connected to Arduino UNO GND
• RX connected to Arduino UNO D1 (TX)
• TX connected to Arduino UNO D0 (RX)

16x2 I2C LCD

• VCC connected to Arduino UNO 5V
• GND connected to Arduino UNO GND
• SDA connected to Arduino UNO A4 (SDA)
• SCL connected to Arduino UNO A5 (SCL)

Hobby Gearmotor with 48:1 gearbox

• pin 1 of one motor connected to L298N DC motor driver OUT4
• pin 2 of the same motor connected to L298N DC motor driver OUT3
• pin 1 of the other motor connected to L298N DC motor driver OUT2
• pin 2 of the other motor connected to L298N DC motor driver OUT1

9V Battery

• One battery - connected to the other battery +
• The - of the second battery connected to L298N DC motor driver GND
• The + of the first battery connected to rocker switch input

Rocker Switch

• input connected to the + of the first 9V battery
• output connected to L298N DC motor driver 12V

L298N DC motor driver

• GND connected to Arduino UNO GND and the - of the second 9V battery
• 5V connected to Arduino UNO Vin
• 12V connected to rocker switch output
• IN1 connected to Arduino UNO D5
• IN2 connected to Arduino UNO D6
• IN3 connected to Arduino UNO D9
• IN4 connected to Arduino UNO D10
• OUT1 connected to one gearmotor pin 2
• OUT2 connected to one gearmotor pin 1
• OUT3 connected to the other gearmotor pin 2
• OUT4 connected to the other gearmotor pin 1

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:

}

This code is a template for the Arduino UNO and does not contain any specific functionality. It provides the basic structure for an Arduino sketch with setup() and loop() functions. The setup() function is intended for initialization code that runs once, while the loop() function contains code that runs repeatedly, forming the main logic of the program.