Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller, two L298N DC motor drivers, multiple HC-05 Bluetooth modules, a 9V battery, and several hobby motors. The Arduino UNO controls the motor drivers, which in turn drive the motors. The Bluetooth modules provide wireless communication capabilities. The circuit is powered by a 9V battery.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

L298N DC Motor Driver (2 units)

• Description: A dual H-Bridge motor driver module.
• Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB

HC-05 Bluetooth Module (2 units)

• Description: A Bluetooth module for wireless communication.
• Pins: Key, VCC, GND, TXD, RXD, State

9V Battery

• Description: A standard 9V battery for power supply.
• Pins: +, -

Motor Amarillo Motorreductor Hobby (4 units)

• Description: A small hobby motor with a gearbox.
• Pins: vcc, GND

USB Serial TTL

• Description: A USB to TTL serial converter.
• Pins: GND, 5V, TX, RX, DTR, 3.3V

Wiring Details

Arduino UNO

• 5V connected to 5V of L298N DC motor driver and VCC of HC-05 Bluetooth Module.
• GND connected to - of 9V battery, GND of L298N DC motor driver, and GND of HC-05 Bluetooth Module.
• D11 connected to IN4 of L298N DC motor driver.
• D10 connected to IN3 of L298N DC motor driver.
• D9 connected to IN2 of L298N DC motor driver.
• D8 connected to IN1 of L298N DC motor driver.
• D7 connected to IN4 of the second L298N DC motor driver.
• D6 connected to IN3 of the second L298N DC motor driver.
• D5 connected to IN2 of the second L298N DC motor driver.
• D4 connected to IN1 of the second L298N DC motor driver.
• D1 connected to RXD of HC-05 Bluetooth Module.
• D0 connected to TXD of HC-05 Bluetooth Module.

L298N DC Motor Driver (First Unit)

• 5V connected to 5V of Arduino UNO.
• GND connected to GND of Arduino UNO and - of 9V battery.
• IN4 connected to D11 of Arduino UNO.
• IN3 connected to D10 of Arduino UNO.
• IN2 connected to D9 of Arduino UNO.
• IN1 connected to D8 of Arduino UNO.
• OUT1 connected to GND of Motor Amarillo Motorreductor Hobby.
• OUT2 connected to vcc of Motor Amarillo Motorreductor Hobby.
• OUT3 connected to GND of another Motor Amarillo Motorreductor Hobby.
• OUT4 connected to vcc of another Motor Amarillo Motorreductor Hobby.
• ENA connected to +5V-J1.
• ENB connected to +5V-J2.

L298N DC Motor Driver (Second Unit)

• GND connected to GND of Arduino UNO and - of 9V battery.
• IN4 connected to D7 of Arduino UNO.
• IN3 connected to D6 of Arduino UNO.
• IN2 connected to D5 of Arduino UNO.
• IN1 connected to D4 of Arduino UNO.
• OUT1 connected to GND of Motor Amarillo Motorreductor Hobby.
• OUT2 connected to vcc of Motor Amarillo Motorreductor Hobby.
• OUT3 connected to GND of another Motor Amarillo Motorreductor Hobby.
• OUT4 connected to vcc of another Motor Amarillo Motorreductor Hobby.
• 12V connected to + of 9V battery.
• ENA connected to +5V-J1.
• ENB connected to +5V-J2.

HC-05 Bluetooth Module (First Unit)

• VCC connected to 5V of Arduino UNO.
• GND connected to GND of Arduino UNO.
• RXD connected to D1 of Arduino UNO.
• TXD connected to D0 of Arduino UNO.

HC-05 Bluetooth Module (Second Unit)

• VCC connected to 5V of USB Serial TTL.
• GND connected to GND of USB Serial TTL.
• TXD connected to RX of USB Serial TTL.
• RXD connected to TX of USB Serial TTL.

9V Battery

• - connected to GND of Arduino UNO and GND of L298N DC motor drivers.
• + connected to 12V of the second L298N DC motor driver.

Motor Amarillo Motorreductor Hobby

• GND connected to OUT1 of L298N DC motor driver.
• vcc connected to OUT2 of L298N DC motor driver.
• GND connected to OUT3 of L298N DC motor driver.
• vcc connected to OUT4 of L298N DC motor driver.
• GND connected to OUT1 of the second L298N DC motor driver.
• vcc connected to OUT2 of the second L298N DC motor driver.
• GND connected to OUT3 of the second L298N DC motor driver.
• vcc connected to OUT4 of the second L298N DC motor driver.

USB Serial TTL

• 5V connected to VCC of HC-05 Bluetooth Module.
• GND connected to GND of HC-05 Bluetooth Module.
• RX connected to TXD of HC-05 Bluetooth Module.
• TX connected to RXD of HC-05 Bluetooth Module.

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:

}

Additional Documentation (documentation.txt)