Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to control two DC motors using an ESP32 microcontroller, an L298N motor driver, and an HC-SR04 ultrasonic sensor. The circuit is powered by a 5V battery and a 2200mAh LiPo battery. The ESP32 microcontroller is programmed to control the motor driver and read data from the ultrasonic sensor.

Component List

1. L298N DC Motor Driver

   • Description: A dual H-Bridge motor driver that allows control of the speed and direction of two DC motors.
   • 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

2. DC Motor (Motor 1)

   • Description: A standard DC motor.
   • Pins: pin 1, pin 2

3. DC Motor (Motor 2)

   • Description: A standard DC motor.
   • Pins: pin 1, pin 2

4. LiPo Battery 2200mAh 30C

   • Description: A high-capacity LiPo battery used to power the motor driver.
   • Pins: VCC, GND

5. ESP32 (30 pin)

   • Description: A powerful microcontroller with built-in Wi-Fi and Bluetooth capabilities.
   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3

6. HC-SR04 Ultrasonic Sensor

   • Description: A sensor used to measure distance by using ultrasonic waves.
   • Pins: VCC, TRIG, ECHO, GND

7. 5V Battery

   • Description: A 5V battery used to power the ESP32 and the ultrasonic sensor.
   • Pins: +, -

Wiring Details

L298N DC Motor Driver

• ENA connected to D23 of ESP32
• ENB connected to D22 of ESP32
• IN1 connected to D19 of ESP32
• IN2 connected to D18 of ESP32
• IN3 connected to D2 of ESP32
• IN4 connected to D5 of ESP32
• 5V connected to + of 5V Battery
• GND connected to GND of LiPo Battery
• 12V connected to VCC of LiPo Battery
• OUT1 connected to pin 2 of DC Motor (Motor 2)
• OUT2 connected to pin 1 of DC Motor (Motor 2)
• OUT3 connected to pin 2 of DC Motor (Motor 1)
• OUT4 connected to pin 1 of DC Motor (Motor 1)

DC Motor (Motor 1)

• pin 1 connected to OUT4 of L298N DC Motor Driver
• pin 2 connected to OUT3 of L298N DC Motor Driver

DC Motor (Motor 2)

• pin 1 connected to OUT2 of L298N DC Motor Driver
• pin 2 connected to OUT1 of L298N DC Motor Driver

LiPo Battery 2200mAh 30C

• VCC connected to 12V of L298N DC Motor Driver
• GND connected to GND of L298N DC Motor Driver

ESP32 (30 pin)

• D33 connected to ECHO of HC-SR04 Ultrasonic Sensor
• D27 connected to TRIG of HC-SR04 Ultrasonic Sensor
• GND connected to - of 5V Battery
• D23 connected to ENA of L298N DC Motor Driver
• D22 connected to ENB of L298N DC Motor Driver
• D19 connected to IN1 of L298N DC Motor Driver
• D18 connected to IN2 of L298N DC Motor Driver
• D5 connected to IN4 of L298N DC Motor Driver
• D2 connected to IN3 of L298N DC Motor Driver
• 3V3 connected to + of 5V Battery

HC-SR04 Ultrasonic Sensor

• ECHO connected to D33 of ESP32
• TRIG connected to D27 of ESP32
• GND connected to GND of 5V Battery
• VCC connected to + of 5V Battery

5V Battery

• + connected to 3V3 of ESP32
• - connected to GND of ESP32

Documented Code

sketch.ino

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

documentation.txt