Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP32 microcontroller, an L298N DC motor driver, two HC-SR04 ultrasonic sensors, multiple DC motors, a rocker switch, and a 4xAA battery pack. The circuit is designed to control DC motors and read distance measurements from ultrasonic sensors, with the ESP32 serving as the central control unit.

Component List

HC-SR04 Ultrasonic Sensor

• Description: Ultrasonic distance sensor
• Pins: VCC, TRIG, ECHO, GND

L298N DC Motor Driver

• Description: Dual H-Bridge motor driver
• 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

ESP32

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

DC Motor

• Description: Standard DC motor
• Pins: positive, negative

Rocker Switch

• Description: On/Off switch
• Pins: 1, 2

4xAA Battery Pack

• Description: Battery pack with JST connector
• Pins: POS, NEG

Wiring Details

HC-SR04 Ultrasonic Sensor (1)

• VCC: Connected to 5V of L298N DC motor driver
• TRIG: Connected to D5 of ESP32
• ECHO: Connected to D18 of ESP32
• GND: Connected to GND of L298N DC motor driver, GND of ESP32, and GND of Rocker Switch

HC-SR04 Ultrasonic Sensor (2)

• VCC: Connected to 5V of L298N DC motor driver
• TRIG: Connected to RX2 of ESP32
• ECHO: Connected to TX2 of ESP32
• GND: Connected to GND of L298N DC motor driver, GND of ESP32, and GND of Rocker Switch

L298N DC Motor Driver

• IN1: Connected to D25 of ESP32
• IN2: Connected to D26 of ESP32
• ENA: Connected to D14 of ESP32
• GND: Connected to GND of HC-SR04 Ultrasonic Sensor (1), GND of ESP32, and GND of Rocker Switch
• 5V: Connected to VCC of HC-SR04 Ultrasonic Sensor (1), VIN of ESP32, and VCC of HC-SR04 Ultrasonic Sensor (2)
• ENB: Connected to D15 of ESP32
• IN4: Connected to D19 of ESP32
• IN3: Connected to D21 of ESP32
• 12V: Connected to POS of 4xAA Battery Pack
• OUT1: Connected to positive of DC Motor (1)
• OUT2: Connected to negative of DC Motor (1)
• OUT3: Connected to negative of DC Motor (2)
• OUT4: Connected to positive of DC Motor (2)

ESP32

• D25: Connected to IN1 of L298N DC motor driver
• D26: Connected to IN2 of L298N DC motor driver
• D14: Connected to ENA of L298N DC motor driver
• GND: Connected to GND of L298N DC motor driver, GND of HC-SR04 Ultrasonic Sensor (1), and GND of Rocker Switch
• VIN: Connected to 5V of L298N DC motor driver
• D15: Connected to ENB of L298N DC motor driver
• RX2: Connected to TRIG of HC-SR04 Ultrasonic Sensor (2)
• TX2: Connected to ECHO of HC-SR04 Ultrasonic Sensor (2)
• D5: Connected to TRIG of HC-SR04 Ultrasonic Sensor (1)
• D18: Connected to ECHO of HC-SR04 Ultrasonic Sensor (1)
• D19: Connected to IN4 of L298N DC motor driver
• D21: Connected to IN3 of L298N DC motor driver

DC Motor (1)

• positive: Connected to OUT1 of L298N DC motor driver
• negative: Connected to OUT2 of L298N DC motor driver

DC Motor (2)

• positive: Connected to OUT4 of L298N DC motor driver
• negative: Connected to OUT3 of L298N DC motor driver

Rocker Switch

• 1: Connected to GND of L298N DC motor driver, GND of HC-SR04 Ultrasonic Sensor (1), and GND of ESP32
• 2: Connected to NEG of 4xAA Battery Pack

4xAA Battery Pack

• POS: Connected to 12V of L298N DC motor driver
• NEG: Connected to 2 of Rocker Switch

Code

No code provided for this circuit.

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This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and code section. Each component is described, and its connections are detailed to ensure clarity and ease of understanding.