Circuit Documentation

Summary

This circuit is designed to control a traffic light and multiple DC motors using an ESP32 microcontroller. The ESP32 is interfaced with an L298N DC motor driver to control the motors and directly drives the LEDs of a traffic light. The circuit also includes multiple MT3608 step-up voltage regulators to boost the voltage from a 4 x AAA battery mount to the required levels for the motor drivers. An MG996R servo motor is also controlled by the ESP32.

Component List

ESP32 (30 pin)

• Microcontroller with WiFi and Bluetooth capabilities.
• 30 GPIO pins including analog inputs, UART, I2C, SPI, VP, VN, and power pins.

MT3608 (x4)

• A step-up voltage regulator that boosts the input voltage to a higher output voltage.
• Each module has input and output voltage pins and ground connections.

L298N DC Motor Driver (x2)

• A dual H-bridge motor driver capable of driving two DC motors or one stepper motor.
• It has pins for motor outputs, power supply, logic inputs, and enable pins for speed control.

MG996R

• A high-torque digital servo motor.
• It has a signal line, Vcc, and ground connections.

4 x AAA Battery Mount

• A battery holder for four AAA batteries, providing a power source for the circuit.
• It has positive and negative terminals.

DC Motor (x3)

• Standard DC motors with two connection pins.

Traffic Light

• A simple traffic light module with LEDs for green, yellow, and red, and a ground connection.

Wiring Details

ESP32 (30 pin)

• D32 connected to L298N DC motor driver (5V)
• D25 connected to Traffic Light (Green)
• D26 connected to Traffic Light (Yellow)
• D27 connected to Traffic Light (Red)
• D14 connected to L298N DC motor driver (IN1)
• D23 connected to L298N DC motor driver (ENA)
• D22 connected to L298N DC motor driver (IN2)
• D21 connected to L298N DC motor driver (ENB)
• D19 connected to L298N DC motor driver (IN4)
• D18 connected to MG996R (Signal Line)
• D5 connected to L298N DC motor driver (IN3)
• D4 connected to L298N DC motor driver (ENB)
• D2 connected to L298N DC motor driver (IN4)
• D15 connected to L298N DC motor driver (IN3)
• GND connected to Traffic Light (GND), MT3608 (VOUT-), and L298N DC motor driver (GND)

MT3608 (x4)

• VOUT+ connected to L298N DC motor driver (12V)
• VIN+ connected to 4 x AAA Battery Mount (+)
• VOUT- connected to ESP32 (GND), L298N DC motor driver (GND)
• VIN- connected to 4 x AAA Battery Mount (-)

L298N DC Motor Driver (x2)

• OUT1, OUT2, OUT3, OUT4 connected to DC Motors
• 12V connected to MT3608 (VOUT+)
• GND connected to ESP32 (GND), MT3608 (VOUT-)
• 5V connected to ESP32 (D32), MG996R (Vcc)
• ENA, ENB connected to ESP32 (D23, D21)
• IN1, IN2, IN3, IN4 connected to ESP32 (D14, D22, D5, D2, D15, D19)

MG996R

• Signal Line connected to ESP32 (D18)
• Vcc connected to L298N DC motor driver (5V)
• GND connected to ESP32 (GND)

4 x AAA Battery Mount

• + connected to MT3608 (VIN+)
• - connected to MT3608 (VIN-)

DC Motor (x3)

• pin 1, pin 2 connected to L298N DC motor driver (OUT1, OUT2, OUT3, OUT4)

Traffic Light

• Green connected to ESP32 (D25)
• Yellow connected to ESP32 (D26)
• Red connected to ESP32 (D27)
• GND connected to ESP32 (GND)

Documented Code

No code was provided for the microcontroller. The documentation of the code would typically include a description of the functionality, setup, and loop sections, as well as any functions or libraries used. Since no code is available, this section cannot be completed. If code becomes available, it should be documented here with explanations of how it interacts with the hardware components listed above.