Circuit Documentation

Summary

This document provides a detailed overview of a circuit involving an Arduino Mega 2560, L298N DC motor drivers, hobby motors, a servo, an ultrasonic sensor, an ESP8266 NodeMCU, an MPU-6050, pushbuttons, resistors, and a 9V battery. The circuit is designed to control multiple motors and sensors, with communication facilitated by the Arduino Mega 2560 and ESP8266 NodeMCU.

Component List

Arduino Mega 2560

• Description: A microcontroller board based on the ATmega2560.
• Pins: IOREF, RESET, 3V3, 5V, GND, VIN, A0-A15, D0-D53, AREF, SDA, SCL

L298N DC Motor Driver

• Description: A 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

Motor Amarillo Motorreductor Hobby

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

Servo

• Description: A small servo motor.
• Pins: GND, VCC, PWM

HC-SR04 Ultrasonic Sensor

• Description: An ultrasonic distance sensor.
• Pins: VCC, TRIG, ECHO, GND

ESP8266 NodeMCU

• Description: A low-cost Wi-Fi microchip with full TCP/IP stack and microcontroller capability.
• Pins: D0-D8, RX, TX, A0, RSV, SD3, SD2, SD1, CMD, SD0, CLK, EN, RST, VIN, 3V3, GND

MPU-6050

• Description: A 6-axis motion tracking device.
• Pins: VCC, GND, SCL, SDA, XDA, XCL, AD0, INT

9V Battery

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

2.1mm Barrel Jack with Terminal Block

• Description: A barrel jack for power connections.
• Pins: POS, NEG

Resistor

• Description: A passive electrical component with resistance.
• Pins: pin1, pin2
• Properties: Resistance: 3000 Ohms, 10000 Ohms

Pushbutton

• Description: A simple pushbutton switch.
• Pins: Pin 1 (in), Pin 2 (in), Pin 3 (out), Pin 4 (out)

Wiring Details

Arduino Mega 2560

• VIN: Connected to 12V of both L298N DC motor drivers.
• GND: Connected to GND of both L298N DC motor drivers, HC-SR04 Ultrasonic Sensor, ESP8266 NodeMCU, and Servo.
• 5V: Connected to VCC of HC-SR04 Ultrasonic Sensor and Servo.
• D21/SCL: Connected to D1 of ESP8266 NodeMCU.
• D20/SDA: Connected to D2 of ESP8266 NodeMCU.
• D19/RX1: Connected to pin2 of a 3000 Ohm resistor.
• D18/TX1: Connected to pin2 of another 3000 Ohm resistor.
• D2 PWM: Connected to ENA of the first L298N DC motor driver.
• D3 PWM: Connected to IN1 of the first L298N DC motor driver.
• D4 PWM: Connected to IN2 of the first L298N DC motor driver.
• D5 PWM: Connected to IN3 of the first L298N DC motor driver.
• D6 PWM: Connected to IN4 of the first L298N DC motor driver.
• D7 PWM: Connected to ENB of the first L298N DC motor driver.
• D8 PWM: Connected to ENA of the second L298N DC motor driver.
• D9 PWM: Connected to IN1 of the second L298N DC motor driver.
• D10 PWM: Connected to IN2 of the second L298N DC motor driver.
• D11 PWM: Connected to IN3 of the second L298N DC motor driver.
• D12 PWM: Connected to IN4 of the second L298N DC motor driver.
• D13 PWM: Connected to ENB of the second L298N DC motor driver.
• D24: Connected to ECHO of HC-SR04 Ultrasonic Sensor.
• D22: Connected to PWM of Servo.
• D23: Connected to TRIG of HC-SR04 Ultrasonic Sensor.

L298N DC Motor Driver (First)

• 12V: Connected to VIN of Arduino Mega 2560.
• GND: Connected to GND of Arduino Mega 2560.
• OUT1: Connected to vcc of the first hobby motor.
• OUT2: Connected to GND of the first hobby motor.
• OUT3: Connected to GND of the second hobby motor.
• OUT4: Connected to vcc of the second hobby motor.

L298N DC Motor Driver (Second)

• 12V: Connected to VIN of Arduino Mega 2560.
• GND: Connected to GND of Arduino Mega 2560.
• OUT1: Connected to GND of the third hobby motor.
• OUT2: Connected to vcc of the third hobby motor.
• OUT3: Connected to vcc of the fourth hobby motor.
• OUT4: Connected to GND of the fourth hobby motor.

HC-SR04 Ultrasonic Sensor

• VCC: Connected to 5V of Arduino Mega 2560.
• GND: Connected to GND of Arduino Mega 2560.
• TRIG: Connected to D23 of Arduino Mega 2560.
• ECHO: Connected to D24 of Arduino Mega 2560.

ESP8266 NodeMCU

• D1: Connected to D21/SCL of Arduino Mega 2560.
• D2: Connected to D20/SDA of Arduino Mega 2560.
• GND: Connected to GND of Arduino Mega 2560.
• RX: Connected to pin1 of a 3000 Ohm resistor.
• TX: Connected to pin1 of another 3000 Ohm resistor.
• EN: Connected to VIN of ESP8266 NodeMCU.
• VIN: Connected to EN of ESP8266 NodeMCU.

MPU-6050

• SCL: Connected to D1 of the second ESP8266 NodeMCU.
• SDA: Connected to D2 of the second ESP8266 NodeMCU.
• GND: Connected to GND of the second ESP8266 NodeMCU.
• VCC: Connected to 3V3 of the second ESP8266 NodeMCU.

Pushbutton

• Pin 4 (out): Connected to D5 of the second ESP8266 NodeMCU.
• Pin 4 (out): Connected to D6 of the second ESP8266 NodeMCU.
• Pin 3 (out): Connected to pin2 of a 10000 Ohm resistor.
• Pin 3 (out): Connected to pin2 of another 10000 Ohm resistor.
• Pin 1 (in): Connected to Pin 1 (in) of another pushbutton.

9V Battery

• -: Connected to GND of the second ESP8266 NodeMCU.
• +: Connected to VIN of the second ESP8266 NodeMCU.

2.1mm Barrel Jack with Terminal Block

• NEG: Connected to - of the first 9V Battery.
• POS: Connected to + of the first 9V Battery.

Resistor

• pin1: Connected to RX of the first ESP8266 NodeMCU.
• pin1: Connected to TX of the first ESP8266 NodeMCU.
• pin1: Connected to 3V3 of the second ESP8266 NodeMCU.
• pin1: Connected to VCC of MPU-6050.
• pin2: Connected to D19/RX1 of Arduino Mega 2560.
• pin2: Connected to D18/TX1 of Arduino Mega 2560.
• pin2: Connected to Pin 3 (out) of the first pushbutton.
• pin2: Connected to Pin 3 (out) of the second pushbutton.

Documented Code

Arduino Mega 2560 Code

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

}

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

}

ESP8266 NodeMCU Code

// No code provided for this microcontroller.

This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and documented code.