ESP8266 NodeMCU Controlled Dual DC Motor and Servo Circuit

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Circuit Documentation

Summary of the Circuit

This circuit is designed to control two DC motors and a servo motor using an ESP8266 NodeMCU microcontroller. The ESP8266 NodeMCU interfaces with an L298N DC motor driver to control the speed and direction of the DC motors. A servo motor is directly controlled by the ESP8266 NodeMCU. The circuit is powered by a 12V battery, and a rocker switch is used to control the power supply to the circuit. The L298N motor driver receives its power from the 12V battery and also provides a 5V output that is controlled by the rocker switch.

Component List

ESP8266 NodeMCU

Microcontroller with WiFi capability.
Pins: D0, D1, D2, D3, D4, 3V3, GND, D5, D6, D7, D8, RX, TX, A0, RSV, SD3, SD2, SD1, CMD, SD0, CLK, EN, RST, VIN.

L298N DC Motor Driver

Dual H-bridge motor driver for controlling 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.

Motor Amarillo Motorreductor Hobby (x2)

Yellow hobby gear motors for robotics projects.
Pins: vcc, GND.

Battery 12V

Power source for the circuit.
Pins: +, -.

Servomotor SG90

Small and lightweight servo motor for precise control.
Pins: SIG, VCC, GND.

Rocker Switch

A switch to control the power supply to the circuit.
Pins: output, input.

Wiring Details

ESP8266 NodeMCU

D0 -> L298N DC Motor Driver IN1
D1 -> L298N DC Motor Driver IN2
D2 -> L298N DC Motor Driver IN3
D3 -> L298N DC Motor Driver IN4
D4 -> Servomotor SG90 SIG
3V3 -> Servomotor SG90 VCC
GND -> Servomotor SG90 GND, L298N DC Motor Driver GND, Motor Amarillo Motorreductor Hobby GND (x2)
D5 -> L298N DC Motor Driver ENA
D6 -> L298N DC Motor Driver ENB
VIN -> Rocker Switch output

L298N DC Motor Driver

IN1 -> ESP8266 NodeMCU D0
IN2 -> ESP8266 NodeMCU D1
IN3 -> ESP8266 NodeMCU D2
IN4 -> ESP8266 NodeMCU D3
ENA -> ESP8266 NodeMCU D5
ENB -> ESP8266 NodeMCU D6
GND -> ESP8266 NodeMCU GND, Battery 12V -
12V -> Battery 12V +
5V -> Rocker Switch input
OUT1 -> Motor Amarillo Motorreductor Hobby GND
OUT2 -> Motor Amarillo Motorreductor Hobby vcc
OUT3 -> Motor Amarillo Motorreductor Hobby vcc
OUT4 -> Motor Amarillo Motorreductor Hobby GND

Motor Amarillo Motorreductor Hobby

vcc -> L298N DC Motor Driver OUT2, OUT3
GND -> L298N DC Motor Driver OUT1, OUT4

Battery 12V

- -> L298N DC Motor Driver 12V
- -> L298N DC Motor Driver GND

Servomotor SG90

SIG -> ESP8266 NodeMCU D4
VCC -> ESP8266 NodeMCU 3V3
GND -> ESP8266 NodeMCU GND

Rocker Switch

output -> ESP8266 NodeMCU VIN
input -> L298N DC Motor Driver 5V

Documented Code

No code has been provided for the microcontroller. The documentation of the code would typically include a description of the functionality implemented, setup and loop functions, and any additional functions or libraries used. Since no code is available, this section remains empty.