Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP8266 NodeMCU microcontroller, an L9110 motor driver, and a motor with wheels. The ESP8266 NodeMCU controls the motor driver, which in turn drives the motor. The document includes a component list, wiring details, and the embedded code used in the microcontroller.

Component List

ESP8266 NodeMCU

• Description: A low-cost Wi-Fi microcontroller with GPIO, PWM, ADC, I2C, and 1-Wire capabilities.
• 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

L9110 Motor Driver

• Description: A dual-channel motor driver capable of driving two DC motors.
• Pins: MOTOR B-A, MOTOR B-B, MOTOR A-A, MOTOR A-B, B-IA, B-IB, GND, VCC, A-IA, A-IB

Motor and Wheels

• Description: A DC motor with attached wheels.
• Pins: vcc, GND

Wiring Details

ESP8266 NodeMCU

• D6 is connected to A-IA on the L9110 motor driver.
• D7 is connected to A-IB on the L9110 motor driver.
• GND is connected to GND on the L9110 motor driver.
• VIN is connected to VCC on the L9110 motor driver.

L9110 Motor Driver

• A-IA is connected to D6 on the ESP8266 NodeMCU.
• A-IB is connected to D7 on the ESP8266 NodeMCU.
• GND is connected to GND on the ESP8266 NodeMCU.
• VCC is connected to VIN on the ESP8266 NodeMCU.
• MOTOR A-A is connected to GND on the motor and wheels.
• MOTOR A-B is connected to vcc on the motor and wheels.

Motor and Wheels

• GND is connected to MOTOR A-A on the L9110 motor driver.
• vcc is connected to MOTOR A-B on the L9110 motor driver.

Embedded Code

ESP8266 NodeMCU Code

#define A1A D6
#define A1B D7

void setup() {
  pinMode(A1A, OUTPUT);
  pinMode(A1B, OUTPUT);
}

void loop() {
  digitalWrite(A1A, HIGH);
  digitalWrite(A1B, LOW);
}

This code sets up the pins D6 and D7 as outputs and continuously drives the motor by setting D6 to HIGH and D7 to LOW.

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This document provides a comprehensive overview of the circuit, including the components used, their wiring, and the embedded code. This should serve as a useful reference for understanding and replicating the circuit.