Circuit Documentation

Summary

This circuit involves a Wemos D1 Mini microcontroller, a ULN2003A breakout board, and a 28BYJ-48 stepper motor. The Wemos D1 Mini is used to control the stepper motor via the ULN2003A breakout board. The microcontroller is programmed to connect to a WiFi network and control the stepper motor through a web server interface.

Component List

Wemos D1 Mini

• Description: A microcontroller board based on the ESP8266 WiFi module.
• Pins: RST, A0, D0, D5, D6, D7, D8, 3V3, 5V, G, D4, D3, D2, D1, RX, TX

28BYJ-48 Stepper Motor

• Description: A small, inexpensive stepper motor commonly used in various applications.
• Pins: BLUE, PINK, YELLOW, ORANGE, RED

ULN2003A Breakout Board

• Description: A driver board for controlling the 28BYJ-48 stepper motor.
• Pins: In 1, In 2, In 3, In 4, In 5, In 6, In 7, 0V, +5V, ON/OFF jumper switch, BLUE wire, PINK wire, YELLOW wire, ORANGE wire, RED wire

Wiring Details

Wemos D1 Mini

• 5V connected to +5V on ULN2003A breakout board
• G connected to 0V on ULN2003A breakout board
• D4 connected to In 4 on ULN2003A breakout board
• D3 connected to In 3 on ULN2003A breakout board
• D2 connected to In 2 on ULN2003A breakout board
• D1 connected to In 1 on ULN2003A breakout board

28BYJ-48 Stepper Motor

• BLUE connected to BLUE wire on ULN2003A breakout board
• PINK connected to PINK wire on ULN2003A breakout board
• YELLOW connected to YELLOW wire on ULN2003A breakout board
• ORANGE connected to ORANGE wire on ULN2003A breakout board
• RED connected to RED wire on ULN2003A breakout board

ULN2003A Breakout Board

• +5V connected to 5V on Wemos D1 Mini
• 0V connected to G on Wemos D1 Mini
• In 4 connected to D4 on Wemos D1 Mini
• In 3 connected to D3 on Wemos D1 Mini
• In 2 connected to D2 on Wemos D1 Mini
• In 1 connected to D1 on Wemos D1 Mini
• BLUE wire connected to BLUE on 28BYJ-48 Stepper Motor
• PINK wire connected to PINK on 28BYJ-48 Stepper Motor
• YELLOW wire connected to YELLOW on 28BYJ-48 Stepper Motor
• ORANGE wire connected to ORANGE on 28BYJ-48 Stepper Motor
• RED wire connected to RED on 28BYJ-48 Stepper Motor

Code Documentation

Wemos D1 Mini Code

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <Stepper.h>

const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

ESP8266WebServer server(80);

const int stepsPerRevolution = 2048; // 28BYJ-48 için adım sayısı
Stepper myStepper(stepsPerRevolution, D1, D3, D2, D4);

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }

  Serial.println("Connected to WiFi");

  server.on("/", handleRoot);
  server.begin();
  Serial.println("HTTP server started");

  myStepper.setSpeed(10); // RPM cinsinden hız
}

void loop() {
  server.handleClient();
  rotateMotor();
}

void handleRoot() {
  server.send(200, "text/plain", "Stepper motor control");
}

void rotateMotor() {
  myStepper.step(stepsPerRevolution / 8); // 45 derece sağa dön
  delay(2000); // 2 saniye bekle
  myStepper.step(-stepsPerRevolution / 8); // 45 derece sola dön
  delay(120000); // 2 dakika bekle
}

This code sets up the Wemos D1 Mini to connect to a WiFi network and start an HTTP server. The server handles requests to control the stepper motor, which rotates 45 degrees in both directions with specified delays.