This is a Rotary Tumbler I designed:

You can use a jam jar with a minimal diameter of 8cm and a diameter up to 15cm.

I used following electronic parts to built this:

Motor: 25mm geared DC Motor

H Bridge: AZDelivery Dual H Bridge

Controller: NodemcuV2

I also programmed the ESP8266 to connect to your wifi and make a website, where you can control the motor.

I pasted the code in here because I could't upload it.

#include

#include

const char* ssid = "SSID";

const char* password = "PASSWORD";

ESP8266WebServer server(80);

// Motor control

const int ENA = D1; // Motor speed pin

const int IN1 = D2; // Motor direction pin 1

const int IN2 = D3; // Motor direction pin 2

int speed = 0; // Current speed

void setup() {

pinMode(ENA, OUTPUT);

pinMode(IN1, OUTPUT);

pinMode(IN2, OUTPUT);

digitalWrite(ENA, LOW); // Stop the motor

digitalWrite(IN1, LOW);

digitalWrite(IN2, LOW);

Serial.begin(115200);

// Connect to Wi-Fi

WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) {

delay(1000);

Serial.println("Connecting to WiFi...");

}

Serial.println("Connected to WiFi");

// Create route for the website

server.on("/", HTTP_GET, handleRoot);

server.on("/control", HTTP_POST, handleControl);

server.begin();

}

void loop() {

server.handleClient();

}

void handleRoot() {

String html = "";

html += "

Motor Control

html += "";

html += "Speed: ";

html += "" + String(speed) + "
";

html += "";

html += "";

html += "";

html += "";

html += "";

server.send(200, "text/html", html);

}

void handleControl() {

if (server.hasArg("stop")) {

speed = 0;

digitalWrite(ENA, LOW); // Stop the motor

Serial.println("Motor stopped");

} else {

speed = server.arg("speed").toInt();

speed = constrain(speed, 0, 255); // Limit speed to the range 0-255

analogWrite(ENA, speed); // Set motor speed

digitalWrite(IN1, HIGH); // Motor forward

digitalWrite(IN2, LOW);

Serial.print("Motor started with speed: ");

Serial.println(speed);

}

handleRoot(); // Return to the control page

}