Miro's Blog

LED Screen Made of Empty Toilet Rolls Why? The initial idea was to find a creative way to reuse empty toilet rolls while having some fun with Arduino and LEDs. I started by gluing together the first block, consisting of 4x3 LEDs connected to an Arduino Nano. As the project progressed, I thought it would be interesting to control the LED screen directly from an Android device. To make this possible, I added a Bluetooth adapter and developed a  Android app. As time passed and more empty toilet rolls became available, I continued building one block after another. Eventually, I set a goal to create a 4x4 grid of blocks, totaling 192 LEDs. As I expanded the physical screen, I also enhanced the functionality of the Android app, adding new features to control the growing display. first 6 blocks What Can It Do? Since the video below demonstrates it clearly, I'll just briefly list the features of the Android app: Draw (real-time): Allows real-time drawing on the LED screen. Toggle Ra...

Project Overview This project is an exciting fusion of Android development and robotics, combining an Android application with the LEGO NXT cube (v1.0) enhanced by the leJOS firmware. The result? A robot capable of drilling images, among other things! The project consists of two main components: Android Application : This app communicates with the NXT cube via Bluetooth, acting as a controller for various robotic functions. NXT Robot with leJOS Firmware : The NXT cube is upgraded with leJOS, allowing programming in Java, making it more versatile for complex tasks. Android Application The Android app isn't just for drilling images—it's a comprehensive controller for the NXT robot. Initially, it was designed as a multi-functional tool capable of: Controlling the robot’s movement using different programs, like line-following or accelerometer-based controls. Allowing the user to select the type of robot and the corresponding control programs. After pairing the app with the NXT cube...