Build robots and mechatronic systems, starting from your first circuit
Free engineering tutorials by a mechatronics engineer in Germany. Each project includes wiring diagrams, tested code, 3D-printable parts, and written explanations. Topics range from Arduino and ESP32 basics to robotic arms and IoT systems.
The engineering behind every build, not just the steps
Most tutorials show you what to connect. Here, you also learn why it works. Each project treats electronics, mechanics, programming, and 3D design as one system, so you actually understand what you’re building.
Start from zero
No engineering background needed. Start with Arduino basics and build your first working project. Each step is explained with diagrams.
Build complete systems
Go beyond blinking LEDs. Build Bluetooth robot cars, 6-DOF robotic arms, IoT devices, and 3D-printed assemblies that actually work.
Grow into advanced robotics
The site is growing to cover sensor fusion, ROS, computer vision, and AI-driven robotics. Start simple and keep going as far as you want.
Choose your learning path
Pick the track that fits your goal. Each path goes from setup to a working project.
I’m New to Arduino
Learn how circuits and code connect. Build your first sensor-driven projects from scratch, no prior experience needed.
Path 02I Want to Build a Robot
Bluetooth-controlled mobile robots, line-followers, fully articulated 6-DOF robotic arms. You design, 3D-print, wire, and program the whole thing.
Path 03I Want to Learn Sensors & Actuators
Learn to use servo motors, ultrasonic sensors, motor drivers, and Bluetooth modules, the core components behind most robots.
Path 04I Want to 3D Print Robot Parts
Learn the CAD-to-print workflow: model parts in Autodesk Inventor, slice in Cura, and print functional robot components.
Robotics
View all robot tutorials →These tutorials walk you through building robots from scratch: Bluetooth-controlled mobile platforms, line-following cars, and fully articulated 6-DOF robotic arms. Each project covers mechanical design, 3D-printed parts, wiring, Arduino code, and testing. Start with a simple mobile robot and work your way up.
Building a Line Following Robot with TCS34725 RGB Sensor
28. December 2024
Complete tutorial for building an advanced TCS34725 line-following robot with Arduino and PID control. Covers 3D chassis design, wiring, sensor calibration, PID tuning, and full code walkthrough. The natural upgrade from the beginner KY-033 line follower project.
Building a Line Following Robot with KY-033 Sensors for Beginners
14. December 2024
Learn how to build a KY-033 line following robot with Arduino from scratch. This beginner tutorial covers 3D design, assembly, wiring, Arduino code, testing, tuning, and troubleshooting for a complete DIY line follower robot project.
OmObiArm: Building a Mobile Robot with an Integrated Robotic Arm Using Arduino and Bluetooth Control
22. November 2024
Build OmObiArm, a DIY Bluetooth-controlled mobile robot arm powered by Arduino Mega, HC-05, Adafruit Motor Shield, and PCA9685 servo driver. Complete tutorial covering 3D design, assembly, wiring, Arduino code, MIT App Inventor app, calibration, troubleshooting, and FAQ.
IoT Projects
View all IoT tutorials →Connect your microcontroller to the real world. Build Bluetooth control systems, IR remote interfaces, keypad-secured smart locks, and wireless sensor devices. Each project teaches a practical communication protocol and how to automate things with Arduino.
Control a Servo Motor with Joystick and OLED Display — Arduino Tutorial
3. October 2025
Learn how to control two servo motors with a joystick and SSD1306 OLED display using Arduino. Complete beginner tutorial with wiring diagram, full code, code explanation, calibration tips, troubleshooting, and FAQ.
Arduino IR Remote Tutorial: Control an LED, Then Add a Servo Door
6. September 2025
Build an Arduino IR remote LED controller with a KY-022 receiver, then upgrade the same circuit to operate a servo-driven door. Includes wiring diagrams, IR scanner code, complete Arduino sketches, troubleshooting, and FAQ.
Arduino Password Door Lock with Keypad and LCD
24. August 2025
Step-by-step tutorial for building an Arduino password door lock using a 4×4 keypad, 16×2 I2C LCD display, and SG90 servo motor. Includes full wiring diagram, complete Arduino code, line-by-line code breakdown, testing tips, troubleshooting guide, FAQ, and upgrade ideas.
Sensors & Actuators
View all sensor & actuator guides →Learn to wire and program servo motors, ultrasonic distance sensors, motor drivers, Bluetooth modules, and other common components. Guides include pinout diagrams, tested Arduino code, and an explanation of how each component works. You’ll use these skills in almost every project on the site.
Arduino and HC-05/HC-06 Bluetooth Module Complete Tutorial
26. June 2024
This tutorial walks through the HC-05 and HC-06 Bluetooth modules with Arduino. You’ll wire up the module, control an LED over Bluetooth, build a basic app in MIT App Inventor, and then take it further with relay-based lamp control. I also cover the common issues people run into and a few frequently asked questions.
L298N Motor Driver with Arduino: DC Motor Control Guide
7. June 2024
The L298N is a dual H-bridge motor driver, and it is one of the most common ways to control DC motors with an Arduino. Here I go through the pinout, how to wire it up, how PWM speed control actually works, and how to set motor direction in code. There is also a troubleshooting section for the issues that tend to come up.
Arduino Ultrasonic Distance Sensor: HC-SR04 Tutorial with Wiring and Code
7. May 2024
The HC-SR04 is probably the first distance sensor most people try with Arduino, and for good reason — it is cheap, simple to wire, and works well for basic projects. I explain how it measures distance using ultrasonic pulses, walk through the wiring, and include tested code you can upload right away. There are also a few project ideas and fixes for common problems.
3D Design & Print
View all 3D design tutorials →Design robot parts in Autodesk Inventor, slice them in Cura, and 3D-print components that fit into your builds. Most robotics projects on the site include CAD-to-print guidance, so you can make custom mechanical parts for whatever you’re building.
Introduction to 3D Printing: Workflow, Materials, Inventor, Cura, and Beginner Tips
9. May 2024
A complete beginner guide to 3D printing basics covering FDM technology, materials, the CAD-to-print workflow with Autodesk Inventor and Cura slicer, printer setup, troubleshooting, and practical project ideas for makers and engineers.
Real projects, real understanding
OmArTronics is run by Omar, a mechatronics engineer in Germany. Every project here is a complete, reproducible system: electronics wired, code tested, mechanics designed, and 3D parts ready to print.
If you want to understand the engineering, not just copy a wiring diagram, that’s what this site is for. Each guide explains the reasoning behind every step, whether you’re connecting your first sensor or building a robot with sensor fusion.