NEMIA TOOLS
Online tools, tutorials and lessons for Arduino, electronics and Python
NEMIA TOOLS is a growing collection of online utilities, step-by-step tutorials and lessons for people who want to build projects, learn electronics and use Arduino in a practical way. You will find wiring diagrams, code, component explanations and quick tools that run directly in your browser.
You can start with a complete project such as an obstacle-avoiding robot or a weather station, learn more about servo motors, LCD displays, Bluetooth modules and the NE555 timer, or use tools for web tasks, JSON, colors, passwords and LED resistor calculations.
Learn, build, experiment
What you can find on NEMIA TOOLS
Step-by-step tutorials
Build Arduino, electronics and Python projects with component lists, wiring, code and explanations. The collection includes robots, sensors, Bluetooth, displays, NE555 circuits and other hands-on projects.
Arduino and electronics lessons
Learn how components and modules work before using them in a project. The lessons cover servo motors, 16x2 LCDs with and without I2C, the HC-05, the NE555 and the basics of building a wheeled robot.
Free online tools
Use focused utilities without installing software: check URLs, generate passwords, format and validate JSON, convert HEX, RGB and HSL colors, and calculate a resistor for an LED.
Projects to try
Featured Arduino and electronics tutorials
How to Build an Obstacle-Avoiding Robot with Arduino
A robotics project that combines Arduino, an ultrasonic sensor, motors and control logic to detect obstacles and change direction.
How to Build a Weather Station with Arduino
Read environmental data with Arduino and display it in a complete project that helps you practice sensors, wiring and measurement handling.
How to Control DC Motor Speed with an NE555 PWM Circuit
Learn how to use the NE555 timer to generate a PWM signal and control the speed of a DC motor with a dedicated electronics circuit.
Start with the basics
Useful lessons for your next projects
How to Use a Servo Motor with Arduino
Understand the wiring, angle control and the main differences between 180° servo motors and continuous-rotation servos.
How to Use a 16x2 I2C LCD with Arduino
Learn how an LCD with an I2C interface works, how to wire it and how to control it with Arduino libraries.
NE555 Timer: How It Works, What the Pins Do and How to Use It
A guide to the internal blocks of the NE555 timer, its pins and its most important configurations, including astable and monostable operation.
Quick utilities
Online tools for development and electronics
JSON Formatter
Validate, format, minify and sort JSON data to make API responses and configuration files easier to inspect.
HEX, RGB and HSL Color Converter
Quickly convert colors between HEX, RGB and HSL when working with CSS, web interfaces or graphic projects.
LED Resistor Calculator
Estimate a suitable series resistor from the LED color and the supply voltage of your circuit.