Soil Moisture Sensor
Build a simple soil moisture threshold detector with a PCB fork sensor, an LM393 comparator, and a relay output for visual and local control.
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Automated Mini Greenhouse with ESP32 and Sensors for Home Assistant
Build a compact smart greenhouse with an ESP32-C3 Super Mini, environmental sensors, and actuators, all integrated with ESPHome and Home Assistant for real-time monitoring and automation.
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Angelo: an open source portable audio amplifier optimized for the human voice
Discover Angelo, an open source portable audio amplifier designed to improve communication with elderly or hearing-impaired people. This project combines simple electronics with a human-centered approach, making it easy to build, customize, and use.
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Iteration3D: Free Online Generator of Parametric 3D Models
Iteration3D is a French web platform that generates customizable 3D models for printing, using a parametric engine to create models on demand based on user specifications.
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Inflatable Robotic Dinosaur: The T. rex You Assemble Yourself
Discover AirForce, a fabrication system from Hasso Plattner Institute that uses a single inflatable tube to build large animated structures, including an eight-meter robotic dinosaur you can assemble alone.
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3D-Printed Frame for a 32×32 LED Matrix with Microphone
A modular 3D-printed frame turns a 32×32 LED matrix into an interactive wall or desk display, with support for an ESP-WROOM-32 and a MAX4466 or MAX9814 microphone for audio-reactive visuals.
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GSM Emergency Call System with RF Receiver for Elderly and Bedridden Patients
This article describes a GSM-based emergency call system with an RF receiver that sends calls and SMS to pre-programmed numbers when a small wearable transmitter is activated. It is designed for elderly people and bedridden patients who need to call for help with a single press of a button.
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TekkaSketch: Reinventing the Etch-a-Sketch with E-Ink and ESP32 Innovation
The iconic Etch-a-Sketch, a toy beloved by generations, always had one major limitation: a drawing mistake meant shaking the entire device and starting over from scratch. With the TekkaSketch project, this limitation is overcome thanks to a modern approach that integrates digital functions while preserving the classic aesthetic. The idea stems from observing the original…
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How to Build a 1000W ZVS Induction Heater Using a Resonant RLC Circuit
Let’s Melt Metals Using the ZVS (Zero Voltage Switching) Technique Applied to a 1,000W RLC Resonant Circuit Have you ever wondered how intense the electromagnetic fields surrounding us can be? This is a relevant question, considering we are surrounded by countless electromagnetic waves, caused by power distribution cables, radio and TV transmitters, mobile phone networks,…
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How to Control NeoPixel Installations via Wi-Fi Using Fishino and NodeMCU with Python
We create NeoPixel light installations with Fishino and NodeMCU controlled via Wi-Fi from a PC or Raspberry Pi using a Python library. A few years ago, the American company Adafruit Industries transformed the LED market by introducing NeoPixels, RGB LEDs that incorporate their own controller in a single package. Adafruit aimed to simplify LED management…
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How to Adjust X and Y Axis Scale in Arduino Serial Plotter (No Extra Software Needed)
The Serial Plotter in Arduino is an excellent tool for quickly visualizing serial data. However, it has a limitation that can frustrate many users: it’s not immediately obvious how to adjust the X and Y axis scales, especially the X axis. In this article, I will guide you step by step on how to solve…
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Building a 3D Digital Clock with Arduino
Project to create a digital clock consisting of 24 3D-printed analog clocks. The clock displays the time in digital format and shows animations between each hour. The clock is composed of 3D-printed parts, 25 Arduino Nano boards, and 48 stepper motors, and each dial uses a custom-designed PCB created with Eagle. The clock…
