A custom IoT controller that manages street lighting over LoRaWAN and turns each streetlight into a fixed BLE beacon for proximity-based smart city services.

This project demonstrates a simple yet highly effective SDR (Software Defined Radio) receiver based on a dual-conversion superheterodyne architecture using two NE612 mixer ICs.

A replacement PCB for Hori Pad Mini controllers supporting software calibration & Hall Effect sensors.

Automatische Bewässerungssteuerung für bis zu 4 Pflanzen mit ESP8266 und Home Assistant Integration. ✅ 4x Kapazitive Bodenfeuchte-Sensoren (korrosionsbeständig) ✅ 4x Pumpen mit individueller Steuerung ✅ Wassertank-Füllstandsüberwachung mit Schwimmer ✅ 2x Hardware-Buttons für Standalone-Betrieb Betriebsmodi: • AUTO: Kontinuierliche Überwachung, automatisches Bewässern bei Bedarf • MANUELL: Pumpensteuerung über Schalter • NOTAUS: Automatisch bei leerem Tank Sicherheit: • Interlock - nur 1 Pumpe gleichzeitig aktiv • Timeout-Schutz gegen Überflutung • Keine Pumpenaktivierung ohne Wasser Alle Parameter über Home Assistant einstellbar (Schwellenwerte, Bewässerungsdauer, Intervalle). Komplette Logik läuft auf dem ESP - keine HA-Automationen erforderlich. Hardware: ESP-01, MCP23017, ADS1115, MOSFETs PCB: 2-Layer, 97x76mm, komplett Open Source

A Short PCB tutorial so you can make your first PCB.

One of the best Chinese produced Energy Monitor ASICs now easier than ever to use

This project is the development of a fully integrated, standalone Voice Assistant built upon the ESP32-C6 microcontroller. It leverages two major cloud AI services—Gemini 2.0 Flash for intelligence and Murf AI for realistic speech generation—to create a seamless, conversational experience for the user.

Project #12: Robotics - 4WD Robot Car - Mk34

This project transforms basic components like LED strips and an Arduino into a professional-grade arcade experience

Discover the potential of the 2.8” ESP32 Miner Display by Elecrow: a compact development board that integrates a powerful ESP32 microcontroller with a TFT touchscreen, Wi-Fi, and Bluetooth connectivity. In this project we explore its features, hardware architecture, and development possibilities using the Arduino IDE. The tutorial shows how to configure the board, upload example code, and create graphical interfaces, turning this device into a versatile platform for IoT dashboards, smart home control panels, and embedded HMI applications.

The DIY Heating Booster helps you get more out of your existing radiator – without modifying your heating system. An ESP32 controls 12V fans mounted underneath the radiator, automatically turning them on when the radiator gets warm to efficiently distribute heat throughout the room. The control logic works standalone with a local temperature sensor, but can also be fully integrated into Home Assistant. Perfect for cold spots, smart upgrades, and energy-saving DIY solutions.

This project demonstrates real time Machine Learning on the edge by evaluating hand drawn digits on an ESP32 P4 touch display using a custom quantized PyTorch neural network.

Turn any wired doorbell into a smart Home Assistant trigger! This PCB uses a D1 Mini and optocoupler to detect the bell press directly from the existing transformer, no additional power needed. Fully isolated and ESPHome-ready—just wire it in and go.

Learn how to make PCBs at home using just two materials.

Openterface KeyMod is a compact USB/Bluetooth HID emulator that turns your phone into a portable keyboard and trackpad. This project shows a quick, repeatable setup for local control of kiosks, signage players, mini PCs, and lab rigs when a full keyboard and mouse aren’t at hand.