In today’s fast-paced industrial environment, real-time data access is crucial for efficient monitoring and troubleshooting. Traditional fixed monitoring setups can limit mobility and slow down response times. That’s why we’ve developed a portable Modbus Poller using RainbowLink from DFRobot and UniHIKER, combined with Python and Tkinter for a flexible and user-friendly monitoring solution.

Have you ever thought about DIYing a multifunctional mechanical keyboard for yourself? It can not only meet the needs of your design work, but also switch to various gaming keyboards at any time.

This is an incredibly cheap and visually fascinating toy through which we can learn a lot about the behavior and physics of standing waves.

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 simple way to build a quality multiband receiver using a specialized radio chip.

This project demonstrates how to build a real-time GPS tracker using the Heltec WiFi LoRa 32 V4 and the REYAX RYS352A GNSS module. The tracker hosts its own web interface, allowing any device on the same Wi-Fi network to monitor live location and travel history directly from a browser. The project processes NMEA data locally, displays live coordinates on the onboard OLED, and visualizes the current location and travelled path on OpenStreetMap without relying on cloud services.

Metal detector handmade DIY

A professional-looking VFO for your radio projects without spending a fortune on touchscreen, rotary encoder or complex hardware.

This project demonstrates how to build a simple Voltage Regulator using the 7805 integrated circuit (IC). The 7805 provides a stable 5V output from a higher input voltage, making it ideal for powering circuits and components that require a 5V power supply.

Turn your FPV drone races into fully automated events with this lap timer system! Using Arduino/RX5808 modules per drone channel and a Raspberry Pi running RotorHazard, it logs lap times based on 5.8 GHz signal strength. Easy PCB-based setup with jumper-configurable IDs, I²C connectivity, and full documentation — perfect for racers and event organizers alike.

Learning project with Arduino Nano and sensors

Offline voice-controlled ESP32 meeting room system with synchronized panels and Google Calendar support.

In this project, I convert a classic PCL86 single-ended tube amplifier design to operate with the less common PCL82 vacuum tube. Powered entirely from compact DC-DC converters, this amplifier delivers maximum 2W of warm tube sound with absolutely no audible hum or switching noise.

In this guide, you’ll explore how L293D Motor Driver shield works and how to use it with an Arduino UNO to control DC motors, servo motors, and stepper motors.

For driving Cockroft Walton Multiplier I use stable high voltage source which I made with minimal modification of the old PC power supply. With this setup I achieved a constant spark from more than 30cm and a periodical sparks at a distance of more than 35cm.