This project is an advanced 4-channel relay module designed for home automation and IoT applications. Unlike standard relay boards, this design integrates an LM2596 buck converter for onboard 12V-to-5V power regulation, making it compact, efficient, and safe. It includes reverse polarity protection, ON/OFF jumper control, improved LED indicators, and optimized PCB track widths for handling up to 10A per relay channel.

A compact and powerful USB power supply based on the XL4015 buck converter IC. Designed to deliver stable 5V up to 5A — perfect for powering Raspberry Pi, ESP32, Arduino, and USB gadgets.

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.

This project is an 8-channel relay controller based on the ESP32-C3 SuperMini. It provides multi-platform IoT support out of the box for: ???? Blynk IoT Cloud ????️ Arduino IoT Cloud ????️ Home Assistant (via MQTT) ????️ Amazon Alexa voice control ???? Google Home voice control ???? Tasmota Firmware (for power users) ???? Google Firebase integration

The ultimate beginner’s board to learn, build, and master Arduino the easy way.

This project demonstrates the design and implementation of a Multi-Voltage Regulator PCB that provides 4 output voltages: 12V, 9V, 5V, and 3.3V. The circuit uses four voltage regulators:

The ESP8266 NodeMCU 4-Channel Relay Module project enables easy remote control of up to four appliances in your home using Wi-Fi. By leveraging the ESP8266 NodeMCU and a simple web interface, users can control devices like lights and fans from anywhere. This cost-effective IoT solution provides seamless home automation, turning any home into a smart home with just a few clicks. Perfect for DIY enthusiasts looking to dive into the world of IoT and home automation!

Introducing the Water Wastage Alarm System — a smart, low-cost solution for Indian households to prevent overhead tank overflows. Using an ultrasonic sensor, this system monitors the water level in real-time, activating an alarm when the tank is full. The system displays the water level on an OLED screen, signals warnings with LED indicators, and can even send SMS alerts via the SIM800L module. Not only does it save water and reduce energy bills, but it’s also affordable, easy to install, and perfect for promoting water conservation in every home. A practical and sustainable solution powered by the H2S-Dev board!