This DIY electronics project demonstrates how to build an air/gas quality monitoring system using an Arduino, an MQ‑2 gas sensor, and an I2C LCD display. The setup detects gas concentrations such as LPG, CO, and smoke, and continuously displays real‑time levels on the LCD.

This DIY project demonstrates how to create a real-time fire detection and alert system using a NodeMCU ESP8266, a flame sensor module, and the Blynk mobile app. When the flame sensor detects fire, the system alerts the user via the mobile app and optionally activates LEDs or buzzers locally

MicroBlocks is the only LIVE blocks-based programming language for microcontrollers, making it the most intuitive and easy to use tool for getting started in advanced STEM projects! The goal of "STEM 4 All" is to create a LoRaWAN library for MicroBlocks along with a STEM tutorial explaining how to leverage LoRa on this hardware for long-range wireless applications. The tutorial will also cover use of Wi-Fi and BLE for ease of tackling shorter range and higher-bandwidth use cases (Wi-Fi and BLE libraries for ESP32 are already well-supported by MicroBlocks).

This DIY electronics project showcases how to create a simple alcohol sniffing device using an Arduino and an MQ‑3 gas sensor. The system detects alcohol vapors in the environment—commonly used for breathalyzer-style applications—and provides immediate readings and visual feedback

This project demonstrates how to convert a standard bicycle into a high-performance electric bike (e-bike) capable of reaching speeds up to 50 km/h. It involves integrating an electric motor, battery system, throttle controller, and other essential electronics. The project blends mechanical engineering, electrical systems, and DIY fabrication skills to build a cost-effective and powerful personal transportation solution.

We're developing a secure, low-power sensor node using the H2S-Dev board to protect enterprise messaging systems (EMS) from physical and environmental threats. By combining multi-sensor monitoring with encrypted LoRaWAN communication over the Helium network, this system delivers real-time alerts on tampering, intrusion, or environmental anomalies—without relying on Wi-Fi or constant power. It’s ideal for securing remote EMS endpoints, server rooms, or infrastructure cabinets, offering a scalable, cost-effective layer of cybersecurity that integrates seamlessly with existing EMS or SIEM platforms.

This DIY system is designed to detect motion using a PIR sensor and notify the user via the Blynk mobile app. It uses a NodeMCU (ESP8266) as the core IoT microcontroller, connecting wirelessly to your home network to send real-time alerts whenever motion is detected

In today's world of smart living, automation is increasingly becoming a part of our everyday lives. This project focuses on building a simple yet effective home automation system using an Arduino microcontroller and a standard infrared (IR) TV remote. The goal is to allow users to control electrical appliances like lights and fans remotely without modifying the remote or using expensive smart devices. By leveraging IR technology, this project demonstrates how a basic remote control can be repurposed to switch household devices on and off through the use of an IR receiver module and relay circuits. It is a cost-effective, beginner-friendly, and highly educational project ideal for electronics enthusiasts, students, and DIY hobbyists seeking to explore embedded systems and automation.

A portable, GPS-enabled device to measure river water quality at multiple city locations, storing data for later mapping and analysis, built with low-cost sensors and an ESP32 board.

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!

An IoT-based automated plant watering and notification system using a NodeMCU (ESP8266). The system monitors soil moisture levels via a sensor, and when dryness is detected, it notifies the user through the Blynk app. Optionally, it can activate a water pump or grow light via a relay module to irrigate plants automatically.

This project demonstrates a basic electronic security system using an Arduino Uno, a 4x4 keypad, and a relay-controlled electric lock. When a predefined PIN code is entered correctly on the keypad, the Arduino activates a relay that unlocks the door for a short duration, then automatically locks it again. If an incorrect code is entered, access is denied. This system can be expanded with features like an LCD display, buzzer alerts, multiple user PINs, and tamper detection.

The heart of the project is the CrowPanel Advance, a compact and versatile device with esp32 that serves as the assistant's user interface. It's connected via WiFi to a dedicated AI server that I set up on an old laptop, which runs the Ollama software. This is the magic part: Ollama allows me to run powerful large language models locally, so all the processing happens right there.

This is a no-code smart home automation system built around the NodeMCU ESP8266 and a 4‑channel 5 V relay module, configured through the Cadio mobile app—no firmware coding required

This is a real-time GPS tracking project built around the NodeMCU ESP8266 module and a Neo‑6M GPS module, powered by Wi-Fi rather than cellular networks