This system offers an automated attendance tracking solution by combining RFID technology with IoT capabilities—specifically, NodeMCU (ESP8266) for connectivity and Google Sheets for cloud-based record keeping. It enables real-time capture and tracking of attendance data

The project involves building a mobile robot—likely using an Arduino microcontroller—that autonomously follows a person by measuring distances with ultrasonic sensors .

To design and build a basic laser-based security system that detects unauthorized entry using a laser beam and a photoresistor (LDR), triggering an alarm when the beam is interrupted

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

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 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.

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.

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.

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