With the help of an Arduino UNO board, an electromagnet, a magnet, and a Hall effect sensor, this project tries to create a straightforward magnetic levitation system. The mechanism measures the separation between the magnet and the electromagnet using a Hall effect sensor and regulates the electromagnet's intensity to keep the levitation stable. The project report offers a step-by-step tutorial for constructing the system and writing the necessary Arduino code to operate it

Homes, businesses, industries, and military situations must all be protected from invaders by security systems. They comprise cameras, motion detectors, and alarms that offer round-the-clock surveillance and quick alerts. Modern technology makes it possible to operate and monitor security systems remotely. There are home security systems, CCTV surveillance, motion sensor alarms, and biometric systems like fingerprint or facial recognition. The system that best suits a homeowner's demands and offers peace of mind is theirs to select. In this work we have designed an alarm system which reduces false alarms and increases home security by using cutting-edge sensor technology to detect vibrations from attempted break-ins. It simply interacts with current systems, guaranteeing a complete home security solution.

This project on "Automatic plant irrigation system" aims to develop an automated irrigation mechanism that turns the pumping motor ON and OFF based on the moisture content of the ground. The use of proper irrigation methods is important in the farming area. The advantage of using these systems is that they reduce human meddling while still ensuring proper watering. The suggested model is divided into three steps. The first is sensing the moisture level of the ground. The second stage is determining if it is dry or moist. Motor control is the final level. The construction of an autonomous plant irrigation system capable of detecting moisture loss in soil utilising a soil moisture sensor is proposed in this project. The soil moisture sensor, in particular, is used by the system to measure water content. Specifically, the system employs a soil moisture sensor to measure the amount of water content in the soil and respond appropriately to the observed situation. The system decides whether or not the land needs to be watered based on this reaction. We can only use it in a tiny region in our working model. This technology is our most fundamental step towards automated farming, with the goal of increasing turnover and reducing the impact of drought or loss due to irrigation difficulties..

New, improved locking solutions are replacing older lock systems that use a mechanical lock and key mechanism. These methods combine mechanical and electronic components and are extremely intelligent. One of the standout characteristics of these cutting-edge lock systems is their efficiency and simplicity. Such an automatic lock system comprises of an electronic control assembly that authenticates users through GSM and uses an OTP to control the output. A motor, lamp, or any other mechanical or electrical load could be this output load. Here, we used an Arduino microcontroller to create an electronic code lock system. Our main objective is to build a comprehensive security system using embedded (Microcontroller) and wireless (GSM device) technology. The suggested solution offers a low-cost service with assured high security when compared to competing security systems.

Light-based wireless communication, abbreviated as Li-Fi or Li-Fi, uses light rather than radio waves to send data from one device to another. This technology relies on visible light communication (VLC) to transmit information through light-emitting diodes (LEDs). By modulating the intensity of the light, Li-Fi enables high-speed data transfer and can be used in various applications such as indoor positioning systems and internet connectivity in areas with high radio frequency interference. This concept was first presented by Harald Haas at a TED Global event in Edinburgh in 2011. Li-Fi, short for light-fidelity, is a light communication system that can send and receive data rapidly across the visible, ultraviolet, and infrared light spectrums. Only light-emitting diode (LED) bulbs are currently capable of transmitting data in the visible spectrum. Similar to Wi-Fi from the perspective of the end user, the technology differs primarily in that Wi-Fi transmits data by inducing a voltage in an antenna through radio waves, whereas Li-Fi does so through the modulation of light intensity. Li-Fi can operate in environments where other wireless technologies would be disrupted by electromagnetic noise (e.g. aircraft cabins, hospitals, or the military).