http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/177 2026-04-15T21:29:38Z 2026-04-15T21:29:38Z Islam, Md Najmul http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/15315 2025-11-04T21:01:07Z 2024-02-08T00:00:00Z

Fan Speed Control Using Remote and Android Islam, Md Najmul The project focuses on creating a sophisticated system to regulate the speed of an AC fan utilizing both an infrared (IR) remote control and Bluetooth technology. The primary goal is to enable users to adjust the fan's speed remotely and effortlessly through two distinct methods. The system integration involves a series of hardware components, including an IR receiver module, Bluetooth module, microcontroller, motor driver, and the AC fan unit. For IR remote control functionality, the microcontroller is programmed to interpret and decode signals transmitted by the IR remote. Specific commands from the remote control are linked to various speed settings of the AC fan. Users can manipulate the fan speed, increasing or decreasing it based on the signals received by the microcontroller. The motor driver acts upon these commands, adjusting the fan's speed accordingly. Simultaneously, Bluetooth integration enables remote control through wireless communication between the microcontroller and a Bluetooth-enabled device, such as a smartphone or tablet. These commands are received by the microcontroller via Bluetooth, enabling an alternate method for fan speed adjustment. project

2024-02-08T00:00:00Z Sikder, Pratul Kanti Raj, Obaidullah Hasan http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/15314 2025-11-04T21:01:12Z 2024-02-10T00:00:00Z

Water Dust Cleaning Robot Sikder, Pratul Kanti; Raj, Obaidullah Hasan This project presents the design, development, and implementation of a water dirt- cleaning robot with Bluetooth control capabilities. The robot is designed to navigate indoor spaces, effectively removing dirt, dust, and debris from various surfaces using a combination of water-based cleaning mechanisms. The integration of Bluetooth technology allows users to remotely control the robot's movements and cleaning functionalities via a dedicated mobile application. The robot's hardware consists of a robust chassis housing a water tank, cleaning brushes, and maneuverable wheels for seamless navigation. The Bluetooth-enabled control system gives users real-time access to the robot's functions through a user-friendly mobile interface. Users can initiate, pause, or modify cleaning tasks and adjust cleaning modes. This innovation offers a convenient and adaptable solution for maintaining cleanliness in homes, offices, or commercial spaces. The integration of Bluetooth control enhances user experience by providing flexible and intuitive operation, marking a significant advancement in automated cleaning technology Project

2024-02-10T00:00:00Z Arko, Ramit Sarker, Mita http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/15313 2025-11-04T21:01:10Z 2024-02-10T00:00:00Z

Monitoring System of Food Warehouses By Using Single Board Computer Arko, Ramit; Sarker, Mita Problem arose when the price of the daily consumed foods suddenly increased and the quality dropped significantly due to reinless syndicates and poor food management as the daily news were flooded by the reports in the year of 2022 and 2023 at an alarming rate in Bangladesh. Where investigations of Director of National Consumer Rights Protections described the lack of data records is the prime culprit for the situation. We collected data from different food suppliers from Dhaka to narrow down the problem and create a sustainable solution for the issue which is digitally collecting data by implementing Wireless Sensor Networking System and monitoring the value in real time. Sensors will be installed in warehouses where foods are being stored for collecting data then a single board computer will act like a hub which will send the data to the cloud server so that multiple devices can connect to the server aiming to monitor the real-time value. We created a project using Raspberry Pi 4B as single board computer and DHT 22 sensor for collecting the data of both the humidity and the temperature and ran the project for several months for collecting the value difference. Then we analyzed the outcome which led the conclusion for better waste management, strong monitoring and easy data record that will slow down the issue and will help in total GDP in Bangladesh. Project

2024-02-10T00:00:00Z Antu, Alindo Ghosh Roy, Prosanto Kumar http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/15311 2025-11-04T21:01:10Z 2024-02-10T00:00:00Z

Frequency And Transient Stability Analysis of A 7-Bus Bar System Using PSAF Antu, Alindo Ghosh; Roy, Prosanto Kumar This study provides an investigation of voltage, frequency, and transient stability in a 7-busbar system utilising the Power System Investigation Toolbox CYME PSAF. The Newton-Raphson method is acknowledged for fast computational applications. The analysis is conducted in scenarios involving both normal and faulty circumstances. Under typical operating conditions, it has been observed that the system exhibits stability, with the voltage and frequency values remaining within acceptable thresholds. Nevertheless, it has been shown that the system exhibits instability in some fault scenarios and when certain fault clearance durations are applied. The examination of transient stability is conducted via the Equal Area Criterion (EAC). The Equivalent Area Criterion (EAC) is a straightforward and efficient technique used to assess the transient stability of a power system. The analytical results indicate that the 7-busbar system exhibits susceptibility to transient instability when subjected to three-phase faults on the transmission lines that interconnect buses 1 and 2, as well as buses 3 and 4. The system exhibits susceptibility to transitory instability in the event of single- phase-to-ground faults transpiring on bus 7. The analysis further demonstrates that the transient stability of the system can be enhanced through a reduction in fault clearance time. Nevertheless, there exists a trade-off between the duration required to clear faults and the associated expenses. The findings of this study can be applied to the design and operation of the 7-busbar system in a manner that prioritises safety and reliability. Project

2024-02-10T00:00:00Z