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@article{195951,
        author = {Vadde Veerendra and Orekal Katike Mahammad Rafiq and Uppari Mokshagna and Madire Santhosh and Mr S.mahaboob basha},
        title = {Coin Based Mobile Charging System},
        journal = {International Journal of Innovative Research in Technology},
        year = {2026},
        volume = {12},
        number = {11},
        pages = {1588-1596},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=195951},
        abstract = {The rapid growth of mobile phone usage has significantly increased the demand for reliable charging facilities, especially in public places. In many developing countries, frequent power outages and limited access to continuous electricity—particularly in semi-urban and rural areas—make mobile charging a persistent challenge. To address this issue, a coin-based mobile charging system is designed and developed in this project. The proposed system operates as a vending-machine-type mobile charger, where users can charge their mobile phones by inserting a coin. Once a valid coin is detected through the GD007 coin sensor, a signal is sent to the microcontroller, which activates a relay to supply power to the charging port for a predefined duration. The charging process is controlled by the microcontroller software to ensure constant and safe charging. An LCD display is used to show the remaining charging time, providing clear information to the user. A buzzer alert is activated when the charging time drops below 20 seconds, notifying the user to disconnect the mobile phone. If no coin is inserted, the relay remains inactive, and charging does not occur. This coin-based mobile charging system offers a cost-effective, user-friendly, and efficient solution for public mobile charging, making it highly suitable for locations such as bus stands, railway stations, shopping malls, and rural areas with limited power availability.},
        keywords = {Coin Sensor, GD007, Arduino Uno, Relay Module, LCD Display, Buzzer, Embedded System, Public Charging Station.},
        month = {April},
        }