The Development of a Unified, Intelligent and Secure ATM Card to Manage Multiple Bank Accounts

The idea behind creating a single ATM card for several bank accounts is to provide customers with multiple bank accounts with greater convenience when banking. Unlike the conventional method of carrying numerous ATM cards, this solution aims to remove the requirement for users to carry several cards and memorize distinct PINs. By combining several account details onto a single card, the suggested design enables users to access their money from any of their connected bank accounts with a single ATM card. The paper specifies the creation of a safe, dependable, and user-friendly system capable of handling various bank account details and transactions. This paper describes the design and implementation of the suggested solution, including the advantages of a single ATM card system. The Arduino Uno microcontroller is utilized for implementation. Once the ATM card is inserted, the machine will demand for a fingerprint. If the fingerprint matches, the display will reveal all linked bank accounts. After selecting a bank, the user’s mobile number will be sent an OTP. The user can specify the desired amount to be collected.