Hello geeks, I hope you all are doing well and looking forward to making something new yet interesting. So, today we have come up with our new project which is a calculator using Arduino. Libraries Libraries used in this project Arduino Library for Proteus: V2.0 (2021, used in this project) · latest version: V4.0 (October 2026) LCD Library for Proteus: V1.0 (2016, used in this project) · latest version: V3.0 (October 2026) Helping Tools Serial Monitor Advance : a serial terminal window for the UART of your board Serial Monitor Expert : the serial monitor with extra debugging tools We all use calculators in our daily life, whether you are working in an office or counting money at the bank, you are buying your daily grocery or doing shopping online, you will find calculators in different for ...