Made with PIC16F873 microcontroller calculator project .. keypad buttons are used for standard HD44780 LCD assembly prepared with the software. Asm. Hex code there. Addition, subtraction, multiplication, division, decimal and hexadecimal number systems, computing the square root, the inverse... Electronics Projects, PIC16F873 with LCD Display Calculator Circuit "microchip projects, microcontroller projects, " Date 2019/08/04