Basic Calculator for Beginners
Category: AT89C51
Designer: RANA MUHAMMAD ADNAN KHALIL
Notes
The circuit is designed in Proteus 7.10, microcontroller is AT89C51 and program is written in KEIL. This is a very basic embedded project. If you have not experience of interfacing LCD, it is recommended to watch LCD interfacing circuit and see the code how LCD is initialized and how data is displayed on LCD. 1. The components used in this circuit are, one microcontroller AT89C51, one 16x2 LCD, one keypad encoder IC 74HC92, some resistors and capacitors. 2. Which key represents which number, it is shown below the switch. 3. Only simple and basic operations of calculator are supported. 4. Its not a professional calculator, but a basic version. Application: 1. This circuit can be used to learn how to interface keypad with microcontroller.