Seven Segment Display With Matrix Keyboard

Description: 5x4 Keys matrix Keyboard. Keyboard consists of 20 keys. Consist of Hexadecimal numerals from 0 to 13. Keys are organized as Four Rows & Five Columns matrix Study of techniques like software debouching, Keyboard scanning, key closer, two keys lockout, keyboard encoding & Pausing. 16x2 Liquid Crystal Display. Two 16 rows alphanumeric characters will be displayed. Facility for backlite display. Connect to 8255 using 26 pin FRC Connector. User's Manual with Sample Programs