I m doing a project where i want to connect piano to 8051 with help of 8279,m using 8279 because it allows multiple key press and prev key need not b released b4 playing d next(necessary for piano).I want a complete circuit diagram to interface 8279 with 8051

 

Have you used "8279" as a search term? It leads to over 5,000,000 hits - http://www.digchip.com/datasheets/parts/datasheet/227/8279.php

The data sheet should give you what you need.

 

I m doing a project where i want to connect piano to 8051 with help of 8279,m using 8279. I want a complete circuit diagram to interface 8279 with 8051[/QUOTE]