Dear Friends,

I have designed S-52 8051 learning board for beginers. It can be used as a learning aid for a microcontroller student. It has following features..

1. AT89S51/52/53 DIP40 supported. [ Easily available ]
2. In System Programming through 6 Pin header.
3. RS232 interface for PC communication.
4. HD44780 compatible LCD.
5. 4X4 matrix keypad.
6. 11 General Purpose IO micro pins on SIL headers.
7. On board rectifier filter and voltage regulator.
8. Single Sided PCB design.

S-52 can be found here http://www.kmitl.ac.th/~kswichit/s52/s52slb.htm

For In System Programming you can use M. Asim Khans ISP adapter. You can find it here http://www.kmitl.ac.th/~kswichit...gm30a.html
On the same page you can find my PCB layout for the adapter.

The features have been kept bare minimum in order to keep the design the simplest possible so that even a total micro newbie can make it without problems.

Your feedback comments and suggestions are invited.

Regards,
Prahlad Purohit