At that point of time, I did not have a lot of possibilities to buy any commercial development board, so I had to make my own

I wanted to make a small board, not those huge with everything you can imagine, and, perhaps, never going to use. A 3d model shows what I wanted and what I made: 4 buttons + 4 LED hanging on the PORTB. There is also one button and one LED for PORTA. Everything can be disconnected from the microcontroller using the dip switch.

The PCB schematic:

The project is located there –> pic_board.

A small photo of the cool stuff made back like 10 years ago 🙂

and a small video