Seems to me a simpler solution is to develop a standardized pinout for the mcu + minimum parts and prototype pcbs that take the standardized pin out. So you simply insert a this "mcu board" into the prototype pcb and you get different kinds of avr/arduino board.

The mcu board should just contain the mcu, (optional) oscillators / crystals, and pin outs. You can make it based on lqfp48/64, depending on the largest mcu you want to incorporate. The prototype pcb would supply power.

Thanks for the input. Having the option of choosing different MCUs is an interesting idea. However, I decided to go with the 328P because it is the most compatible MCU with Arduino projects makers have built around the world. Although it may be a good idea to design at least one board for an Attiny and one for a big, 64 pin, Mega.

Hey guys, I would like to share this Arduino compatible board I designed a few weeks ago. It's meant to be a deployment platform for the projects you've developed with Arduino.

• Powered from 2xAAA Batteries.
• 5V Boost regulator up to 180mA.
• Permanent breadboard with 25 Columns.
• GND and VCC lines along the board.
• Based on the Atmega328P.
• Designed to fit inside 8mm video tape cases.
• Programmable via FTDI, AVR-ISP and an Arduino.

http://www.indiegogo.com/permaduino/x/1029150?c=home

Thanks =)    got it.

I am working with 2 char[10] arrays.
The problem is that when I try to copy the contents of array X to array Y, array X prints XX:
------------
///copy code
for (int i=0;i<10;i++)
          {
            pcode = code;
          }
------------
The result is:
code: 2C00AC2B302C00AC2B30
pcode value: 2C00AC2B30

NOTE: if I remove the code above I get as result
code: 2C00AC2B30
pcode value:



///print code
   if(readRFID())
   {
     Serial.print("code: ");
     Serial.println(code);
    
     Serial.print("pcode value: ");
     Serial.println(pcode);
    
   }

Is there any way to check if I wired it wrong?