Meta40
This is based on Metalab's Metaboard, which is a USB based prototyping board for Atmel's AVR microcontrollers. I needed a simple prototyping solution for USB circuits with an ATmega32, but the original Metaboard is designed for the smaller 28-pin controllers (ATmega8, ATmega168...). So I created a new circuit based on the Metaboard. The key features stayed the same:
- Power source from USB or from an external supply.
- USB-bootloader that can be activated by a jumper.
- Provides all relevant pins to the outside world.
I just made some things different:
- Designed for 40-pin controllers. Everyone that is pin-compatible to the ATmega32 should work.
- Used the USB-setup that worked for me in other projects. The Metaboard's circuit is slightly different in this area.
- No prototyping area. Instead of that, all IO-pins of the controller are delivered to four separate connectors or one big 40-pin connector.
- Power LED
Just as with the original design, there's no ISP-connector on this board. You have to program the bootloader in a separate environment.
You don't have to connect all the parts of the board. If you are sure that you don't intend to do something that needs to be powered externally, you can save the money for the necessary components.
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