I wonder if medium-sized formats make sense.

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we know arduino uno "small" 22-pin format , mega 2560 takes "large" 72-pin format. (i'm talking i/o pins) wonder if few medium-sized formats can make sense.

Über-uno format: 32-pin format (sized between uno , mega, top row headers arranged 10-8-4 pins , bottom row 8-8-4) - size 40/44/48 pin parts atmega1284, pic24fv32ka304 or stm32f103cb.

sub-mega format: 56-pin format (mega-sized, using single-row 18-pin headers instead of double-row 36-pin headers @ far end of board usb port, fit inner row of above header) - think format 64-pin parts atmega128a , atmega2561. atmel's 64-pin parts have weird programming arrangement (using uart0 tx/rx miso , mosi) separation of programming , spi headers required here. chip can benefit format stm32f103rg (1m flash! still 96k sram though...)

Über-mega format: 114-pin format (slightly wider board mega, uses double-rowed top , bottom pin headers except power pins.) - format big enough export pins on 144-pin part atsam3x8e (a new due please, using format?) or stm32f103zg.

i have few atmega128 chips maybe can start designing sub-mega 128a board now. want 1 , play it?

why push 32 io boards lot larger? i'd prefer keeping more uno size.
http://www.crossroadsfencing.com/bobuinorev17/


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