48/56 imput schematics and software

[synco]

Hello.i'm interested in builduing the 48 or 56 input of the megadrum.but i'm not able to find the schematics.i've found only the 32 input version.can anybody help me?

[dmitri]

viewtopic.php?f=3&t=266
Add 2-3 more multiplexers for 48/56 inputs.

[synco]

do you have a schematic for that?

[dmitri]

See Synthex's schematics for his kit to see how he added 3 multiplexers.
viewtopic.php?f=3&t=1139

[synco]

oki.thank you,what controller do you recomend? 32p or 644 like Synthex

[dmitri]

oki.thank you,what controller do you recomend? 32p or 644 like Synthex

only Atmega644 can handle 56 inputs as it can be seen from the fact that 56 inputs firmware versions are only available for this MCU only.

[synco]

and from were do i download thefirmware for atmega 644?i've found only for atmega32p