On Mon, Jul 28, 2014 at 9:13 AM, Miguel Garcia gacuest@gmail.com wrote:
Peter Green is right. We need 6 ADCs.
2014-07-27 17:06 GMT+02:00 Luke Kenneth Casson Leighton lkcl@lkcl.net:
but you should be able to do keyboard matrix scanning to cover 16 buttons, 4 input 4 output... unless you really really want all possible button combinations, hmmm...
are there any keys which may not be pressed together, so you can do matrix-scanning on those, at least?
Matrix-scanning is not a good idea. We want all possible button combinations.
thought so :)
ok so you have an IC for the GPIO, and one for the ADC. i'm happy to help you with the PCB: would you like to try sending me a DXF file with the outline of the PCB edge, maybe also where the buttons are supposed to go? we can see if i can import it?
l.