[57north-discuss] Microcontroller for simulating a USB HID

[Calum Chisholm]

Hi David,
I'm wiring up the keyboard form an old 8-bit machine (a Russian clone of
the zx spectrum [1]), which uses an 8x5 keyboard matrix [2]. My intention
is to be able to connect it to a Raspberry Pi running a variety of
old-school emulators, as well as using it with the original hardware if I'm
ever able to resurrect it.

If I have any input pins left over, I might also add an Atari d-type
connector for a digital joystick.

Cheers,
Calum

[1] http://goput.it/5ow.png
[2] http://www.1000bit.it/support/manuali/sinclair/zxspectrum/sm/matrix.gif


On 26 July 2014 01:03, David Lyon <david.lyon at clixx.io> wrote:

> On 2014-07-26 01:45, Calum Chisholm wrote:
>
>> Hmm... too few I/O pins if I have to do that - the nano only has 14
>> pins, and I need 13 for inputs. I suppose I could add a
>> shift-register, but it's all getting a bit hacky by that point.
>>
>
> Hi Calum,
>
> Just wondering, why 13 inputs? What will this device be doing?
>
> (Seems brilliant to have so many inputs)
>
> Regards
>
> David
>
>
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