[simpits-tech] To gene or any other programmer

[fitchett]

> Ahhhh. i See -  this works in a slightly other manner than i
> expected.... first you ask to read row 1 read the states and then row 2,
> read the states ect. not all rows at once.....
>
> but isn't the diods turned the wrong way on the schematics? i mean if
> "Mod 1 row X" is input 5v and "D0-D7" outputs, then i think the diods is
> turned the wrong, because it is blocking the signal even if the switch
> is closed....

I've been naming the rows as the horizontal, which would be the drivers,
and the columns are the inputs on the vertical.

My doc is at
http://www.phidgets.com/phidget-interfacekit/phidget-interfacekit_hardware.html
http://www.phidgets.com/phidget-interfacekit/ScannedDigitalInput.html

> Why aren't they using this in a keyboard i wonder - no more dead keys...
> or is this ancient history

Saves about $1.00 per keyboard.  People who do normal things with
keyboards would never notice dead keys.

> Thanks Chester and G.
>
> /Stig
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