ODP: Keyboard/Midi Frontend (aftertouch)

[Roman Sowa]

BTW
Recently I 'resurected' aftertouch in my JX8P using single PNP
transistor. It isn't the best way, but works. Before that I could get
aftertouch on one key only by pushing it about 10kg force.
Now it's usefull, but not equally on entire keyboard - in the middle
the sensor is worn out a little.

They used some sort of conductive rubber similar to those used
in LCDs to connect glass with circuitry - black and white (conductive
and isolator) stripes.

Roman

> -----Oryginalna wiadomość-----
> Od:	Haible Juergen [SMTP:Juergen.Haible at nbgm.siemens.de]
> Wysłano:	7 maja 1999 13:44
> Do:	DIY; debus at cityweb.de
> Temat:	AW: Keyboard/Midi Frontend (RE: PolyModular Standards)
> 
> I changed that resistor to the A-50
> value
> 	>too, which made it a bit easier to get aftertouch, but it's still
> hard.
> 	>I'll have to look into that again.
> 
> Reminds me of the infamous JX-8P aftertouch. I remember a Keyboards review
> talking about Sumo Ringers having done the beta test ...
> 
> What kind of sensor elements did they use ? Are they expensive ? Can they
> be
> mounted under other keyboards, too ? 
>