[sdiy] touchplate keyboard - works!

[Ian Fritz]

At 09:35 PM 2/4/2005, Peter Grenader wrote:

>Each key (stage) has the following inputs/outputs/controls:
>
>Send input (from the Sergecircuit - a pulse pulls the stage active)
>
>Gate output (remains high until another stage is selected)
>
>Pressure Output
>
>Voltage output (from the voltage level pot)
>
>Voltage Level Pot (sets the voltage output for that stage)
>
>LED indicator (lights when stage is active)


I'm missing something. Could you clarify how you get a pressure output? It 
seems to me the piezos just put out a pulse. In fact, it's impossible to 
get a dc voltage from a piezoelectric transducer, since they are capacitive.