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Subject: Re: Thoughts on interfaces.

From: "Dave B" <bongo2001@...>
Date: 2007-04-24

--- In Simmons_Drums@yahoogroups.com, "superwolle70"
<superwolle70@...> wrote:
>
> Hm, I am really no talented tech, but reading the first
> page of the FSR doc tells me that the higher the force,
> the higher the resistance.

That's the right idea, but it's the other way around. The harder
you press on them the less the resistance.

> So technically naive as I am I could imagine that a
> permanent voltage runs through the SDX pads and when
> hitting the pad we get a voltage holler instead of a
> pulse. Is that possible?

You get a quick drop in resistance and quick recovery. It's not
sluggish like I thought it might be. That resistance change can be
converted to a voltage spike, similar to what a piezo produces, but
without the "ringing". Does that make sense? There's a circuit in
the FSR pdf from earlier in the thread (page 23?) that produces a
voltage trigger. That would be a good starting point.

Dave