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?</title></head><body>
<div>At 2:24 PM -0400 2006/04/15, harrybissell wrote:</div>
<blockquote type="cite" cite>LOL... the title says it all.<br>
<br>
Anyone have it ? Four pins... has to be<br>
ground, reference, and position and force<br>
</blockquote>
<blockquote type="cite" cite>but whobewho ? TIA</blockquote>
<div><br></div>
<div>Finally, a question that I can answer.</div>
<div><br></div>
<div>There are 5 connections. One ground, two for pressure sensor, and
two for position sensor. The ground connection is via the shield on
the USB connection. The rest of the pins are:</div>
<div><br></div>
<div>pin 1: Pressure B (one side of a pressure sensitive
resistor)</div>
<div>pin 2: Pressure A (the other side of a pressure sensitive
resistor)</div>
<div>pin 3: Position B (the output signal)</div>
<div>pin 4: Position A (the driving signal)</div>
<div><br></div>
<div>Take a look at my Sword of Kahless controller user guide and
schematics for all the answers.</div>
<div><br></div>
<div>http://www.tellun.com/motm/diy/tln854/TLN-854.html</div>
<div><br></div>
<div><br></div>
<div>There are four signals and a ground connection between the R2M
control box and the<br>
manual. Two of the signals are for the position sensor (Position A and
Position B), the<br>
other two are for the pressure sensor (Pressure A and Pressure B). The
position sensor<br>
can best be thought of as a 10K potentiometer with a wiper that can be
disconnected. One<br>
side of the potentiometer is connected to ground, the other side is
connected to +2.5 volts<br>
(Position A). When the manual is not being touched, the pot wiper
(Position B) is<br>
disconnected from the potentiometer and is pulled up to +3.65 volts.
Touching the<br>
manual connects the wiper to the potentiometer and a voltage of
between 0 and +2.5 volts<br>
appears at the wiper, depending on where the manual is touched. When
the manual is<br>
released, the voltage on the wiper immediately jumps back up to +3.65
volts.</div>
<div><br></div>
<div>The voltage at the wiper (Position B) does not appear directly at
the output of the R2M.<br>
Instead, the R2M processes the raw wiper voltage to generate both MIDI
data and the<br>
position control voltage and gate signals. This processing results in
a delay of between<br>
2.5 msec and 7.5 msec between when the wiper voltage first drops below
+2.5 volts and<br>
when the R2M gate signal goes high. The position control voltage
changes 50 sec before<br>
the gate signal goes high. When the manual is released, there is a
delay of between 0.3 msec and 5.0 msec between when the wiper voltage
first goes above +2.5 volts and when<br>
the R2M gate signal goes low.<br>
<br>
The pressure sensor simply acts a pressure sensitive resistor. With no
pressure applied the<br>
resistance is large, many megohms, with increasing pressure the
resistance drops, to near<br>
zero with excessive force. This resistance appears as the Pressure A
and Pressure B<br>
signals.</div>
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