Yamaha DTXpress/DTXplorer/DTXtreme

Well I got it working pretty well. I tried out a lot permutations of
your circuit using a breadboard. The way I had the input and output
hooked up I had to change both tip and grounds for each one and that
made a huge difference. With R1 in the circuit it won't work at all.
The other huge difference comes from the diode. Without the diode it
doesn't work well at all either. The circuit works almost perfectly
with just the transistor and the diode only. VR1 and R2 really don't
seem to make a difference. Sometimes it seems to help and other times
it seems to be worse. It isn't perfect though and I don't know why.
Every few hits it screws up. I've tried messing with the knob on the
kp65 and playing with VR1 and it doesn't seem to help. I don't know if
there is anything that could be done to make it any better? It works
really well, but it still isn't completely perfect. As for the voltage
I believe I read somewhere that the Rock Band kit uses 2.5v for the
pedal input.

--- In DTXpress@yahoogroups.com, "Keith" <keith@...> wrote:
>
> --- In DTXpress@yahoogroups.com, "quique_777" <quique_777@> wrote:
> > The input and output is mono correct? I tried using mono cables for
> > the input and output and also tried all combinations using stereo and
> > mono cables. I'm sure this should be pretty easy, but I half way know
> > what I'm doing in the first place.
> 
> Yes, mono cable is correct - use the tip & sleeve to connect to the
> circuit.
> 
> I don't have access to an Xbox/PS3 but if you have a multimeter you
> could check what the voltage is across the switch when it is all
> plugged in, and what the voltage is when the switch is pressed (zero I
> assume).   Let me know if you can find that out.  Unfortunately, while
> I have loads of equipment which would help me sort it out, I don't
> have the game or any games boxes (just a DTXpress)!
> 
> Keith.
>