Yamaha DTXpress/DTXplorer/DTXtreme

--- In DTXpress@yahoogroups.com, "bparker0701" <bparker0701@y...> 
wrote:
> 
> You do have to concern yourself if power (sometimes/usually Pin9) 
is 
> being utilized somehow.  Laptops will only output about 3.3V from 
> this pin, whereas Desktops will typically put out 5V (sometimes 
> higher) and with more umph (current capability to power devices).  
> It's possible that the internal circuitry is "keying" off it to 
> acert the function.  
> 
> I've actually manufactured my own cables with a wall-mount 
> transformer plug to give me a hearty 5V to power the circuitry 
> within the device to be communicated with.
> 
> Good luck.
> 
> Bill
     Bill,
I think your probably right in this voltage thing.  A PC (tower) puts 
out 5V, 12V, -12V, plus possibly others.  What gets me is after 
fighting bios, drivers, windows and such on the laptop, as soon as I 
gave up and plugged my tower back in I turned the brain on about a 
second after turning on the tower --no error message.  The DTX brain 
is happy keying off a voltage (or something).  Is a block diagram or 
schematic available on the DTX brain?  I would like to rig this up 
somehow without causing DTX brain damage if you know what I mean.
     Shuman