From: Dave (iluv2see_at_yahoo.com)
Date: Sat Jul 20 2002 - 20:34:35 EDT
Thanks for the info on the voltage Steve... I will disagree on the USB
port though... I am currently running a Storix USB 20Gig hard drive with
this same 600E..plugged it in, loaded the driver, and has been running
flawlessly for 2 weeks.
Dave
"Steve C." wrote:
>
> A different laptop won't help, you will have to use an
> external power supply.
> Signals on a parallel port are 5 volts but all the
> chips in a laptop are low power devices to save the
> battery so they won't put out enough power on the pins
> to run anything. Older desktop machines had more
> robust circuitry and were able to run accessories but
> newer ones may not be able to do that either.
> Lots of desktop machines had 5 volts tied to some
> unused pins on the connector that could be used to
> power accessories although laptops probably don't have
> that kind of setup and there was no standard for it.
> The same is true of serial ports and USB. Serial ports
> on a desktop are supposed to put out +/- 12 volt
> signals and can withstand 35 volt overloads before
> blowing out. Laptops may only put out +5/-0 volts and
> blow out at just 15-20 volts.
> USB on laptops has the same problem. The port won't
> put out enough power to run anything that is more of a
> load than a mouse. If you try an external hard drive
> that connects to the USB port it won't work on a
> laptop but will work on desktops.
>
> --- Dave <iluv2see_at_yahoo.com> wrote:
> >
> >
> > Anybody know if the parallel port voltage on a 2645
> > 3AU is 5 Volts or
> > something else?.. I'm programming some eeprom chips
> > with a cable
> > attached via the parallel port... works on 2
> > different desktops fine,
> > but no go with the laptop... I know this cable
> > requires 5 volts to
> > operate, so this may be the problem... if this
> > laptop is NOT 5 volts,
> > would I have to go to an older model to get same? or
> > (unthinkable)
> > another brand??
> >
> > Thanks.
> >
> > Dave
> >
>
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