under $50.00 at most
computer stores and
Moreover, the SCSI controller can manage up to
15 devices as opposed to
the four-drive limit of IDE.
My suggestion? Stay
with IDE and leave SCSI
for the high-end boys.
Q. I have an LED that
has a smoky black
lens, but it doesn’t emit
light when I apply power.
Is it an infrared LED or
what? I thought IR LEDs
there an adapter that will convert the
40-pin IDE connector into a 50-pin
SCSI plug? I know there are
controllers out there, but they are so
expensive. Is there something I can
George C. Boone, II
A. IDE hard drives are so popular
because they are cheaper than
SCSI, which explains why you have
an IDE controller built into your
motherboard, rather than an SCSI.
Unfortunately, you can’t interface the
IDE to SCSI using a simple adapter
cable because — like the USB
question above — the interfaces use
different protocols. That is, they
don’t speak the same language. Not
only are the words different, but so is
the syntax. When one says, “Push,”
the other says, “Huh?”
Your best bet is to buy a SCSI
controller board and plug it into an
empty ISA slot. They can be found for
A. If memory serves me — and in
this case, it does — my first LEDs
were IR and they were smoky to
opaque black. They also had very
little output in the IR spectrum. That
had nothing to do with the black lens,
but rather the very low efficiency of
the LEDs in those days.
The color of today’s lenses is an
evolution of increased output power,
viewing angle, and larger color choice.
NUTS & VOLTS