[time-nuts] Could someone please recommend GPIB card
Jim Lux
jimlux at earthlink.net
Mon Oct 10 04:03:01 UTC 2011
On 10/9/11 7:11 PM, Chuck Forsberg WA7KGX N2469R wrote:
> The PCI and USB HPib interfaces I've seen are terribly expensive.
> Wpuld it be possible to fake an interface with a parallel port and bit
> banging?
> Possibly an Arduino?
>
Sure... but surplus NI cards turn up pretty cheap, and the Prologix and
equivalent widgets aren't all that expensive. By the time you take an
Arduino and put it in a box with a power supply, etc (And buy that
darned connector), I'll bet you're pretty close to the $150 cost of a
Prologix USB box. And, then you still have to do the programming, which
is non-trivial if you want to support the entire protocol (I did part of
a IEEE-488 interface with a Z80 some decades ago.. It's 1 Mbyte/sec and
you really do need to support all the handshaking properly.) I imagine
you could probably do a fairly decent job with a FPGA that has a USB
interface. But then, you're still in the $50-100 board range and still
needing the connector, power supply, and box.
There are, of course, ISA cards around for $20-30, but finding drivers,
etc is going to be a chore (of course, that DOS machine with ISA bus
you're running it in probably does have the needed 5.25" disk drive for
the driver)
I guess it depends on whether you want so spend your time building GPIB
interfaces or doing whatever you need the GPIB interface for.
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