Try looking at http://www.i2cchip.com/
I have dealt with them and they are very nice.
I failed to mention that they make a USB to I2c adapter with which you  
can support many modules.
Gus

> On Jun 2, 2009, at 7:25 AM, Gerhard Fiedler wrote:
>
> Hello,
>
> I'm looking for something that provides something like LabVIEW with
> some
> IO card provides, but a lot less expensive. Something that has a few
> general purpose digital and analog IOs and can be easily programmed to
> do simple tasks. Something like repetitively switching a relay on and
> off (as input to a device) and checking whether an output (of the
> device) follows, within a defined time window, logging the reaction
> time
> and any failures, counting the failures and aborting when they reach a
> threshold.
>
> This has to run on a Windows system (and I'm aware of the restrictions
> re timing accuracy).
>
> The cornerstones here are "easily programmed" (by a smart tech) and
> "inexpensive" (say $300 max, but cheaper is better :).
>
> "Easily programmed" does not necessarily mean LabVIEW-style visual
> programming, but must be easier than programming such a task with a
> general purpose programming language using a driver interface to an IO
> device.
>
> Thanks for any pointers,
> Gerhard
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