raoul@eplunix.UUCP (Nico Garcia) (12/05/90)
Hi, folks. Rather than spend my oh-so-valuable engineering time researching this (until I finish with my other projects, that is), I hope someone out there has built or knows of a commercially available device for this purpose. We need programmable output from a data generator of some sort for controlling some stimulators here. Two bits for each devices, times 6 devices, means at least 12 bit parallel output. I'm looking for 16 bits just in case I need a few extra bits for something else. These parallel outputs need to have programmable signal lengths, from roughly 1 msec to 1 usec, and must be loaded from a GPIB or RS-232 port. It must then free run, cycling through the sequence until stopped by an external signal or computer control. The sequence is 1000 times as long as the minimum pulse width. Low power and low noise would be nice, but are less critical than precise timing control. Anyone out there built/bought one of these? We're a research lab, so I can't *afford* one of the fancy HP $15,000 models, as nice as that would be. And I don't need that kind of power either, those things have bandwidths in the 100's of MHz. I need only a MHz or two maximum. -- Nico Garcia Designs by Geniuses for use by Idiots eplunix!cirl!raoul@eddie.mit.edu