How about USB to an FT232 that talks SPI to a low-cost DAC or digital pot? Would need a stable reference, though. See http://www.sparkfun.com/news/386 and http://www.chinwah-engineering.com/USB_SPI_Interface_Software.html for the methodology. Could also use a parallel DAC via FT232 bit-banging, see www.dlpdesign.com/images/bit-bang-usb.pdf
________________________________ From: Mark Spencer <mspencer12...@yahoo.ca> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Fri, December 30, 2011 2:13:41 PM Subject: Re: [time-nuts] Thunderbolt? (re simple gpsdo.) On a related note is anyone aware of PC controlled (Ie. RS232 or maybe GPIB ?) DAC's that would be suitable for this type of application ? I've also contemplated simply using the DAC of a TBolt but it would seem to be waste of a Tbolt. I'm thinking along the lines of something that might acquired used on an auction site. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
