A PC can certainly generate a lot of frequencies. But if you want to use the audio channels at 60KHz there is a little problem. There is a brick wall filter in the audio channel set at about 25 KHz.
Now I could set up the audio to output 15 KHz I and Q and mix it (quadrature mixer) with 45 KHz X 4 (precision source) to get 60 KHz. And then filter it to get the 60 KHz. Which requires some op amps. And filters. A precision 45 KHz source. A gray code counter (divide by 4). And stuff. Easier to work at DC (my "audio" signal) and mix that up to 60 KHz directly. Besides. I do like designing and building hardware. Engineering is the art of making what you want from what you can get at a profit. I like Polywell Fusion. On Wednesday, January 4, 2017 7:48 AM, Chris Albertson <albertson.ch...@gmail.com> wrote: You don't need to tie up a PC. It could likely output the WWVB signal while it was also surfing the web and reading emails. 60KHz is NOTHING compared to displaying a you-tube video In fact I bet your 48MHz uP could directly synthesize the signal. Look at the ratio of 48 MHz / 60 KHz. The uP can execute about 800 instructions during one cycle of a 60 KHz courier. Your PC can do a million operations during that same one cycle. But go ahead. I'm subscribed to another list dedicated to building stuff with vacuum tubes. I kind of enjoy building with that technology. I used to like building with 70'd vintage 74xxx TTL. city is like lego blocks for big kids. But as a practical matter if you just want something to work, 21st century technology gets the job done. On Tue, Jan 3, 2017 at 6:49 PM, M. Simon via time-nuts <time-nuts@febo.com> wrote: > Sure. I considered software. But I'm a hardware guy. I like designing boards. > The rig was designed to do amplitude and phase simply. The final design will > have a $5 48 MHz microprocessor included. I'm using that one because of speed > and memory. When that proves out I might redesign for a $2 24 MHz processor. > Onesies prices at Mouser > > Besides the hardware better illustrates the concepts than software. And I > don't have to tie up a PC if I don't want to. > > I haven't priced everything out yet because the design is not done. I'd be > surprised if the cost was over $20 in parts for everything - power supply not > included. PCB extra. > > Feel free to send this along to the list if you are inclined. > > Simon > Engineering is the art of making what you want from what you can get at a >profit. > I like Polywell Fusion. > > > On Tuesday, January 3, 2017 5:53 AM, Hal Murray <hmur...@megapathdsl.net> >wrote: > > > > > time-nuts@febo.com said: >> I have come up with a ridiculously simple WWVB simulator that simulates both >> the AM modulation and the BPSK modulation. > > Did you consider software? > > Is the audio on a Raspberry Pi fast enough? > > I haven't looked at any details, but you can get ARM CPUs for ballpark of $5 > on eBay. There is a good chance that one of their IO devices will let you > send raw bits via a DMA channel. > > > > -- > These are my opinions. I hate spam. > > > > > > > > _______________________________________________ > 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. -- Chris Albertson Redondo Beach, California _______________________________________________ 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.