"Renee" <[email protected]> wrote: > Forgot to say--no I didn't build the frex. It's software you > download.
> Then you can run it through just the computer (which is all I have > right now) or you can hook up plasma balls. [... skip more interesting stuff] >Samala, >Renee Renee, The program uses the computer sound card to generate the frequencies. This limits it to 20 Hz to 20,000 Hz, and many of the important frequencies are well above that and are out of reach. It only takes a synthesizer chip and a few wideband op amps, and you can easily reach 10 MHz. This would be extremely inexpensive, certainly less than $50 or so. I'm going to make a few that go to 35Mhz so I can use them in the lab as well. I think you mentioned the frex program stops after a certain time. There are zillions of free programs on the web that use the sound card to generate frequencies. I just downloaded this one and tried it. It works perfectly! It only makes sine waves, but the frex needs that as the input signal. It then squares them to drive the electrodes. Here's the scoop: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Signal Generator http://www.techmind.org/audio/siggen.gif Select or enter a frequency (1 to 22050Hz), an amplitude (1 to 32767), choose left or right channel for output. Press "play sound" for a one-second burst, or "start-" and "stop sound" to control the sound continuously (up to a limit of 10 hours!). The Volume slider should duplicate the Wave volume control on your sound-out mixer panel. If the sound is playing, then changes (except the Volume slider) won't be heard until the sound is stopped and restarted. Download: SigGen_1v3.exe New version 1.3, available since May 2011. Supports multiple soundcards and better-matched to Windows Vista/7 sound models. http://www.techmind.org/audio/SigGen_1v3.exe http://www.techmind.org/audio/#siggen ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ There are many, many more similar programs. All you need is the frequency list, which you can also get from many sources. Let me know if this helps. Thanks, Mike Monett -- The Silver List is a moderated forum for discussing Colloidal Silver. Rules and Instructions: http://www.silverlist.org Unsubscribe: <mailto:[email protected]?subject=unsubscribe> Archives: http://www.mail-archive.com/[email protected]/maillist.html Off-Topic discussions: <mailto:[email protected]> List Owner: Mike Devour <mailto:[email protected]>
