Before everyone says use an converter/inverter please read on to see if what I'm trying to do is possible.
I have a program called cool edit pro which allows me to create different frequency signals on the left and right audio channels using my sound card. I was wondering if I offset/change the phase of the signals in a certain way could I simulate an AC signal. I know the circuit programs Spice and Multisim can due this within the compnter, but I would like to create an AC TYPE signal using my sound card if possible...trying to keep it cheap.
If you are outputting any tones, other than just a click, from your sound card, you already have AC signals. When you say "different frequency signals", those are AC (other than a frequency of zero Hertz, which is DC).
You also wrote, "I know the circuit programs Spice and Multisim can due this within the compnter...". With Spice or Multisim, you typically set the parameters of the AC input signal you desire, then "stimulate" the circuit with that signal. Basically, these programs use math functions to simulate the reaction of the stimulated circuit. Alternatively, as in the case of an oscillator circuit, the program computes and displays the output based on the circuit components chosen. I don't believe these programs simulate AC signals from DC, unless you are talking the fact that digital computer circuitry eventually boils down to 1's and 0's.
Define what you mean by, "AC type signal". The sound you hear comming from your speakers is AC. Your sound card cannot or should not output DC voltages as speakers don't much care for DC current in the voice coil. Tell more about what you are trying to do..
Define what you mean by, "AC type signal". The sound you hear comming from your speakers is AC. Your sound card cannot or should not output DC voltages as speakers don't much care for DC current in the voice coil. Tell more about what you are trying to do..
Your sound card produces AC signals - that's what sound is, that's what the speakers need.
Am I missing something here? Are you meaning to say that you want to put a DC offset on the AC signal the sound card normally outputs? Or are you meaning to say you want to create a beat signal? Or mixer output (sum and difference signal)?
----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
formatting link
The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----
When I click on that link, the site gives me this error message:
"Patent not found. Please check the value you entered. Number not defined."
Do you just want to generate a single-frequency sine wave? Cool Edit
2000 does that, so probably Cool Edit Pro does as well.
Open the program, then: Click on "Generate" Select "Tones" In the "generate tones" window that appears: Click on "A 440 (default)" in the "presets" section (to force all settings to generate a single frequency) Type in any audible frequency number next to "Base frequency" Click "OK", then play it.
First off, I'm guessing that by "AC" you mean "the waveform that comes out of the wall outlets", namely 60 Hz or 50 Hz. I suspect Cool Edit can do this easily. If not, my own DaqGen freeware can certainly do it, and further allow you to add all sorts of modulations, noise, and other imperfections if you want to simulate real-world problems.
The strict use of the term AC simply means Alternating Current, and doesn't imply a certain frequency. Sound cards *only* put out AC, and can pretty much put out anything up to half the selected sample rate on the high frequency end. But on the low frequency end, they are limited to a few Hz minimum (the minimum may be as high as 20 Hz or more on some older cards). That's because there are DC blocking capacitors in the output (and input) lines. Since they are designed for audible sound, and since you can't hear much below 20 Hz anyway (and since this makes it *way* simpler/cheaper to design) this is no big deal for most uses.
Let me know if you have any questions about your specific simulation using DaqGen... there are a *lot* of controls, which might be intimidating at first. But a simple 60 Hz sine should be a piece of cake.
Best regards,
Bob Masta dqatechATdaqartaDOTcom D A Q A R T A Data AcQuisition And Real-Time Analysis
You can use the generate -> tones to create ac signals or you cold just record silence and zoom in to the maximum and then you can manually alter the "dc" waveform with the mouse to create any desired signal. Hope this helps.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.