![]() Searching the internet, I found that it is actually a feature of sound card, by which it can eliminate any DC offset before the signal comes out. Then I tried with MATLAB by writing a function to generate sine wave with DC offset, but still no help (read towards end of page to generate signals with MATLAB). Searching the audacity menu, I could not find an option to add DC offset. In other words, I needed signal with DC offset added to it. That was not a good news for me as most of my signals are interfaced to micro controllers, which accepts inputs from 0V and positive. That means, the output had both positive and negative half cycle. The output from my PC had good fidelity for frequency, but the output was centered around GND level (0V). I observed the output from my PC by connecting the oscilloscope on the headphone output (audio jack). Just select the frequency you need and then PC generates the output (from the audio jack). Once you install the software, it has a menu to generate a "tone". I decided to go for the PC based function generator by generating the frequencies using the audacity software:. Simplest form of of PC based signal generator:. Cannot generate frequencies higher than 20KHz (or slightly higher). Might damage your Sound card (and/ or) PC if you do not understand the limits and do not understand what are you doing.Ģ. Use PC sound card, unless you listen to lot of music while working on electronics stuffs.ĭisadvantages of PC based signal generator: -ġ. Do not need to carry one more signal generator.Ħ. If you use a output buffer amplifier, the chances of damaging your PC sound card is very small. Easier to operate, because, most people who finds signal generator useful are well versed in computer software + hardware.Ĥ. Any function that you can write and understand its limits can be generated from PC.ģ. Can generate complex signals, like Sin(f1) + Sin(f2). Low cost, no need to spend lot of money (costs about Indian Rs.30 = US$0.67 = costs almost nothing).Ģ. Always thought of making your own PC based signal generator?Īdvantages of PC based signal generator: -ġ. ![]()
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