This is one cool software that very robotic engineer must have. All credits to Konstantin Zeldovich . Its working is quite simple,just connect the probe to your sound card and watch the wave on your monitor. Its an amazin oscilloscope for budding roboteers than buyin a 20Ghz oscilloscope for about 20K which you'l nerver be using that high frequencies.For most newbie application the range that it offers that's 20Hz – 20Khz is quite enough. it gives variable gains, XY mode. and then its so handy and comes in a small ZIP package.
Is this not enough to try this FREE software?? well then have a look at this
Trust me its awesome. Follow the link for downloading it above and make your personal oscilloscope in seconds.
P.S:- It comes along with a readme file and a 55kb help file.Just have look