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Winscope (freeware)

Most people will not have access to a electronics laboratory or be able to afford an oscilloscope, so here is an alternative. Winscope is software that will use your sound card to sample input waveforms and display results on your computer monitor. In addition, winscope also has a storage facility and has a powerful FFT (fast fourier transform) routine, which enables winscope to act as a spectrum analyser.

Winscope 2.51 is designed by Konstantin Zeldovich and he has graciously distributed it as freeware. After downloading winscope, which comes as a .ZIP file unzip it and read the help file that is distributed with the program.