Zelscope is a Windows software that converts your PC into a dual-tracestorage oscilloscope and spectrum analyzer. It uses your computer'ssound card as analog-to-digital converter, presenting a real-timewaveform or spectrum of the signal - which can be music, speech, oroutput from an electronic circuit. Zelscope features the interface of atraditional oscilloscope, with conventional gain, offset, timebase, andtrigger controls. As a real-time spectrum analyzer, Zelscope candisplay the amplitude and phase components of the spectrum.
This article describes a simple way to interface the ADC0804 8-bitanalog-to-digital converter IC to the parallel port of anIBM-compatible PC. It largely superceeds my old page on how tointerface the (now obsolete) ZN448E.
大current 會唔會爆sound card 或成部機死
