It’s not a matter of trimming away VDC. His circuit is there to be able to add a VDC to the signal, to be able to shift it up or down as desired. The soundcard won’t give you anything that is ...

Signal generators are a useful piece of kit to have ... It’s an ugly Windows interface that’s a pain to use. The good news is that [wd5gnr] reverse engineered the protocol so you don ...

Signal-generator circuits produce RF sine-wave (or other waveform) output for purposes of testing, troubleshooting, and alignment. Although the subject of designing top-notch signal generator circuits ...