Goupchn Programmable DDS Signal Generator 60MHz Dual Channel Arbitrary Waveform Function Generator Frequency Meter Cell Phone Control Signal Source: Amazon.com: Industrial & Scientific
KIT DIY Generator Functii Semnal DDS cu Frecventa Triunghiulară - Magazin Electronice
Modul Generator de Semnal AD9833
Modul generator semnal dreptunghiular cu NE555, frecventa si factor de umplere reglabil