Onyehn XR2206 High Precision Function Signal Generator DIY Kit Sine/Triangle/Square Output 1Hz-1MHz Adjustable Frequency Amplitude + Transparent Case Box: Amazon.com: Industrial & Scientific
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AbodyMAX038 Signal Generator DIY Kit 1Hz~20MHz Function Generator High-speed -amp Generator Sine/Triangle/Rectangular/Sawtooth - Walmart.com
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Treedix XR2206 Signal Generator DIY Kit Sine/Triangle/Square Output 1Hz-1MHz Adjustable Frequency High Precision Function Signal Generator with Acrylic Case: Amazon.com: Industrial & Scientific
DIY AD9833 signal generator - first steps (part 1) - Daumemo
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