ARDUINO M571 AD9850 DDS Signal Generator Module 0-40MHz 2 Sine Wave 2 Square Wave Output Security Circuit and Motion Detector Electronic Hobby Kit

2 sine wave and 2 square wave output.After the 20-30MHz frequency harmonics increases, the waveform will be less and less clean.Square Wave: 0-1MHz.Low-pass filter with 70MHz, so the waveform better than SN.