DDS sine signal generator for AM modulation from 1 Hz to 40 MHz with an AD9850 or AD9851, an ATmega328, and an Arduino firmware | Electronics and Mechanics for Hobbyists
Signal Generator
How to build an Arduino Signal Generator | Pokit Innovations
Waveform Generator using Arduino - YouTube
Arduino Nano Signal Generator kit (AD9833, 1.3 inch OLED display, Nano optional) | eBay