Arduino Nano Signal Generator kit (AD9833, 1.3 inch OLED display, Nano optional) | eBay
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
DIY Arduino Waveform Generator or Function Generator
Technoblogy - Tiny Function Generator
Portable Function Generator on Arduino : 7 Steps (with Pictures) - Instructables
1Hz to 30KHz Wave Generator Using Arduino - Electronics-Lab.com
Building a Simple Function Generator with an Arduino
Arduino – Si5351 Powered Signal Generator | WB8NBS