AD9833 DDS Waveform Generator

Generate any sine, triangle, or square wave from 0.1 Hz to over 12 MHz from a single chip — the same DDS engine inside every lab function generator and ham-radio VFO.

Difficulty: Breadboard. Estimated build time: about 35 minutes. Estimated parts cost: about US$11.80. 7-part bill of materials with live supplier pricing. A microcontroller-driven function generator built around a single Direct Digital Synthesis chip.