Smallest Open-Source Function Generator

At the heart of this function generator is the Arduino, which acts as the central processing unit and user interface manager. When you interact with the physical potentiometer, the Arduino reads the analog voltage change to determine user parameters like frequency or waveform type. It then communicates configuration data to the AD9833 chip. The AD9833 is a specialized programmable waveform generator capable of producing high-precision sine, square, and triangle waves digitally. Once the AD9833 synthesizes the requested signal, the output is routed for external probing while simultaneously, the Arduino updates the OLED display via graphics libraries to provide visual feedback of the current settings. The entire electronics assembly is housed within a custom enclosure featuring an acrylic glass window to protect the screen and internal wiring, while the USB port supplies power and allows for reprogramming using the Arduino IDE.