An extremely simple and low-cost Sine/Square wave generator, known as the “Custom Function Generator,” is developed based on the Analog Devices AD9835 Direct Digital Synthesis (DDS) Generator chip.. The frequency can be set for any frequency from 1Hz to 10MHz in 1Hz resolution steps! All this with three push buttons and a novel “sliding window” LED display. The controller chip, a Microchip PIC16F628, is programmed to facilitate various functions seamlessly. There is no wiring required, and the PCB snugly fits into a standard UB3 Jiffy Box, making it an ideal solution for a Custom Function Generator.
Read the complete Project Article in HTML format.
The Schematic Diagram in GIF format.
The Front Component Overlay in GIF format.
The Back Component Overlay in GIF format.
The Front Panel in ZIPed PDF format
The Front Panel in ZIPed EPS format
The PCB file in Protel format.
For more detail: Another DIY function generator using PIC16F628