Another DIY function generator using PIC16F628




An extremely simple and low cost Sine/Square wave generator 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 is a Microchip PIC16F628. There is no wiring, and the PCB fits into a standard UB3 Jiffy Box.

DDS Freq Gen

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




Current Project / Post can also be found using:

  • reddit DIY microcontroller watch

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