Whether you're using homebrew, QRP, boat anchor or any rig that doesn't have a computer interface, you can still have the advantage of computer logging. All you need to do is add a Digital Frequency Display that has a serial data port.

Neil Heckt of Almost All Digital Electronics has developed such a display and I have developed a mod to Neil's software that allows data output to a serial port. This has been described in a "Hints and Kinks" article in QST magazine. Click here to view a re-print of the article. Neil has four versions of his display but my code only works with his model DFD1.

In addition to the modified software you will need a TTL to EIA-232 converter with most computers. I built one on a small board that mounts conveniently on the back of Neil's board. Another approach would be to mount the converter in a separate box.

-A TTL- RS232 Converter for the serial out DFD-

-PC Board layout and etching pattern-
Download etching pattern as an exact size bit-mapped file Download as Protel Easytrax(DFDSIO.PCB) format.

-Digital Frequency Display Schematic-
Download schematics

If you would like to "burn" your own PIC you can-

I can supply pre-programmed PICs Please specify baud rate-1200 -19200.