The ZEFI (Dutch: Zeer eenvoudige frequentie indicator) is a simple frequency indicator using a PIC 16C84 microcontroller for determining VFO frequency, correct for IF, and display the
last two digits of the frequency in kHz using 8 LED's
arranged as follows:
50 o o 5 40 o o 4 20 o o 2 10 o o 1
After trying out the circuit and program on a breadboard, I built the ZEFI into my NORCAL Cascade 80/20m SSB transceiver. The front panel has ample room for the eight LED's. I built the ZEFI on a small piece of veroboard in a small PCB box to screen microcontroller noise.
I have prepared two zip files, each containing the PIC source code and a ready to load hex file:
a version for the 16C84
and one for the 16F84
If you have comments, please let me know. (email address is on my home-page)
Thank you !