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 PIC 18F4550 400MHZ LCD Frequency Counter

 FC3: 50/500MHZ PIC18F4550 Counter & RF Meter


Project by:

Antonio Alfinito / I2TZK

Frank Dziurda / K7SFN 

Dinesh Gajjar / VU2FD

REV FC3-0314

Last version FC3-0812 is here.........


FC3-0314 PCB changes: (Changes from 0812 Board)
1. Q2=ERA3SM/SGA3486
2. Removed RJ45 Connector
3. Replaced 2X0.22uF by 0.47uF
4. LM385-2.5V at U2


FC3-0314 : Frequency Counter cum RF Meter project detailed here is based on PIC18F4550 

Interesting features of this project:

1. Its USB and DC12V Powered

2. Measures RF Level using AD8307

3. Count frequency to 50MHZ and 500MHZ

4. 2 x 16 LCD Display with BL

5. Signal Level measurement in dbm, vpp and rms

6. 50 ohms input impedance for both ranges

7. Frequency "off-sets" set by PC program.

8. Free PIC Firmware & PC WIN Software by Tony/I2TZK

Counter is designed on a double sided PTH Board and works on USB or external DC12V power. 

Fc3 is designed and developed for Radio Amateurs looking for economical frequency counter for their hobby work and wish to measure RF signal Level at the same time. 

Analog Device's AD8307 is used to measure RF level very accurately in DBm, Vpp or RMS. 

Counter works with PC or as a Stand-alone. PC Connection is auto detected and so is stand-alone mode.

Front panel push buttons are provided for RF Meter Mode and HF to VHF Frequency measurement modes.

A PC program is specially designed for FC3 by Tony/I2TZK is provided for configuration of IF Off-sets and AD8307 related parameter configuration thru USB interface.

FC3 Complete KIT uses (and Includes) AD8307, ADA4789 and MC12080 in SMT package and are supplied pre-soldered on PCB for those who do not like to solder these tiny devices. Assembled FC3 may also be available but buyer need to calibrate RF Measurement using PC software.

Kits and assembled FC3 are available. Only use Standard Osc provided with kits. Do not use TCXO in place of supplied Osc as the TCXO is not yet tested by me. 

Completed Frequency Counter: FC3-0314

Click the picture to enlarge


FC3-0314 Another View:  

Click the picture to enlarge

LCD HF/VHF Mode and RF Meter LCD Menu:
HF 1S Gate Mode
HF 10S Gate Mode
VHF (100 to 500MHZ) Divide by 10 MODE
2MTR Signal Measurement:
 FC3-0314 Schematic & Documents:
FC3-0314  50/500MHZ Frequency Counter Document
FC3-0314 Schematic & Parts List  
FC3 User Guide  
FC3-0314 Schematic Part A JPG
    Part B JPG
 PC Config Software
FC3 PC Software and PIC18F4550 hex by Tony / I2TZK V2.04
 Visit I2TZK Web Site
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FC3-0314: 50/500MHZ LCD Frequency Counter and RF Meter Assembled 

Being Revised
Parts List for FC3-0314
Includes AD8307 and all other parts listed in above parts list




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