VFO and BFO with Si5351A, OLED and Arduino

By PU2CLR - Ricardo Lima Caratti - March 18th, 2019

Português: Gerador de Sinal com Si5341, OLED e Arduino. Este projeto é sobre a construção de um VFO (530KHz to 160MHz) e um BFO (452KHz to 458KHz). Para mais detalhes consulte a documentação em Português.

English: Signal Generetor with Si5351, OLED and Arduino. This project is about a construction of a VFO (530KHz to 160MHz) and a BFO (452KHz to 458KHz or another range). See documentation here.

Table of contents

1. Introduction
2. Arduino ATmega32U4
3. BFO interface
   1. VFO and BFO and Dial information
4. Band table for the VFO
5. Schematic
6. Components
7. Arduino sketch
   1. BFO range
   2. Arduino pins and Encoder, Band, Step and Switch VFO/BFO
   3. Bands and frequency ranges
   4. External interrupts
   5. Changing the kind of display device
   6. SI5351 Calibration
8. Photos
9. Expetiments and Applications
   1. The BFO and VFO impplemented on Atmega328 (without use of external interruptions)
   2. IR Remote Control Implemetation for the VFO and BFO (Atmega328)
   3. VFO and BFO project with a inexpencive radio based on CD2003GP
10. References
11. Videos

Photo

Short links

• Click here to see the video about this project.
• Click here for documentation
• Click here to see Arduino Sketch

About the author

I studied for four years Electrical Engineering at the University of Fortaleza, Ceará, Brazil, but I ended up majoring in IT area at UPIS, Brasília, Brazil. In 2007 I got post-graduate degree in Distributed Systems at University of Brasilia (UNB). From 1985 to 1998, I worked as a Developer using C/C++, FORTRAN and ALGOL Programming Languages at Federal University of Ceara (Universidade Federal do Ceará). From 1998 to 2010 I worked as a database administrator in several companies. Currently working as an independent consultant in the field of Information Technology. In 2009 I wrote the book "Joomla! Avançado" (translated to English could be Advanced Joomla!); In 2012, after almost 30 years far from electronics, I returned to my old hobby and also got my amateur radio license.