VFO-001
Contents
Features
- SDD1306 OLED Display
- I2C Interface
- OLED runs from 3.3V (can run from 5V but this use has 3.3V)
- Rotary Encoder Break Out Board
- STM32 (Blue Pill Board) Microprocessor
- Arduino compatible
- 3.3V
- Replaced BOOT 0,1 jumpers
- Wire jumper on BOOT1
- Switch on BOOT0 - easier to download code
- Programmed via Arduino IDE
- Download via serial
- Si5351 Oscillator Breakout Board
- 10 KHz - 40 MHz tuning range
- 100Hz/1KHz/10KHz/100KHz/1MHz/10MHz steps
- I2C Interface
- 3 Outputs
- 27 MHz crystal
- 3.3V operation works without level shifters for I2C*
- Si5351 can only run from 3.3V
- Used right angle headers and Dupont cables for low profile
- 10 KHz - 40 MHz tuning range
- Extruded Aluminum Enclosure Box - 94mm x 83mm x 30mm - Out of stock
Schematic
Parts for Reference
Blue Pill Card
Build
- Extruded Aluminum Enclosure Box - 94mm x 83mm x 30mm - Out of stock
- BNC/Power Jack placement
- Rear panel BNCs and power jack
- Drill holes and nibble out for OLED cutout
- A bit rough
- Better to undercut nibble and file to size
- OLED fitted
Libraries/Example Code
Land Boards Code
Libraries used in this app
- U8g2: Library for monochrome displays, version 2
- Si5351 Library for Arduino
- Rotary Encoder - Software debounced
Other Si5351 Libraries
- Universal Digital VFO Si570/Si5351
- Adafruit_Si5351
- Si5351 Library for avr-gcc
- vk3hn_VFO_controller
- Simple BFO with si5351 controlled by Arduino
- VFO and BFO with Si5351A, OLED and Arduino
Videos
