VFO-001

Features

DD1306 OLED Display
- I2C Interface
Rotary Encoder
Blue Pill Microprocessor
- Arduino compatible
- 3.3V
Si5351 Oscillator
- 10/100/1KHz/10KHz/100KHz/1MHz steps
- I2C Interface
- 3 Outputs
- 27 MHz crystal
Extruded Aluminum Enclosure Box - 94mm x 83mm x 30mm

Schematic

Parts

Blue Pill Card

Blue Pill Card

3.3V operation works without level shifters for I2C
- OLED runs from 3.3V
- Si5351 can only run from 3.3V
Used right angle headers and Dupont cables for low profile
Replaced BOOT 0,1 jumpers
- Wire jumper on BOOT1
- Switch on BOOT0 - easier to download code
Download via serial
Programmed via Arduino IDE

128x32 OLED

Ebay

Arduino Library for OLED

U8g2: Library for monochrome displays, version 2
- Reference library
- Constructor

U8G2_SSD1306_128X32_UNIVISION_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);   // STM32, Ebay OLED

List of Fonts

  u8g2.setFont(u8g2_font_ncenB14_tr);

Hello World Code

U8G2_SSD1306_128X32_UNIVISION_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);   // STM32, Ebay OLED

void setup(void) {
  u8g2.begin();
}

void loop(void) {
  u8g2.clearBuffer();			// clear the internal memory
  u8g2.setFont(u8g2_font_ncenB08_tr);	// choose a suitable font
  u8g2.drawStr(0,10,"Hello World!");	// write something to the internal memory
  u8g2.sendBuffer();			// transfer internal memory to the display
  delay(1000);  
}