10KHz to 120MHz VFO / RF generator with Si5351 and Arduino

VFO / RF generator for homemade radio, such as direct conversion and superheterodyne receivers or HAM transmitters. Hardware components: Arduino nano r3 × 1 Adafruit SSD1306 128X64 OLED Display × 1 Adafruit Si5351 Clock Generation Module × 1 Rotary Encoder with Button × 1 Dial switch, dial × 1 RCA jack × 1 for radio frequency output selected Capacitor 100 nf × 2 Capacitor 10 μF × 1 Capacitor 10 nf × 2 Bread board (universal) × 1 Software applications and online services: Arduino IDE 10kHz to 120MHz VFO / RF generator with Si5351 and Arduino This is a project of the VFO (Variable Oscillator) for homemade devices, such as direct conversion and superheterodyne receivers or HAM transmitters. It can also be used as a RF / clock generator. feature: The operating range is 10kHz to 120MHz. Tun harmony of 1Hz, 10Hz, 1kHz, 5kHz, 10kHz and 1 MHz. The intermediate frequency (IF) offset (+ or -) is adjustable. Used as a homemade super-pendor or direct conversion of a local oscillator on a radio receiver. VFO used as a HAM radio transmitter. Used as a simple RF / clock generator for calibrating references or clock generation. It can be used with Arduino Uno, NANO and Pro Mini. Use a universal 128x64 I2C OLED SSD1306 display and Si5351 module. I2C data transmission, only 2 lines of display / Si5351 and Arduino. High stability and accuracy of frequency generated. Simple but very efficient and free. display image: Run VFO: Schematic / wiring: instruction: Open Scketch on Arduino ID, install all required libraries. Select Preferences (see Note) and compile the sketch and load it to Arduino Nano, UNO, or Pro Mini. Connect the Arduino, Display, Si5351 modules, rotary encoders, and the like according to the schematic diagram. Open Arduino's power. Rotating the rotary encoder to adjust or lower the frequency. Press the encoder button to change the frequency step tune. The available steps are 1 Hz, 10Hz, 1kHz, 5kHz, 10kHz and 1 MHz.

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