Dec 26, 2020 · LCD connections for for the LinkSprite 16 X 2 LCD Keypad Shield for Arduino. Change as necessary for your LCD. IF frequency is positive for sum product (IF = RF + LO) and negative for diff (IF = RF - LO)

Dec 11, 2016 · Here is a Simple vfo+bfo using Si5351 and a 16X2 lcd with an S-meter. It is based on atmega328 as a controller. The connections for LCD, Si5351 and AVR are explained in may previous post at "A Simple Si5351 based vfo (signal generator) for ham radio use [quick start-setting up and general details]"

10kHz to 225MHz VFO/RF Generator with Si5351 - Version 2 For use in DIY homebrew radio equipment such superheterodyne single/double conversion receiver, SDR, HAM QRP transceivers or RF generator. Feb 28, 2021

Jun 1, 2023 · The VFO frequency ranges from 5.5 MHz to 4.9 MHz to generate a 2nd and final IF frequency of 3.395 MHz. So, for the 40m band, you should set "frequency" (line 54) to 7 MHz and "iffreq" (line 57) to 12.5 MHz, and you MUST change the frequency calculation formula everywhere the SI5351 frequency is set from (frequency + iffreq) to (iffreq ...

Jan 16, 2025 · Cheap and easy-to-build VFO device that is almost indispensable in radio engineering, especially in DIY radio receivers.

**** Please scroll down for the Arduino version! This VFO is based on the popular Si5351. It consists of two parts: the controller board and the Si5351 board. Both designed by Joris (KTH rf-Design). The control board is using a PIC16F1825 and the popular OLED SSD1306 display.

May 7, 2024 · VFO program for Si5351: Using I2C LCD from: http://www.amazon.com/Huhushop-TM-Serial-Display-Arduino/dp/B00JM88A94/ Si5351 library from NT7S. Uses the updated version of the library (master). Display library is avaible from: https://code.google.com/p/u8glib/ UNO and 328 boards: Encoder on pin 2 and 3. Center pin to GND. Leonardo: Encoder on pin ...

This Arduino code provides a complete implementation of a Si5351 DDS (Direct Digital Synthesis) with VFO (Variable Frequency Oscillator), BFO (Beat Frequency Oscillator), rotary encoder, I2C communication, LCD 1602 display, frequency display, frequency step, frequency dial, BFO calibration, and S-meter.

10kHz to 120MHz VFO / RF Generator with Si5351 and Arduino. This is a project of a VFO (variable frequency oscillator) for use in homebrew equipement such as Direct Conversion and Superheterodyne Receivers or Ham Transmitters. Can be used as RF/Clock generator too. Operation range from 10kHz to 120MHz.

CPU: Arduino ProMini PLL: Si5351 or/and Si570 Display: OLED 0.91" 128x32, OLED 0.96" 128x64, OLED 1.3" 128/132x64, I2C LCD 1602, MAX7219 Encoder: optical/mechanic rotary encode Keypad: 0..6 buttons Support different TRX architecture: Single IF superheterodyne. Direct conversion with 2x or 4x output. Direct conversion with quadrature output.