code : /* ————————————————————————- *  * Name   : ADF4351 Controled Board 35Mhz-4.4Ghz with 10Mhz OCXO Reference  * Author : Stéphane HELAIEM – F4IRX  * Date   : july 12, 2025  * Purpose: ADF 4351 Synth  * Versions:  *    1.0  : ARDUINO NANO    *    1.1a : Change to ESP32 C3 ( 3.3v…

ref : https://github.com/Ryushane/ADF4351-ESP32 https://github.com/dfannin/adf4351 code test : #include « ADF4351.h » #include <SPI.h> #define clock 4 #define data 6 #define LE 7 #define CE 10 ADF4351 adf4351(clock,data,LE,CE); // declares object PLL of type ADF4351 void setup() {   Serial.begin(115200);   adf4351.begin();   // ref =25Mhz freq :41Mhz   adf4351.WriteRegister(0x00580005); //  R5   adf4351.WriteRegister(0xEC81FC); // R4   adf4351.WriteRegister(0x000004B3);…

Ref : https://github.com/f4goh/pico_vband schema Code // SPDX-License-Identifier: MIT // // VBAND CW USB dongle based on a Pi Pico. // Also supports other key outputs for Vail and morsecode.me etc. // // Inspired from similar projects at: // https://github.com/sipsmi/vband_dongle/tree/main // https://github.com/mgiugliano/MorsePaddle2USB // https://github.com/nealey/vail-adapter // // There is also a PiPico circuit python implementation shown on…

Reference : https://blog.networkprofile.org/gps-backed-local-ntp-server/https://austinsnerdythings.com/2021/04/19/microsecond-accurate-ntp-with-a-raspberry-pi-and-pps-gps/ Commande : sudo apt updatesudo apt upgrade -ysudo raspi-config ( serial port enabled ) sudo apt install gpsdsudo apt install gpsd-clientssudo apt install pps-toolssudo apt install chrony sudo bash -c « echo ‘# the next 3 lines are for GPS PPS signals’ >> /boot/config.txt »sudo bash -c « echo ‘dtoverlay=pps-gpio,gpiopin=18’ >> /boot/config.txt »sudo bash -c « echo…