The Arduino version is partly based on the original MultiFeaturedVFO software of Jason Mildrum, NT7S and Przemek Sadowski, SQ9NJE. The software has the same functionality as the PIC version. Then try again to calibrate.ĭue to the popularity of the Arduino, I rewrite the PIC software for using an Arduino-Nano. Note: If calibration will not succeed: You can reset the calibration by pressing the Calibration button twice without tuning. – Tune to the measured frequency and push again the calibration button – The frequency will be set to the X-tal frequency – RIT function (only the Rx frequency is tuned with 100 Hz step size) – Select and tune BFO/LO to any IF frequency – Output of 3 different frequencies (Tx, Rx, BFO/LO) on CLK0-CLK2 There are 3 clock outputs available having the following outputs:ĬLK0: Tx Output frequency from 1 – 125 MHz (same frequency as on the display).ĬLK1: First Rx LO calculated from CLK0 + or – CLK2.ĬLK2: Rx IF frequency. The software accepts both versions of the Si5351. The KTH-Si5351 board is using the Mouser Si5351 and a x-tal of 27 MHz, the Adafruit board is using a 25 MHz x-tal. The control board is using a PIC16F1825 and the popular OLED SSD1306 display.īecause there are two versions of the Si5351 with different I2C addresses and different x-tal frequencies, I made two versions of the software, for 25MHz and 27 MHz x-tal frequency.
It consists of two parts: the controller board and the Si5351 board. **** Please scroll down for the Arduino version! **** For control board schematic click here and for the Si5351 board click here. Downloads: Hex file for the 16F1825 click for 25MHz version or 27MHz version.
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