Very Tiny Palmtop Vector Network Analyzer

This is a simple CW beacon project based on Arduino and Si5351 clock generator. It transmits a predefined message as morse code on a fixed frequency.

VFO for si5351, stm32 and ili9341 2.8" spi tft

Very minimalistic 20meter transceiver Digital Frequency Synthesizer with 0.96 or 1.3 inch 128x64 OLED Display for Ham-radio use

Library for the Si5351A (10 MSOP - 3 Clocks Only) clock generator IC in the Arduino environment , based on NT7S library.

Modified version of Si5351_OLED_DFS for simple CW TX use or DC receiver.

A quad output variable frequency oscillator

Tool for simulating digital modes

Demo program to use the Silabs Si5351A CMOS clock generator

Sets Si5351 CLK0 frequency from 100 MHz to 150 MHz using just 1446 bytes of program storage space on an ATTiny85. I made an effort to provide explicit references to the Si5351 Data Sheet and Application Note AN619 for all significant programming decisions and calculations.

Airband Scanner on an ATTiny85 using Si5351 and not much else!