An Arduino Freq-Mite, by
Mike WA8BXN ... Here is an Arduino project I worked on to give
the functionality of a Freq-Mite (CW announcement of rig frequency).
Source code provided. Details provided for use with NC40A but could be
adapted to other rigs.
Adding a Keyer to the Arduino “Freq-Mite” for the NC40A,
Mike WA8BXN ...
Here is my Arduino project again, but this time adding a
simple memory keyer to the original "freq-mite" functionality.
Included is the original description as well.
Teensy-Si5351 Audio Signal Source,
by Jim WB8NBS ...
One of my winter projects is an Si5351 based signal
source. It has three channels each with a frequency range of 500
khz to 160 mhz, probably much more I have not checked its limits. I am
currently designing an audio frequency adapter that will divide the
frequency down to 2.5 hz to 25 khz range. That will use the MAX294
filter chip to produce a sine wave, inspired by Kieth Kunde K8KK's
article "Low Distortion Audio Oscillator" in January 2018 QST.