I have been following Pete's (N6QW) LBS version 2 transceiver progress, and decided to put my BITX project on hold until he gets his finished. I might just change over to some of his design instead of what I had been thinking of doing
A while ago I had purchased a small 40 Meter transceiver kit from e-bay. This is a crystal controlled direct conversion transceiver.
Frog Sounds Radio QRP Kit Telegraph CW Transceiver Receiver Radio Station V3
I was able to listen to the streaming of some of the speakers at FDIM and one of the things mentioned was converting this transceiver from crystal control to a VFO, thought I might as well give it a try myself.
I had done a VFO using an Adafruit SI5351 break out board, and decided this would work well for this project. Looking at the schematic of the board, it uses a SA612 as a crystal oscillator, and has a simple circuit to shift the frequency when going form transmit to receive. I will use two of the clock outputs of the si5351 instead of shifting the frequency in software when changing from R to T. This will also make it easier to implement RIT or Split operation.
Looking around for some Arduino CW keyer code. I think I might be able to use some of the add on code developed for the TenTec Rebel.I bread boarded a quick Arduino, SI5351, OLED display to see how it would work. Most of the code from my earlier VFO ported over to use the new display with very little effort.