CW K Pip Tone Unit
- This is an add on for anyone who wants an automatic CW \"K\" PIP tone after each over.
AVR Butterfly Keyer
- The Atmel AVR Butterfly is a credit card sized board which contains an AVR MEGA169 processor, a six character LCD display, a five way joystick navigation switch, a piezo speaker, a 3 volt lithium battery cell for power and a few other odds and ends.
FT290 CW KOX Circuit
- This is not actually break-in but just KOX circuit.
It can only be used on the CW mode otherwise it keys up the Tx