MIcrowavers Audio Keyer
At the end of last year readers will recall the audio tone CW keyer and chirp generators http://g4jnt.com/MicrowaversAudioKeyer.pdf of which I supplied quite an appreciable number of programmed chips + PCB
An updated version KEYER5 now combines the capabilities of both - simply programme in a blank message to inhibit the prestored CW message and send three sequential tones instead.
I still have PCBs and PICs
go to http://g4jnt.com/BcnKeyer.htm to get your.
All additional components - with the exception of the SOT23 voltage regulator (which isn't essential anyway if you can run it from 2.5 to 5.5V) are available from the Chipbank