555 Code Oscillator
This is the circuit diagram I use for a code oscillator used to teach adults at Community Living here in St Thomas the morse code. Along with Floyd VE3ONF and Terry VE3TEH, we have been practicing Morse Code there for a few years. They seem to enjoy it – none of them will ever be able to copy code faster than one word per each 5 minutes, if that, but they enjoy meeting with us and playing with the code once a week.
73, Al