[GreenKeys] Precise Baud Timing

[Steve]

Much easier to do in hardware with just a few chips.
555 timer and shift register. A couple more chips and
send R-Y test. You can use a scope or period counter to
accurately setup the 555 clock. Can be implemented in Baudot
or ASCII.

With a uP, use the programmable timer which in most these
days is internal. This should be largely independent of the
code if done right.

Projects like this are fun...enjoy!
Steve W6SSP
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