[GreenKeys] Computing The Speed Of CW

[hunybuny at eskimo.com]

GE OMs;

Well - this is off-topic - but I'm so impressed with some of the
questions that people have asked and received thorough responses
to that I'm going to give this a shot and see if anyone has any
suggestions.

I've written a program (in C) to take my incoming e-mail and
send it over the comm port to a code practice oscillator so I
can listen to it in morse code. :-)

Works fine at any speed I hard-code it for.

Now I want to be able to tell the program to send at a specific
speed in WPM but I've found that the speed difference
from 35-30-25-20-15-10 WPM is not linear when done using a
system clock interrupt. There must be some formula because of all
the transceivers that have keyers built in and show you the speed
on their LCD.

Here is a rough example of the speed -vs- the clock times. The higher
speeds may be off because the way I'm finding the clock speed is to
key "dits" on my rig's keyer and then changing the interrupt speed on
the computer until they match.

WPM  -  Clock time

10 - 110000
13 -  90000
15 -  85000
18 -  64000
20 -  50000
25 -  40000
30 -  30000

Any ideas?

UE,
W6ESE - tony
NNNNZCZC

-- 
Tony j. podrasky | Oh somewhere in this favored land the sun is
                  | shining bright. The band is playing somewhere,
                  | and somewhere hearts are light. And somewhere men
                  | are laughing, and somewhere children shout - but
                  | there is no joy in Mudville - Mighty Casey has
                  | "struck out"