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generating morse code
Michael J. Coslo wrote:
On Apr 14, 2:46 am, "D. Stussy" wrote: "David Griffith" wrote in message ... Does anyone here done something like sending ASCII to a microcontroller which then emits morse code? I'm tinkering around with old telegraph sounders. Yes. I re-wrote the firmware in my Icom repeater, which included the I D section too. Here's a webpage where a fellow has done something similar: http://www.steampunkworkshop.com/ It's on the right hand side of the page, a link called "telegraph sounder" http://www.steampunkworkshop.com/telegraph.shtml That's one of the first places I looked and where I got the idea. However, what he did was have a circuit watch the keyboard LEDs. What I'm trying to do is make something that attaches to an RS232 port. That way, I can run a three or four wire cable from a server in a back room to wherever I decide to put my sounder. There are two ways I could do this. The first is cheap and dirty. It works by energizing the sounder coils whenever RTS is asserted. That would require special program -- not too tough, but won't be as flexible as in the second approach. The other is to buffer RS232 in a microcontroller, convert to morse code, then tap out the message. In effect, this creates a one-way serial-to-telegraph modem. That second approach is what has me most interested. Suppose you have a server writing logs to a serial port... See the sort of bizzare fun that can be had? -- David Griffith --- Put my last name where it belongs |
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