I set up an Arduino as a cw/mcw keyer using an Arduino sketch published by Steven T. Elliott (openqrp.org/?p=343). To prevent input flutter, I had to use a couple of 10k pull-up resisters to maintain +5v on the inputs when not being keyed. The program produces 2 outputs, an audio out, and traditional +5v/0v out. For this MCW use, I connected the audio output to both a piezo-speaker and into the audio input of my SignaLink SL-1, which keys the radio. This keyer can also support normal, non-modulated CW via the non-modulated port.
I'm not using any sort of other keyer, either in the radio or on my paddles. The keyer is totally defined in software on the Arduino.
Негізгі бет Ғылым және технология Arduino based CW keyer
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