Eugene wrote:
>
> Hello
>
> I need scheme to control PTT(radio) with Sound Blaster through MPU401
> MIDI port and may be COM and LPT port's.
>
> Please help
> mail to me
>
> Eugene O Golovko e-mail: zofyzllg.tcisro@tbdsl.com
Hello Eugene,
what we are using here is a very simple setup that uses the audio AC
coming from your speaker output (or line out) to switch a transistor, in
my case a BSX21 which then switches the PTT to ground....simple but
effective (for 1200 baud that is!!).
You can find an example on the home page of the maintainer/author
Thomas Sailer at HTTP://www.ife.ee.ethz.ch/~sailer/pcf/ptt_circ/ptt.html
Good luck with the experiment
Richard
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