Re-installing a TouchTone keypad in an ASR-33
ard at p850ug1.demon.co.uk
Sun May 17 12:41:53 CDT 2009
> On 16 May 2009 at 20:17, Ethan Dicks wrote:
> > ... and the schematic...
> > http://www.porticus.org/bell/images/35_dial.gif
> One of my favorite schematics! Generating DTMF with a single
> transistor. ISTR that the 113 modem was equally sparse in active
Yes, it's pretty clever...
> devices, but I can't find a schematic anywhere.
THis is mildly OT, but does anyone know of a source of the schematic for
the computer-interfaced autodialler (is that a model 108???) with an
RS336 interface from about that time? Finding the actual unit would be
even better, but I suspect that's impossible over here.
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