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OK...
This is ONLY a modem, not a TNC....
I have some design here (in attached file) BUT, i cant find 16C620 ( i need
10pcs)
So, take a look schematic and code and tell me, can i use 16c(f)84...
Or, if you would like to build a tnc that will be MUCH better solution...
About Z80....
It is cool TNC1 and TNC2 but, i need those AN7910 IC which is too much
expensive...So, again, back to PIC...
š

Andrew Kelley wrote:

> I would *except* that it is not built(or designed) yet.š It will use a 33
> MHz crystal on a 16f873 with a tone-to-voltage convertor.š The AFSK
> output will be a signal eminating from one of the pics outputs(a
> transister will provide the NEGATIVE keying).š If I read the tone
> convertor with an a/d input I will be able to tell whether it is 1200 Hz
> tone or 2200 Hz tone.š Just requires another EEPROM to store data(24C65).
> šThose packet headers can be large.
>
> Andrew
>
> On Fri, 17 Mar 2000 22:38:23 +0100 "Milan Pavlica (YU7AEC)"
> <mpavlica@PTT.YU> writes:
> > Would you share your schematic and/or PCB with me ???PSE???
> >
> > Andrew Kelley wrote:
> >
> > > gee I am/was gonna build one of my own designs....
> > >
> > > Andrew K.
> > > N1YEW
> > >
> > > On Sat, 6 Nov 1999 17:16:48 -0200 WF <wf@BLUSOFT.ORG.BR> writes:
> > > > Try RadioMetrics...
> > > >
> > > > Miguel
> > > > ----- Original Message -----
> > > > From: Milan Pavlica (YU7AEC) <mpavlica@PTT.YU>
> > > > To: <PICLIST@MITVMA.MIT.EDU>
> > > > Sent: Friday, March 17, 2000 5:57 PM
> > > > Subject: Packet radio problem
> > > >
> > > >
> > > > > Hi!Anybody have schematic for packet radio modem with some PIC
> > (it
> > > > will
> > > > > be nice with 16f(c)84)
> > > > > THANKS!
> > > > >
> > >
> > > ________________________________________________________________
> > > YOU'RE PAYING TOO MUCH FOR THE INTERNET!
> > > Juno now offers FREE Internet Access!
> > > Try it today - there's no risk!š For your FREE software, visit:
> > > http://dl.www.juno.com/get/tagj.
>
> ________________________________________________________________
> YOU'RE PAYING TOO MUCH FOR THE INTERNET!
> Juno now offers FREE Internet Access!
> Try it today - there's no risk!š For your FREE software, visit:
> http://dl.www.juno.com/get/tagj.

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