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[aprssig] Tracker serial port usage

scott at opentrac.org scott at opentrac.org
Tue Dec 21 14:42:12 UTC 2004


Probably wouldn't hurt, though the regulator is supposed to current limit.

I think pin 9 is defined as Ring Indicator, but you'd only see that used on
a modem.

Scott
N1VG

-----Original Message-----
From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org]On Behalf Of Kurt A. Freiberger
Sent: Tuesday, December 21, 2004 6:12 AM
To: TAPR APRS Mailing List
Subject: Re: [aprssig] Tracker serial port usage


Might I suggest putting a picofuse on that +5v pin on the 232 connector?
  It saves a LOT of grief when you plug in something that shorts pin 9
out....

Cheers,
Kurt


Jason Winningham wrote:
>
> On Dec 20, 2004, at 5:58 PM, Scott Miller wrote:
>
>> I'm thinking of modifying the OpenTracker design so that it provides the
>> 1-wire bus signal and possibly a +5v supply as well on the DB9 used
>> for the
>> serial port.  I'm curious if anyone knows of any other non-standard
>> uses of
>> these pins in the packet world that I should be aware of.
>
>
> I asked a similar question a couploe of weeks ago and got no answer.
> Google wasn't helpful, either.
>
> I chose to add the +5V I needed on pin 9, since it has no connection in
> a standard RS232 DB9 connection.  All other pins have signals assigned.
>
> -Jason
> kg4wsv
>
>
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--
Kurt Freiberger, WB5BBW   kurt at badgers-hill.net  Austin, TX

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