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[aprssig] Tracker serial port usage

Gerry Creager n5jxs gerry.creager at tamu.edu
Tue Dec 21 15:45:11 UTC 2004


Depends on the regulator.  And, having lit up a couple of regulators 
(yes, Virginia, lit, as in 'flames'), the picofuse is a very good idea.

gerry

scott at opentrac.org wrote:
> 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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> 
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-- 
Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University	
Cell: 979.229.5301 Office: 979.458.4020
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