[aprssig] Tracker serial port usage

Kurt A. Freiberger kurt at badgers-hill.net
Tue Dec 21 08:12:00 CST 2004

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 


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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