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Re: Outputs

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  • dsay2001
    Let s try a different question then... What is the maximum voltage that can be applied to one of the output pins?
    Message 1 of 6 , Jul 3, 2013
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      Let's try a different question then...
      What is the maximum voltage that can be applied to one of the output pins?

      --- In irlp-embedded@yahoogroups.com, Don Sayler <don.sayler@...> wrote:
      >
      > Thanks David. Being primarily a software guy, I don't understand how to
      > use this info.
      >
      > I need to use the PTT/AUX1 outputs to switch an external 10V signal to our
      > repeater controller. I tried using a 5V relay, where the coil was
      > connected between the AUX3 output (measured at 4.8V) and PTT/AUX1.
      >
      > When I turn AUX1 on, I expected the relay to energize, but it didn't. I
      > did make sure that the relay worked by testing it with another 4.5V
      > source. What is the proper way to wire this? Do I even need the relay?
      > Can I use the FET to switch the 10V directly?
      >
      >
      > On Sun, Jun 30, 2013 at 7:20 PM, David Cameron (IRLP) <dcameron@...>wrote:
      >
      > > **
      > >
      > >
      > > http://www.irlp.net/new-install/Ver3_Wiring.pdf
      > >
      > > They are not open collector, as they have a 100K pull-up resistor to +5V.
      > >
      > > But they are FETs that go to ground. PTT, AUX1, AUX2, and AUX3 are all
      > > the same.
      > >
      > > They can handle up to 6A per fet, but the wire that feeds the DB-9 cable
      > > can only handle about 500mA.
      > >
      > > Dave Cameron
      > > VE7LTD
      > >
      > >
      > > On 6/30/2013 12:24 PM, dsay2001 wrote:
      > > > How do the outputs work? Are they Open Collector type, or ...? I looked
      > > through this board, and the Embedded Node docs, but couldn't find any
      > > details. Is there some documentation that I missed?
      > > >
      > > > Thanks.
      > > >
      > > >
      > >
      > >
      > >
      >
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