[minima] Re: Stuck in Transmit
- From: Thomas Sarlandie <thomas@xxxxxxxxxxxxx>
- To: "minima@xxxxxxxxxxxxx" <minima@xxxxxxxxxxxxx>
- Date: Fri, 28 Feb 2014 00:49:56 -0800
Jerry,
If you keep just the PTT switch connected to pin 5, do you see the minima
going from RX (default) to TX (when you press the button)?
How is the relay when Q23 4.7k resistor is unplugged? It should be in RX.
You say nothing happens when you connect it to +5V. Then the relay is
always in RX and never goes to TX? I am confused because before you said
that you were stuck in transmit.
73,
thomas
On Fri, Feb 28, 2014 at 12:42 AM, <jerry@xxxxxxxxxxxxxxxx> wrote:
> With everything disconnected except the pullup the voltage on pin 5 is
> 4.94v. With the pullup removed it's 4.82v. Connecting 5v to the r/t pin
> does not activate the relay. Connecting 5v to a 4.7k and touching the
> base of Q23 doesn't operate the relay either. Maybe a bad relay? Jerry
>
> K5LRU
> Harwood, Texas
>
> > -------- Original Message --------
> > Subject: [minima] Re: Stuck in Transmit
> > From: Mark G0MGX <mark.g0mgx@xxxxxxxxx>
> > Date: Fri, February 28, 2014 2:31 am
> > To: minima@xxxxxxxxxxxxx
> >
> >
> > "The voltage on pin 5 is 2.24" - that's the problem. We need to
> understand why. The Arduio will see that as a LOW (because its less than
> 2.5) and hence you are in TX.
> >
> > If you disconnect everything from pin 5 except your 10K pull up to +5V
> what happens then? What is the voltage on pin 5? When you remove the pull
> up resistor whats the voltage then on pin 5?
> >
> > With the line to pin 5 disconnected if you apply 5V to the 4K7 to the
> base of Q23 does the relay operate?
> >
> > Mark
> >
> > On 28/02/2014 08:06, jerry@xxxxxxxxxxxxxxxx wrote:
> > > Thanks for your help Mark. The software is displaying transmit and it
> is
> > > in transmit. The base of Q23 is .652. The voltage on pin 5 is 2.24 and
> > > when I push the PTT it goes to 0. Jerry
> > >
> > > K5LRU
> > > Harwood, Texas
> > >
> > >> -------- Original Message --------
> > >> Subject: [minima] Re: Stuck in Transmit
> > >> From: Mark G0MGX <mark.g0mgx@xxxxxxxxx>
> > >> Date: Fri, February 28, 2014 1:55 am
> > >> To: minima@xxxxxxxxxxxxx
> > >>
> > >>
> > >> So is the software displaying TX and the relay in TX also or just one
> of
> > >> those?
> > >>
> > >> What is the voltage on the base of Q23 now? What's the voltage on pin
> 5?
> > >> How do these change when you press the PTT?
> > >>
> > >> If the software is displaying TX then the pin 5 is being pulled LOW
> > >> externally. If the software is in RX but the relay in TX (this was my
> > >> problem) then it's just a level / voltage problem. If you physically
> > >> connect the base of Q23 via 4K7 to +5 does the relay work?
> > >>
> > >> If you explain (probably again - sorry) exactly what the scenario is
> > >> then I will try and help you debug it.
> > >>
> > >> M
> > >>
> > >>
> > >> On 28/02/2014 07:37, jerry@xxxxxxxxxxxxxxxx wrote:
> > >>> Ok, I just put the 10k between the 5v pin on the digital board to
> pin 5
> > >>> on the digital board, still in transmit. Jerry
> > >>>
> > >>> K5LRU
> > >>> Harwood, Texas
> > >>>
> > >>>> -------- Original Message --------
> > >>>> Subject: [minima] Re: Stuck in Transmit
> > >>>> From: Mark G0MGX <mark.g0mgx@xxxxxxxxx>
> > >>>> Date: Fri, February 28, 2014 1:29 am
> > >>>> To: minima@xxxxxxxxxxxxx
> > >>>>
> > >>>>
> > >>>> That's not a pull-up that's a pull-down. The PTT switch will pull
> the
> > >>>> line to ground, I can't find the post but I think we said you
> needed to
> > >>>> pull high normally and then use the PTT switch to pull low when
> pressed.
> > >>>>
> > >>>> When in RX the line should be HIGH so if you have put a 10K to
> ground
> > >>>> that will pull it LOW.
> > >>>>
> > >>>> Your 10K needs to be from pin 5 to the 5V line.
> > >>>>
> > >>>> M
> > >>>>
> > >>>>
> > >>>> On 28/02/2014 07:25, jerry@xxxxxxxxxxxxxxxx wrote:
> > >>>>> 4.7k and added a 10k pullup resister
> > >>>>> from pin 5 on the micro to ground
>
>
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