[minima] Re: Stuck in Transmit
- From: <jerry@xxxxxxxxxxxxxxxx>
- To: minima@xxxxxxxxxxxxx
- Date: Fri, 28 Feb 2014 01:57:43 -0700
Yes, the PTT toggles it between RX and TX. When I disconnect the R/T
line from the digital board it changes the display to RX. When I
connect it to the mainboard it goes to TX. The relay stays in TX no
matter what is connected. Jerry
K5LRU
Harwood, Texas
> -------- Original Message --------
> Subject: [minima] Re: Stuck in Transmit
> From: Thomas Sarlandie <thomas@xxxxxxxxxxxxx>
> Date: Fri, February 28, 2014 2:49 am
> To: "minima@xxxxxxxxxxxxx" <minima@xxxxxxxxxxxxx>
>
>
> 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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