[arm-allstar] RGB LED RPI

[Sam Eichold]

I actually have built this using a relay board and the gpio pins.

I use it mainly for fan control, but I have the second relay indicating tx.

I've been meaning to submit the details to the wider group... Will send
tonight.


Sam

K4SOF

On Oct 8, 2017 1:27 PM, Doug Crompton via arm-allstar <
arm-allstar at hamvoip.org> wrote:

> Tom,
>
>  You did not say what you want the LED to indicate but I suspect that the
> node is transmitting and receiving?  There are no pins on the RPI that
> indicate TX/RX status. TXD and RXD are serial port pins that send digital
> data. All pins on the Pi are 3.3V max also.
>
> The PTT indication is available on the USB FOB. Most FOBS have an LED
> indicating this. If not the PTT line could be used as a pull down for an
> LED wired to +5V through an appropriate resistor.
>
> For RX the COS signal can be programmed to raise or lower an unused bit on
> the FOB - see the txctcss howto on the hamvoip web page. You also could do
> this with hardware and build a little circuitry to use the COS line to turn
> on the LED. This could need to be inverted depending on how your radio uses
> the COS line.
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
>
>
>
> On Sun, Oct 8, 2017 at 2:15 PM, "TomXtal via arm-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
> > I have build a Allstar node with RPI 3 which works just fine. What I
> would
> > like to do is have a status LED using a RBG LED, I would like to know
> which
> > GPIO pins to use. I know i can use pin 2 or 4 for power no but do not
> know
> > which pins for TX and RX maybe pin 8 (TXD) and pin 10 (RXD). So I need
> some
> > advice.
> >
> > Tom
> > _______________________________________________
> >
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> > arm-allstar at hamvoip.org
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> >
> > Visit the BBB and RPi2/3 web page - http://hamvoip.org
> >
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>
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>