¿ªÔÆÌåÓý

Date

Newbie question

 

Hello folks,

can you confirm that transmitting sub audio tones will spoil the communication, at least at 9600 baud?
That's what I found and is probably well known.?

73 Giovanni IZ5PQT


Re: OM>(callsign)

 

That is indicating your radio heard a message not addressed to you (other message). There should be an aprs menu option for disabling other message pop-ups on the FT5.

73, Brent WG0A


OM>(callsign)

 

From time?to time I get a pop up on my FT5 from my direwolf igate/DiGi that has?
OM>(callsign)
It won¡¯t log to my station list or message list on the radio.

What is this?
Is there a way to filter this out either server or client side?


Re: resolution

 

I assume the attached pictures do not show the whole screen.
If that is the case, then I suspect the issue is on the VNCViewer side.
? Have you checked your settings on the computer you are connecting to the Pi with?
? Maybe even a simple expand the screen by dragging a corner.

What is the setup of the computer you are trying to view pi screen on?
particularly:
1. OS
2. VNC Viewer application
3. Screen resolution of the monitor in use

Second possibility is that you are not connecting to the main screen of the Pi

You still haven't provided details of the Pi you are connecting to either.
-------
Rob KB8RCO


Re: resolution

 

¿ªÔÆÌåÓý

Good evening to you,

I ran tvservice -o
and it doesn't work


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







Le 8 ao?t 2023 ¨¤ 21:11, Herbert Crosby <kd5pqj@...> a ¨¦crit :

I have a fix-video script that runs tvservice or vcgencmd as needed/pi0 vs pi3/4
Example: tvservice -o
For off...-p for preset see man pages
Example: vcgencmd display_power 1 2
? vcgencmd hdmi_status_show

And I use that screen configuration in the preferences that is turn off in menus
KD5PQJ Herbert?



Re: resolution

Herbert Crosby
 

I have a fix-video script that runs tvservice or vcgencmd as needed/pi0 vs pi3/4
Example: tvservice -o
For off...-p for preset see man pages
Example: vcgencmd display_power 1 2
? vcgencmd hdmi_status_show

And I use that screen configuration in the preferences that is turn off in menus
KD5PQJ Herbert?


Re: resolution

 

¿ªÔÆÌåÓý

Hi Robert,

even after my reboot
I still have a small screen




End reboot



Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







Le 8 ao?t 2023 ¨¤ 20:50, Rob Giuliano via groups.io <kb8rco@...> a ¨¦crit :

First, run
?? ~ $ cat /proc/version

it should display something like:
Linux version 6.1.21-v8+ (dom@buildbot) (aarch64-linux-gnu-gcc-8 (Ubuntu/Linaro 8.4.0-3ubuntu1) 8.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #1642 SMP PREEMPT Mon Apr? 3 17:24:16 BST 2023


Next try running
?? ~ $ sudo raspi-config
Can you see the full menu system that way?
If so, scroll down to?
?? #2 Display Options
then scroll down to D5 VNC resolution
?? Then pick a resolution that you like - I'd try 1920x1080 and rescale on the viewer side.


Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 07:59:40 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Good evening Robert,

Yes I can use SSH mode
here is what I got with it:

vncserver -geometry 1280x1024<Capture d¡¯e?cran, le 2023-08-08 a? 19.57.48.png>


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







Le 8 ao?t 2023 ¨¤ 19:05, Rob Giuliano via groups.io <kb8rco@...> a ¨¦crit :

Actually, your resolution is too low.? Low resolution (Horizontal pixels x vertical pixels) means a large screen only shows a

Can you SSH into your Pi?
If so, try restarting the VNCserver with resolution settings like:
? ?? vncserver -geometry 1280x1024

You don't say which viewer you are using?
?? I've used TightVNC viewer and RealVNC viewer with good luck.

Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 06:16:12 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Hello to you,

my resolution is too high, and I can't see and also change my resolution?
Here is a picture

<Capture d¡¯e?cran, le 2023-08-08 a? 18.13.43.png>


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







Le 8 ao?t 2023 ¨¤ 18:09, Rob Giuliano via groups.io <kb8rco@...> a ¨¦crit :

It is very hard to tell the actual resolution from a screen shot - since you can manipulate that very easily.

However, to answer your question - YES!
You can set the VNC resolution in your Raspberry Pi to a resolution even if there is no actual display connected.
With the newer versions of Raspberry Pi OS, you do it from them menu with
???? > Preferences >Raspberry Pi Configuration
????????? in the Display tab set the Headless Resolution value
For older version search on "Headless screen resolution" and you will get detailed instructions.

Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 05:22:15 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Hello everyone,

i am using VNC Viewer to direwolf which is on the mountain
and I have a bad screen resolution

is it possible to change the resolution to see the image of my raspberry pi which is on top of the mountain with VNC Viewer

I am attaching an image of my VNC Viewer
so that you can help me to correct the situation

thank you and good evening




<Capture d¡¯e?cran, le 2023-08-08 a? 17.00.41.png>


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







<Capture d¡¯e?cran, le 2023-08-08 a? 17.00.41.png>

<Capture d¡¯e?cran, le 2023-08-08 a? 18.13.43.png>

<Capture d¡¯e?cran, le 2023-08-08 a? 19.57.48.png>


Re: resolution

 

First, run
?? ~ $ cat /proc/version

it should display something like:
Linux version 6.1.21-v8+ (dom@buildbot) (aarch64-linux-gnu-gcc-8 (Ubuntu/Linaro 8.4.0-3ubuntu1) 8.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #1642 SMP PREEMPT Mon Apr? 3 17:24:16 BST 2023


Next try running
?? ~ $ sudo raspi-config
Can you see the full menu system that way?
If so, scroll down to?
?? #2 Display Options
then scroll down to D5 VNC resolution
?? Then pick a resolution that you like - I'd try 1920x1080 and rescale on the viewer side.


Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 07:59:40 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Good evening Robert,

Yes I can use SSH mode
here is what I got with it:

vncserver -geometry 1280x1024


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







Le 8 ao?t 2023 ¨¤ 19:05, Rob Giuliano via groups.io <kb8rco@...> a ¨¦crit :

Actually, your resolution is too low.? Low resolution (Horizontal pixels x vertical pixels) means a large screen only shows a

Can you SSH into your Pi?
If so, try restarting the VNCserver with resolution settings like:
? ?? vncserver -geometry 1280x1024

You don't say which viewer you are using?
?? I've used TightVNC viewer and RealVNC viewer with good luck.

Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 06:16:12 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Hello to you,

my resolution is too high, and I can't see and also change my resolution?
Here is a picture

<Capture d¡¯e?cran, le 2023-08-08 a? 18.13.43.png>


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







Le 8 ao?t 2023 ¨¤ 18:09, Rob Giuliano via groups.io <kb8rco@...> a ¨¦crit :

It is very hard to tell the actual resolution from a screen shot - since you can manipulate that very easily.

However, to answer your question - YES!
You can set the VNC resolution in your Raspberry Pi to a resolution even if there is no actual display connected.
With the newer versions of Raspberry Pi OS, you do it from them menu with
???? > Preferences >Raspberry Pi Configuration
????????? in the Display tab set the Headless Resolution value
For older version search on "Headless screen resolution" and you will get detailed instructions.

Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 05:22:15 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Hello everyone,

i am using VNC Viewer to direwolf which is on the mountain
and I have a bad screen resolution

is it possible to change the resolution to see the image of my raspberry pi which is on top of the mountain with VNC Viewer

I am attaching an image of my VNC Viewer
so that you can help me to correct the situation

thank you and good evening




<Capture d¡¯e?cran, le 2023-08-08 a? 17.00.41.png>


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







<Capture d¡¯e?cran, le 2023-08-08 a? 17.00.41.png>

<Capture d¡¯e?cran, le 2023-08-08 a? 18.13.43.png>


Re: resolution

 

¿ªÔÆÌåÓý

Good evening Robert,

Yes I can use SSH mode
here is what I got with it:

vncserver -geometry 1280x1024


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







Le 8 ao?t 2023 ¨¤ 19:05, Rob Giuliano via groups.io <kb8rco@...> a ¨¦crit :

Actually, your resolution is too low.? Low resolution (Horizontal pixels x vertical pixels) means a large screen only shows a

Can you SSH into your Pi?
If so, try restarting the VNCserver with resolution settings like:
? ?? vncserver -geometry 1280x1024

You don't say which viewer you are using?
?? I've used TightVNC viewer and RealVNC viewer with good luck.

Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 06:16:12 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Hello to you,

my resolution is too high, and I can't see and also change my resolution?
Here is a picture

<Capture d¡¯e?cran, le 2023-08-08 a? 18.13.43.png>


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







Le 8 ao?t 2023 ¨¤ 18:09, Rob Giuliano via groups.io <kb8rco@...> a ¨¦crit :

It is very hard to tell the actual resolution from a screen shot - since you can manipulate that very easily.

However, to answer your question - YES!
You can set the VNC resolution in your Raspberry Pi to a resolution even if there is no actual display connected.
With the newer versions of Raspberry Pi OS, you do it from them menu with
???? > Preferences >Raspberry Pi Configuration
????????? in the Display tab set the Headless Resolution value
For older version search on "Headless screen resolution" and you will get detailed instructions.

Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 05:22:15 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Hello everyone,

i am using VNC Viewer to direwolf which is on the mountain
and I have a bad screen resolution

is it possible to change the resolution to see the image of my raspberry pi which is on top of the mountain with VNC Viewer

I am attaching an image of my VNC Viewer
so that you can help me to correct the situation

thank you and good evening




<Capture d¡¯e?cran, le 2023-08-08 a? 17.00.41.png>


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







<Capture d¡¯e?cran, le 2023-08-08 a? 17.00.41.png>

<Capture d¡¯e?cran, le 2023-08-08 a? 18.13.43.png>


Re: resolution

 

Actually, your resolution is too low.? Low resolution (Horizontal pixels x vertical pixels) means a large screen only shows a

Can you SSH into your Pi?
If so, try restarting the VNCserver with resolution settings like:
? ?? vncserver -geometry 1280x1024

You don't say which viewer you are using?
?? I've used TightVNC viewer and RealVNC viewer with good luck.

Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 06:16:12 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Hello to you,

my resolution is too high, and I can't see and also change my resolution?
Here is a picture



Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







Le 8 ao?t 2023 ¨¤ 18:09, Rob Giuliano via groups.io <kb8rco@...> a ¨¦crit :

It is very hard to tell the actual resolution from a screen shot - since you can manipulate that very easily.

However, to answer your question - YES!
You can set the VNC resolution in your Raspberry Pi to a resolution even if there is no actual display connected.
With the newer versions of Raspberry Pi OS, you do it from them menu with
???? > Preferences >Raspberry Pi Configuration
????????? in the Display tab set the Headless Resolution value
For older version search on "Headless screen resolution" and you will get detailed instructions.

Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 05:22:15 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Hello everyone,

i am using VNC Viewer to direwolf which is on the mountain
and I have a bad screen resolution

is it possible to change the resolution to see the image of my raspberry pi which is on top of the mountain with VNC Viewer

I am attaching an image of my VNC Viewer
so that you can help me to correct the situation

thank you and good evening




<Capture d¡¯e?cran, le 2023-08-08 a? 17.00.41.png>


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







<Capture d¡¯e?cran, le 2023-08-08 a? 17.00.41.png>


Re: resolution

 

¿ªÔÆÌåÓý

Hello to you,

my resolution is too high, and I can't see and also change my resolution?
Here is a picture



Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







Le 8 ao?t 2023 ¨¤ 18:09, Rob Giuliano via groups.io <kb8rco@...> a ¨¦crit :

It is very hard to tell the actual resolution from a screen shot - since you can manipulate that very easily.

However, to answer your question - YES!
You can set the VNC resolution in your Raspberry Pi to a resolution even if there is no actual display connected.
With the newer versions of Raspberry Pi OS, you do it from them menu with
???? > Preferences >Raspberry Pi Configuration
????????? in the Display tab set the Headless Resolution value
For older version search on "Headless screen resolution" and you will get detailed instructions.

Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 05:22:15 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Hello everyone,

i am using VNC Viewer to direwolf which is on the mountain
and I have a bad screen resolution

is it possible to change the resolution to see the image of my raspberry pi which is on top of the mountain with VNC Viewer

I am attaching an image of my VNC Viewer
so that you can help me to correct the situation

thank you and good evening




<Capture d¡¯e?cran, le 2023-08-08 a? 17.00.41.png>


Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400







<Capture d¡¯e?cran, le 2023-08-08 a? 17.00.41.png>


Re: resolution

 

It is very hard to tell the actual resolution from a screen shot - since you can manipulate that very easily.

However, to answer your question - YES!
You can set the VNC resolution in your Raspberry Pi to a resolution even if there is no actual display connected.
With the newer versions of Raspberry Pi OS, you do it from them menu with
???? > Preferences >Raspberry Pi Configuration
????????? in the Display tab set the Headless Resolution value
For older version search on "Headless screen resolution" and you will get detailed instructions.

Robert Giuliano
KB8RCO



On Tuesday, August 8, 2023 at 05:22:15 PM EDT, Luc Drolet VE2LUQ <ldrolet@...> wrote:


Hello everyone,

i am using VNC Viewer to direwolf which is on the mountain
and I have a bad screen resolution

is it possible to change the resolution to see the image of my raspberry pi which is on top of the mountain with VNC Viewer

I am attaching an image of my VNC Viewer
so that you can help me to correct the situation

thank you and good evening







Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400








resolution

 

¿ªÔÆÌåÓý

Hello everyone,

i am using VNC Viewer to direwolf which is on the mountain
and I have a bad screen resolution

is it possible to change the resolution to see the image of my raspberry pi which is on top of the mountain with VNC Viewer

I am attaching an image of my VNC Viewer
so that you can help me to correct the situation

thank you and good evening







Luc Drolet VE2 LUQ
Pr¨¦sident de VE2CVA
C.R.A.V.A.
Club Radio Amateur Vall¨¦e de l'Amiante
VE2 CVA
ve2cva@...
ldrolet@...
https://www.facebook.com/groups/ve2cva
Instagram :?https://www.instagram.com/ve2cva/
Echolink = ? VE2RVA-R ? ?NODE #24560
S¨¦curit¨¦ Civil du Qu¨¦bec, Node #1400








Re: Adding a PTT LED

 

Hi,

The NE555 timer chip supports strong output currents (TI specifies +/- 225mA) and therefore adding a parallel LED circuit is of no concern and in fact the preferred solution. It will work equally well with small signal LEDs as well as super-bright LEDs (which require higher currents but will be clearly seen even in sunshine). The only concern in that case is the load on the on-board 5V to 3.3V regulator in the Raspberry Pi to avoid overloading it (early Pi's had a linear regulator that only supported 50mA. now they have a switching regulator that will support 500mA).

However care must be taken when using outputs from other chips (such as low-power micro-controllers) that aren't designed to drive large loads. I designed a simple circuit that uses the drive current for the PTT transistor to illuminate a small signal LED. The original resistor is replaced with a LED and resistor in series. The value of the new resistor is lower to compensate for the voltage drop of the LED. The current through the LED is large enough to illuminate a small signal LED but also small enough to be within the design limits of the GPIO output and the transistor input. This is also an efficient design for battery operation since there is no increase in power consumption.

Thanks
Thomas
KK6FPP


Re: Adding a PTT LED

 

Inline image


Patrick (N3TSZ)


On Tuesday, August 8, 2023 at 09:07:17 AM EDT, Matthew Redding <matthew.j.redding@...> wrote:


I was looking to create my own interface with perfboard and liked the idea of a built in timeout timer as shown in and included below. However, I would also like it if there was also a PTT LED and was wondering if anyone had any suggestions where to add it. Thanks!


Re: Adding a PTT LED

 

On Tue, Aug 8, 2023 at 11:12 AM, Rob Giuliano wrote:
Adding an LED and limiting (say 1k) resistor between pin 3 and 2k7 resistor would work.
This put the LED circuit in parallel with 2N2222 base bias.
Poor description.
I didn't state 'to ground', but indicating 'This puts the LED in parallel with the wN2222 base bias' was to pass the information.
David's description was much more descriptive.
?
-------
Rob KB8RCO


Re: Adding a PTT LED

 

>Adding an LED and limiting (say 1k) resistor between pin 3 and 2k7 resistor would work.

And it might not.

There may not be enough voltage (3v3) to forward bias the transistor and an LED if they are in series.

David's idea of adding the LED from pin 3 to ground with a resistor would work (parallel to the transistor).

Danny
K5CG


Re: Adding a PTT LED

 

¿ªÔÆÌåÓý


Hello Matthew,

If I understand that circuit correctly, connect a 1k resistor to pin 3 of the 555 IC.? On the other side of the resistor, connect it to the longer lead of the LED (anode).? Connect the shorter lead of the LED (cathode) to ground.? Btw, here is a designed PCB that includes a PTT and DCD LED and makes the delay adjustable too:

??

--David
KI6ZHD


On 08/07/2023 04:18 PM, Matthew Redding wrote:

I was looking to create my own interface with perfboard and liked the idea of a built in timeout timer as shown in and included below. However, I would also like it if there was also a PTT LED and was wondering if anyone had any suggestions where to add it. Thanks!



Re: Adding a PTT LED

 

I assume you want it on the actual control circuit, and not on the timer request input.
Adding an LED and limiting (say 1k) resistor between pin 3 and 2k7 resistor would work.
This put the LED circuit in parallel with 2N2222 base bias.

-------
Rob KB8RCO


Adding a PTT LED

 

I was looking to create my own interface with perfboard and liked the idea of a built in timeout timer as shown in and included below. However, I would also like it if there was also a PTT LED and was wondering if anyone had any suggestions where to add it. Thanks!