Yes, I think I'll order from Mouser, Newark or Digikey - they have them for around $10ea (I tried to save $$ but....)
toggle quoted message
Show quoted text
On Friday, June 5, 2020, 2:41:32 p.m. EDT, Gyula Molnar <gyula.ha3hz@...> wrote: On Fri, Jun? 5, 2020 at 07:26 PM, Larry Rothman wrote:
STM32F303
I¡¯m just asking in parentheses why don¡¯t you buy from a reputable seller? With us, farnell is a good name. -- *** If you are not part of the solution, then you are the problem. ( ) ***
|
Re: white screen and flashing
The traces on the LCD flex circuit can crack if the flex is bent at a right angle.
Also, a few other forum members have seen this issue - they carefully removed the LCD (just release it from the metal frame around the edges) tilted it up and re-touched the soldering. Then, snap the LCD back into the frame.
Good luck!
toggle quoted message
Show quoted text
On Friday, June 5, 2020, 2:46:29 p.m. EDT, Rich <k0zx.co@...> wrote:
Its the activity LED that's flashing, always.
Just tried the usb path and yes that's ok, so a display issue does appear to be the issue, just ran a few sweeps and ok except for screen still white. Will check that, tnx Larry
|
Re: white screen and flashing
Its the activity LED that's flashing, always.
Just tried the usb path and yes that's ok, so a display issue does appear to be the issue, just ran a few sweeps and ok except for screen still white. Will check that, tnx Larry
|
On Fri, Jun 5, 2020 at 07:26 PM, Larry Rothman wrote:
STM32F303
I¡¯m just asking in parentheses why don¡¯t you buy from a reputable seller? With us, farnell is a good name. -- *** If you are not part of the solution, then you are the problem. ( ) ***
|
I guess I am just the opposite. I'm a smart guy and good at figuring things out. I will spend literally hours searching high and low for information before I break down and ask someone. I almost consider it a personal failing if I can't figure it out myself (with the help of those things called "search engines"). Maybe it's partly because I cut my teeth on dialup BBSes run by university professors and students back in the 80s. If you didn't come prepared and not having done your "homework" they would eat you alive. Keep up the good work guys! 73 -Jim NU0C On Fri, 5 Jun 2020 18:07:38 +0000 (UTC) "Larry Rothman" <nlroth@...> wrote: Hi Bruce,
This forum is run by Amateurs for Amateurs and the Wiki and Files sections have been put together over time (the forum is 1 year old now!) from questions that were asked and answers that were offered - by forum members.
When one joins this forum, there is a big red arrow on the homepage that says - Look in the WIKI and FILES sections - lots of info there! ...And don't forget the links at the bottom of EVERY emailed post.
And there IS lots of info there - and it is the fact that many of the original members keep seeing the SAME QUESTIONS over and over again that we've just taken to say: Look in the Wiki.
I don't know how much more we could hit these people over the head with the information - but they would rather ask first and look later.
Sorry if that gets your shorts in a knot.
If someone says - "Hey, I looked in the Wiki and didn't find the info, can someone help?" a pile of members will chime in to help.
Please remember - anyone can add/edit Wiki info. If you have what you believe is relevant information for forum members, feel free to add an entry yourself - just keep it to the point and use any web links as needed.
Cheers,
Larry
On Friday, June 5, 2020, 1:52:15 p.m. EDT, BruceN <k4tql@...> wrote:
Gary,
This is something that I have issues with, too.? It reminds me of the day, way back in the day, when I asked someone where I could find documentation regarding the Unix operating system.? This was before the Internet (over 50 years ago).? The answer was "you just gotta know".
When the answers to your questions are "read this wiki" or "read that wiki", the answer is just the same as: "you just gotta know where to look".? It would be just as easy for a response to be furnishing a link to "where" to look.? And, as in your case, maybe you looked there and missed it.? Happens to me all the time.? And maybe there is a better place to look as one responder provided.
I've run into many instance of this smug attitude of "I know and you don't.? Go find it yourself".? I'll bet a lot of them wouldn't know how to solder two wires together without burning themselves for all their "knowledge".? I knew professors of electrical engineering in college who couldn't change their car battery.? That wasn't an electrical task, it was a mechanical task.
And, no I can't answer your questions either.? If you find a good place to find them, let me know.? I need the answers, too.? You might also point out where you have looked unsuccessfully.
BruceN / K4TQL
|
Re: white screen and flashing
Which LED is flashing - the charge or the other activity LED?
The activity LED flashes as a sweep is occurring. If you're only getting a white screen, check that a solder connection under the LCD has not cracked.
Can you still access the device via the console over a USB connection? If YES, then it sounds like an LCD issue.
Good luck
|
Hi Bruce,
This forum is run by Amateurs for Amateurs and the Wiki and Files sections have been put together over time (the forum is 1 year old now!) from questions that were asked and answers that were offered - by forum members.
When one joins this forum, there is a big red arrow on the homepage that says - Look in the WIKI and FILES sections - lots of info there! ...And don't forget the links at the bottom of EVERY emailed post.
And there IS lots of info there - and it is the fact that many of the original members keep seeing the SAME QUESTIONS over and over again that we've just taken to say: Look in the Wiki.
I don't know how much more we could hit these people over the head with the information - but they would rather ask first and look later.
Sorry if that gets your shorts in a knot.
If someone says - "Hey, I looked in the Wiki and didn't find the info, can someone help?" a pile of members will chime in to help.
Please remember - anyone can add/edit Wiki info. If you have what you believe is relevant information for forum members, feel free to add an entry yourself - just keep it to the point and use any web links as needed.
Cheers,
Larry
toggle quoted message
Show quoted text
On Friday, June 5, 2020, 1:52:15 p.m. EDT, BruceN <k4tql@...> wrote:
Gary,
This is something that I have issues with, too.? It reminds me of the day, way back in the day, when I asked someone where I could find documentation regarding the Unix operating system.? This was before the Internet (over 50 years ago).? The answer was "you just gotta know".
When the answers to your questions are "read this wiki" or "read that wiki", the answer is just the same as: "you just gotta know where to look".? It would be just as easy for a response to be furnishing a link to "where" to look.? And, as in your case, maybe you looked there and missed it.? Happens to me all the time.? And maybe there is a better place to look as one responder provided.
I've run into many instance of this smug attitude of "I know and you don't.? Go find it yourself".? I'll bet a lot of them wouldn't know how to solder two wires together without burning themselves for all their "knowledge".? I knew professors of electrical engineering in college who couldn't change their car battery.? That wasn't an electrical task, it was a mechanical task.
And, no I can't answer your questions either.? If you find a good place to find them, let me know.? I need the answers, too.? You might also point out where you have looked unsuccessfully.
BruceN / K4TQL
--
*"To invent, you need a good imagination and a pile of junk"* -- Thomas Alva Edison (1847-1931)
|
Re: white screen and flashing
hi Gyula,
tnx for the info on your site on different models. Was there something there related to the problem I posted that maybe I missed?
|
Gary,
This is something that I have issues with, too. It reminds me of the day, way back in the day, when I asked someone where I could find documentation regarding the Unix operating system. This was before the Internet (over 50 years ago). The answer was "you just gotta know".
When the answers to your questions are "read this wiki" or "read that wiki", the answer is just the same as: "you just gotta know where to look". It would be just as easy for a response to be furnishing a link to "where" to look. And, as in your case, maybe you looked there and missed it. Happens to me all the time. And maybe there is a better place to look as one responder provided.
I've run into many instance of this smug attitude of "I know and you don't. Go find it yourself". I'll bet a lot of them wouldn't know how to solder two wires together without burning themselves for all their "knowledge". I knew professors of electrical engineering in college who couldn't change their car battery. That wasn't an electrical task, it was a mechanical task.
And, no I can't answer your questions either. If you find a good place to find them, let me know. I need the answers, too. You might also point out where you have looked unsuccessfully.
BruceN / K4TQL
--
*"To invent, you need a good imagination and a pile of junk"* -- Thomas Alva Edison (1847-1931)
|
Well, unfortunately it appears I was sent a defective STM32F303.
I removed it and put the original F072 back and my Nano is working again.
I thought I might have a problem when I saw that the seller had wrapped shipping tape around the chip carrier to hold the F303 in place. So much for no antistatic precautions.
I'll have to see if the seller will send me a replacement, wrapped in aluminum foil.
toggle quoted message
Show quoted text
On Thursday, June 4, 2020, 8:34:24 p.m. EDT, Hugen <hugen@...> wrote:
Try this early test version, it can run on F303 without external crystal, there may be a lot of errors.
|
Hello,
What I have not seen up to now is a *permission* problem fix with the access to the USB serial port (nanoVNA).
What to do:
# Add user to group dialout, for USB-Serial access.
$ sudo usermod -a -G dialout <user name>
# Reboot
$ groups
rudi adm dialout cdrom sudo dip plugdev lpadmin lxd sambashare vboxsf
# "dialout" must show up in the list.
73, Rudi DL5FA
|
Re: ¡°Fixture In A Hurry¡±. And a Transformer.
Finger mistake
20Log(10)(1/67) = ¨C36dB
toggle quoted message
Show quoted text
-----Original Message----- From: Lee Sent: Friday, June 05, 2020 10:05 AM To: [email protected]Subject: [nanovna-users] ¡°Fixture In A Hurry¡±. And a Transformer. Although I got my NanoVNA back in ?February? I have not taken time to work with it much. I did purchase a bag with ?10? PCB edge mount SMA connectors and after yesterday¡¯s traffic about ¡°NanoVna Test fixture¡± decided it was time to get some PCB copper clad and a Dremmel and make up my ¡°Fixture In A Hurry¡±. See attached. I though what might be fun to test and the transformer I use in a HV power supply came to mind. It is a CoilCraft part number: FL2015-2LB I drove the secondary and measure the primary. Both primary and secondary I loaded with 50ohms shunt to ground. (Was the shunt a good idea?) Turns ratio 1:67 so, if I am operating the calculator correctly this should be 10Log(10)(1/67) = ¨C36dB I measured S11 and S21 with NanoVNA Saver. The S21 measurement way down at 50KHz. is about the ¨C36 predicted. Note the S21 measurement gets the saw tooths (sawteeth?) soon after 50KHz. +++++++++++++++ Lee Erickson Spectrum Techniques LLC. lee@...
|
Weird! I tried get it working on my Windows PC, and everything seemed to be going fine. However, while using the calibration assistant built-in to NanoVNASaver, I had a similar crash due to pyserial. This was also with Python 3.7 instead of 3.8 that I have on my Linux box. Now I'm starting to suspect the firmware that I flashed last year, ttrftech version 0.5.0-1. Further experimentation needed.
|
¡°Fixture In A Hurry¡±. And a Transformer.
Although I got my NanoVNA back in ?February? I have not taken time to work with it much. I did purchase a bag with ?10? PCB edge mount SMA connectors and after yesterday¡¯s traffic about ¡°NanoVna Test fixture¡± decided it was time to get some PCB copper clad and a Dremmel and make up my ¡°Fixture In A Hurry¡±. See attached.
I though what might be fun to test and the transformer I use in a HV power supply came to mind.
It is a CoilCraft part number: FL2015-2LB
I drove the secondary and measure the primary. Both primary and secondary I loaded with 50ohms shunt to ground. (Was the shunt a good idea?)
Turns ratio 1:67 so, if I am operating the calculator correctly this should be 10Log(10)(1/67) = ¨C36dB
I measured S11 and S21 with NanoVNA Saver.
The S21 measurement way down at 50KHz. is about the ¨C36 predicted.
Note the S21 measurement gets the saw tooths (sawteeth?) soon after 50KHz.
+++++++++++++++
Lee Erickson
Spectrum Techniques LLC.
lee@...
|
Re: Rotted Link to NanoVNA-Saver on Wiki
Lee,
When accessing web links, if you find a dead link, go up one level to see if anything has changed.
If you look at
You will see there is a German and English folder.
Have a look in those folders and you will find the updated filename info.
I will update the forum wiki.
Cheers,
Larry
toggle quoted message
Show quoted text
On Friday, June 5, 2020, 9:20:58 a.m. EDT, Lee <lee@...> wrote: I am trying to come up to speed with my NanoVNA and the NanoVNA Saver software on my own (not asking every single question on the forum). I have installed NanoVNA-Saver and connected to my instrument but need instructions. Regarding the wiki at: /g/nanovna-users/wikiThe link on getting started with NanoVNASaver goes to a message with a link that has rotted ? ? Getting Started (NanoVNA-saver Version 0.2.0) by Gunthard Kraus, DG8GB ? ? /g/nanovna-users/message/7663The rotted link: ? ? < At this moment this is my stumbling block to getting further with NanoNVA Saver. What should I do? Lee Erickson
|
Re: Rotted Link to NanoVNA-Saver on Wiki
Update.
Still no luck finding the article. The way back machine had some of his information but not on the NanoVNA-Saver.
Gunthard Kraus looks to have had some nice work.
Lee
toggle quoted message
Show quoted text
-----Original Message----- From: Lee Sent: Friday, June 05, 2020 9:19 AM To: [email protected]Subject: [nanovna-users] Rotted Link to NanoVNA-Saver on Wiki I am trying to come up to speed with my NanoVNA and the NanoVNA Saver software on my own (not asking every single question on the forum). I have installed NanoVNA-Saver and connected to my instrument but need instructions. Regarding the wiki at: /g/nanovna-users/wikiThe link on getting started with NanoVNASaver goes to a message with a link that has rotted Getting Started (NanoVNA-saver Version 0.2.0) by Gunthard Kraus, DG8GB /g/nanovna-users/message/7663The rotted link: < At this moment this is my stumbling block to getting further with NanoNVA Saver. What should I do? Lee Erickson
|
Rotted Link to NanoVNA-Saver on Wiki
I am trying to come up to speed with my NanoVNA and the NanoVNA Saver software on my own (not asking every single question on the forum). I have installed NanoVNA-Saver and connected to my instrument but need instructions. Regarding the wiki at: /g/nanovna-users/wikiThe link on getting started with NanoVNASaver goes to a message with a link that has rotted Getting Started (NanoVNA-saver Version 0.2.0) by Gunthard Kraus, DG8GB /g/nanovna-users/message/7663The rotted link: < At this moment this is my stumbling block to getting further with NanoNVA Saver. What should I do? Lee Erickson
|
Genuine NanovnaH4 back in stock r&l electronics
#nanovna-h4
Just thought I'd let the group know that r&l electronics has the h4s back in stock for $59.95. f o b Hamilton Ohio so shipping will be fast. I have no interest other than being a satisfied customer of r&l.
--
Randy AB9GO
Milan Indiana USA
|
hi, then I will help you with the solution: you download the ...- master.zip on github, unzip it and find a "fixture" folder in it where you can find the gerber files to make the pcb. You will usually need to send this in .zip packaging to the pcb manufacturer who manufactures it. By the way, Dan, KW4TI is the author who made it all. Its name is on the first page of the presentation. You can read about it in another group here: /g/radioartisan/topic/latest_version_of_the/53014887I wish you a successful making. 73, Gyula HA3HZ -- *** nothing is permanent only change ( ) ***
|
Hi,
If you are viewing this message on your mail client a link at the bottom of the message will take to the io group page and then files and wiki menu will be on the left of your screen.
73,
Bill KU8H
bark less - wag more
toggle quoted message
Show quoted text
On 6/5/20 5:00 AM, Jon-G0MYW wrote: there's lots of real good information (+ manual) in the "Files" + "Wiki" section on the left of this screen....
|
Gyula Molnar
Jim Shorney
Ignilux
Randy.AB9GO