Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




163 posts

Master Geek
+1 received by user: 10


Topic # 185152 11-Nov-2015 19:34
Send private message

our  replacemen,t second hand , laptop we got to run our weather station keeps crashing.
we have  narrowed it down to the usb to serial drivers that connect the davis weather station to the laptop.
they kept wanting to reinstall and the laptop would get the BSOD.
we also noticed that everytime we turned a desk lamp  next to the lap top on or off the computer beeped.
then we realised that it was when we turned the lamp off that the computer crashed
they were both on the same plug box with the davis station.
what was happening. ?
was it a power surge when i turned the light off combined with the fact that i have disabled all the power saving features in the laptop so it runs constantly and does not shut down.
we had an old 2 GB ram toshiba running the station but it was getting tired, we have a POE weather cam and flight tracker and are ftping to different sites and it was very slow.
we now have a HP pro 6560 with i7 quad core with 8GB, very fast and very flakey

Create new topic

gzt

9262 posts

Uber Geek
+1 received by user: 1320


  Reply # 1426554 11-Nov-2015 21:25
Send private message

What is flakey about the new machine?



163 posts

Master Geek
+1 received by user: 10


  Reply # 1426609 11-Nov-2015 22:35
Send private message

The old Toshiba never crashed and it was connected to the same circuitry.
Actually I think some of our older stuff does not like win 64 bit .
We have taken the lamp out of the picture.
If that was what was.causing all the crashes I would like to know exactly why

 
 
 
 


gzt

9262 posts

Uber Geek
+1 received by user: 1320


  Reply # 1426646 12-Nov-2015 01:19
Send private message

It is hard to imagine a normal desk lamp causing that.

Is it a fluorescent lamp? They have inductive ballast can sometimes be faulty.

1. Maybe a power supply & filtering issue? Do you have an equivalent laptop power supply you can try with this machine and the lamp?

2. Try the lamp near the laptop while it is battery only. That will be interesting if EM shield failure.

3. Lastly run some memory diags on that machine. Maybe a borderline issue raised by the spike.



163 posts

Master Geek
+1 received by user: 10


  Reply # 1426650 12-Nov-2015 06:52
Send private message

Thanks

gzt

9262 posts

Uber Geek
+1 received by user: 1320


  Reply # 1427146 12-Nov-2015 20:09
Send private message

If bios beep then probably a power level event. Check windows event log for that time and see if it records the issue.

Bad fault on the lamp or maybe a multibox or other power issue?

Otherwise it is a machine/power supply issue. Call your manufacturer support and record the issue. It is possible they wlll send a new power supply or wait for some recurrence. Good idea to get this sorted well inside warranty if it is a machine issue.



163 posts

Master Geek
+1 received by user: 10


  Reply # 1427265 12-Nov-2015 22:27
Send private message

It is second hand machine.
I have plugged lamp into extension lead on different circuit.
I think it is multi box, some of the sockets are loose.
It was cheap box
You get what you pay for.
We.will see if this stops crashing

gzt

9262 posts

Uber Geek
+1 received by user: 1320


  Reply # 1427272 12-Nov-2015 22:42
Send private message

Yeah some of those are downright evil.

20578 posts

Uber Geek
+1 received by user: 3962

Trusted
Subscriber

  Reply # 1427304 13-Nov-2015 05:06
Send private message

Bluescreening on USB to serial devices is usually caused by counterfeit prolific pl2303 based converters. I have had it occasionally with some others if I unplug and replug it quickly or else accidentally short USB power so it re-enumerates quickly after disappearing.

The problems I have had with them is they will only work with old drivers, and they will bluescreen on disconnection often.

This is probably being caused by a spike on the ground because you have made a ground loop with the other end of the serial connection been grounded or coupled to the mains somehow with another power supply. If the beep when you turn the lamp on and off is the USB unplugged one, then thats pretty much certain.

So I would get a better USB to serial, and a RS232 isolator. Depending if you need handshaking signals or just data, you can get them pretty cheap on the usual china sources, some need power on both sides, others will have an isolated DC to DC converter in them to push power across to the isolated side.

This is assuming that it is the USB connection to the weather station causing the problem. If you have other stuff connected to the PC any of them could be doing it.

Possibly the old laptop did not have an earth on its power supply so was not able to make a ground loop with the weather station or something else you have connected?




Richard rich.ms



163 posts

Master Geek
+1 received by user: 10


  Reply # 1427326 13-Nov-2015 07:30
Send private message

Thank you I think you have completely summed up the situation.
We brought a separate data logger module for the Davis weather station from Davis . $360 not cheap.
And the beep was the disconnect hardware beep.
I am relived it is not a fault with the laptop.
The program .who crashed. Said it was the silicon labs drivers for the converter.
I think a serial port converter would have been more stable.but not all computers have them now.
The new stations are all going wireless.
But I prefer to use cabled stuff where ever possible to.keep my wireless space uncluttered for stuff that has to be wireless.
Based on your.info I am confident we can sort this situation.
Once again thank you , I knew asking on the forum was the way to go

20578 posts

Uber Geek
+1 received by user: 3962

Trusted
Subscriber

  Reply # 1427709 13-Nov-2015 18:03
Send private message

This is cheap enough its probably worth a gamble on. No idea how they are powering it, if its passivly stealing power off the handshake lines then it may not work if the weather station only has the data lines going anywhere.

http://www.aliexpress.com/item/Hot-selling-Light-xtc-232-rs-232-serial-port-optical-isolator-rs232-serial-converter/32267779255.html?ws_ab_test=searchweb201556_1_21_79_78_77_92_91_22_80_61,searchweb201644_5,searchweb201560_9





Richard rich.ms



163 posts

Master Geek
+1 received by user: 10


  Reply # 1427742 13-Nov-2015 20:11
Send private message

Thank you for that link.
Ever since I took the lamp out of the system there has been no problem
I think it must have been a grounding issue causing a power surge.
I will keep a note of the link in case we still have problems.
Cheers

Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

New Zealand hits peak broadband data
Posted 18-Jan-2018 12:21


Amazon Echo devices coming to New Zealand early February 2018
Posted 18-Jan-2018 10:53


$3.74 million for new electric vehicles in New Zealand
Posted 17-Jan-2018 11:27


Nova 2i: Value, not excitement from Huawei
Posted 17-Jan-2018 09:02


Less news in Facebook News Feed revamp
Posted 15-Jan-2018 13:15


Australian Government contract awarded to Datacom Connect
Posted 11-Jan-2018 08:37


Why New Zealand needs a chief technology officer
Posted 6-Jan-2018 13:59


Amazon release Silk Browser and Firefox for Fire TV
Posted 21-Dec-2017 13:42


New Chief Technology Officer role created
Posted 19-Dec-2017 22:18


All I want for Christmas is a new EV
Posted 19-Dec-2017 19:54


How clever is this: AI will create 2.3 million jobs by 2020
Posted 19-Dec-2017 19:52


NOW to deploy SD-WAN to regional councils
Posted 19-Dec-2017 19:46


Mobile market competition issues ComCom should watch
Posted 18-Dec-2017 10:52


New Zealand government to create digital advisory group
Posted 16-Dec-2017 08:47


Australia datum changes means whole country moving 1.8 metres north-east
Posted 16-Dec-2017 08:39



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.