Why didn't GPS crash? Antique Soldering Iron (Blowtorch) 2 days ago   12:20

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standupmaths
More on the GPS roll-over.
https://www.theregister.co.uk/2019/02/12/current_gps_epoch_ends/

"In the Future the Modernized GPS Navigation (CNAV and MNAV) message has a 13-bit week number, which for all practical purposes solves this ambiguity"
https://www.gps.gov/cgsic/meetings/2017/powers.pdf

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CORRECTIONS
- Sorry: I used “overflow” to refer to when the value bursts into the adjacent memory as opposed to just rolling back to zero. But an overflow can simply mean it has rolled over.
- I add the extra week bits to the wrong side of the number! Unbelievable. I even point to the other side of the screen in the video. Somehow I totally missed this until it was too late. I’m surprised loads of people are not pointing it out. So far only Kyle K has noticed. Good on you, Kyle.
- Let me know if you spot anything else!

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Comments 830 Comments

Nostalgia Catholic
Word from 157 years in the future:  Actually, the end of the epoch was no problem as it was coded around in a manner quite analogous to your relatively primitive "GPS" system (now simply called "PS1" for reasons which begin to be obvious even back in your time) for handling the rollover as implemented back in 2008 or so.  But this barely even matters now as the PS1 (for Positioning System 1 - by 2018 Google was already test marketing what we now call PS2 based on detailed image data which sadly became substantially unusable in 2146 for reasons I cannot talk about) now only has about a 5% portion of the market share, not enough to justify additional satellites, of which we are down to only 13 left, so PS1 doesn't even work except when at least four of those remaining satellites are visible (yet it still has those who swear by it for odd reasons)
Richard Holmes
Too bald now. Credibility gone. Shame. Was one of the good ones.


Just kidding. I'm a bald brother, brother.
caiwangheng
Man that dog is cute
Jakob Lindskog
This leaves me with 2 questions:
1. Why 13 bits???
2. Why this stupid system with weeks?? My calculations show that the 10 bits would have done better work alongside the already needed 20 bits for measuring seconds into the week. With 30 bits for seconds since 1980, the rollover would be 34 years. For completeness sake, adding three bits to that would increase the range to 272 years. Alas, weeks are simply stupid
Andrew Moore
You embraced!!!
I salute you
Random Everything
This is good to know. I have the same GPS and I'm happy to find out that it should work just find... just not the date of sunrise/set times which is not a deal breaker.
The reason It took soo long the first time to gain a signal is because it has been so long since you used it, and you likely used it a few hundred kms away from last point of use.
Matija Tomic
This hapoened in my mother's car. 2011 Peugeot 308. The option for sycing the date with GPS was set and the car thought it was year 2099, because... No point in car from 2011 to know year 1999 exists...
DelphiTheDolphin
I bet the future viewers, if no WW3 wiped us from existence , think the "We're sorry" is more needed for the climate change we done in our time here.
ejonesss
another reason it did not crash is like the dns changer malware the government probably took over some key system and kept it running to prevent devices from crashing
TheFlyerX
I have the same gps device an its working showing my correct location and local time, but not the date. My GPS is living in the late 90s now.
BoyWonder193
My satnav broke 😂
Dmitry Granicin
Walking? Yeah that uses GPS. Driving? Nah mate, that thing is called a SAT-NAV.
Paul Brough
What is the firmware version of your Etrex? I upgraded mine once years ago to V2.14 and the date is correct.
Michael D.
Make the number 6348-bit and it will last for a million years
logicaldistraction
I finally know why my car doesn't show the time anymore ^^. Thanks Renault... (I think I can update it but I was lazy)
Aaron Lowe
Actually this made the video more interesting. Got an insight into how much we're connected to technology. And also shows that the little built in microphone in the GoPro doesn't match the video quality, hence why people use a separate mike and mix the audio later on, and why some videos on Youtube therefore have syncing issues. It's all coming together....
Mark J
All it takes is one nuclear weapon in LEO and sat nav is dead. The yanks have done it before they will do it again
Unnamed RedShirt
1:07 But that is overflow? By definition?
Tom Sienkowski
old gps, when you can find where you're going by trial and error before it finishes linking up :D
Jon Broomfield
interesting cos my Tomtom doesn't have the correct time anymore, I change it to be correct but when I go back the mornal screen its 00.00 again.. havn't checked the date even if it has 1 but i'm guessing this epoch thingy is why the time isn't working anymore?. Tomtom is maybe 8yrs+
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Antique Soldering Iron (Blowtorch) Why didn't GPS crash? 2 days ago   22:52

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In this video i'm restoring an old german soldering iron.

This item was sent to me by one of my patrons from Germany. He saw it on eBay, asked me if I'm interested and then he bought it. Thank you for that. I'll send it back to him now.
I really liked the look of the handle and that's why I decided to restore it. It's a propane gas powered soldering iron made by Perkeo. I don't know how old this one is, but they built them since 1919 until today. The modern ones still look pretty much the same as the one I restored in this video, they just made some small changes over the years. I'm very happy how this project turned out, I really like the contrast of the dark wooden handle and the polished brass.

I hope you like my work and the video.

Huge thank you to all of my Patreon and PayPal supporters and specially to:

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Timestamps:

00:00 preview
00:36 disassembling
02:18 showing all the parts
02:39 cleaning the parts with the parts washer
02:57 disassemling two more parts
03:17 removing patina and soot with vinegar, salt and flour
04:07 restoring the wooden handle
04:40 restoring the big tube
06:10 stain the wooden handle
06:38 making a new ring for the wooden handle on the lathe
07:36 restoring the nut which tightens the wooden hanlde
08:04 restoring the holder of the soldering iron
08:46 restoring the sieving head and remake the knurling
09:21 restoring the sieving head cover
09:59 restoring the knurled ring
10:22 restoring the regulation part
10:47 restoring the valve needle
11:07 restoring the nut for the regulation part
11:31 restoring the valve tube
12:16 restoring the gas connection part
12:47 restoring the nut for the valve tube
13:13 restoring the nozzle
13:41 restoring the soldering iron
14:46 making a new holder for the soldering iron on the lathe, mill and welding machine
16:26 making a special countersinked bolt for the soldering iron
16:56 restoring the bolt to clamp the soldering iron holder
17:18 making a new handle for the previous restored bolt
18:47 making the steel parts black by heating up and quench in oil
19:14 showing all the parts before reassembling
19:34 reassembling
21:23 showing the finished product
22:00 final test


Time and costs of this restoration:

I was working on this project over 1,5 weeks
$16 tube for the gas connection
$1 clamp bride for the connection tube


My camera:
Panasonic HC-V180


If you have any questions about the process, machines i'm using or other stuff, just ask me in the comments. I read them all and i try to reply as soon as possible.

Sorry for my bad english, it's not my language. I try my best to improve my technical english.

Subscribe for more of my content. I'm uploading videos about mechanical stuff, as new creations and buildings and also restorations.

Thank you for watching :-)

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