#eevblog - 2019-11-23 - AustNet Archive Project

// #eevblog — 2019-11-23

1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
« 2019-11-22 2019-11-24 »
09:25 <DHess_US> Plus the front does not have a split bench seat
04:14 * T3sl4 scritches steve30
13:27 <coppice> It looks like Tesla have cracked the pickup market... sorry Tesla are on crack in the pickup market
14:35 <K> is it that bad?\
19:18 <coppice> When you show a new vehicle and half the reports start something like "I thought this was a joke when they revealed it" you are stepping into dangerious territory
21:35 <K> dunno, it does look different
22:16 <K> but why would it be considered a joke i do not quite understand
22:51 <DHess_US> http://forums.pelicanparts.com/off-topic-discussions/391522-random-transportation-pictures-2254.html#post10626371
22:52 <K> hurr durr does not look like my megadodgeramwhatever, let's roll coal, wooo!!!
23:09 <DHess_US> https://www.classicdriver.com/en/article/cars/classic-concepts-1980-aston-martin-bulldog
23:47 <DHess_US> Actually it reminds me of the Landmaster, https://en.wikipedia.org/wiki/Landmaster
25:14 <coppice> K: you wouldn't assume that was a joke riffing on the Mad Max movies, with the real vehicle still to be revealed later in the presentation
26:06 <DHess_US> Just consider it research and development by Tesla.
26:27 <coppice> the broken window video is hilarious
27:07 <K> that was a bit silly, true
34:54 <coppice> I wonder if Tesla looked at the Rivian and decided they needed something as unlike that as possible?
46:11 <DHess_US> Use a standard pickup truck frame so you can sell it with different beds. What they have is more like a Monte Carlo or the other one.
47:53 <DHess_US> Which brings up why that style of vehicle fell out of favor. People loved them but the EPA effectively banned them.
48:19 <DHess_US> Which is what led to the whole low milage SUV craze.
50:18 <coppice> It looks like they've at least partly been inspired by Australian utes
50:41 <DHess_US> Utes? What's an ute?
51:05 <coppice> its an Australian form of pickup truck. I assume its short for utility
51:19 <DHess_US> https://www.youtube.com/watch?v=Hu8tX2BAD1k
51:37 <coppice> That's a greast movie
37:19 <DHess_US> "And obviously you can't drive around in a military truck with a pollution test certificate that's expired, in a war zone, that would be nuts."
04:03 Quit: etal ([email protected]) Ping timeout: 121 seconds
47:57 <DHess_US> https://img.pr0gramm.com/2019/11/22/8d08a41351b64ad4.jpg
27:37 <EEVBlog> New EEVBlog Tweet: NEW EEVblog Video! EEVblog #1264 - uSupply Software Development Setup https://t.co/PoyKDviFNx
36:23 Join: DogWomble ([email protected]) to #EEVblog
36:32 Mode: (by ChanOP) +o DogWomble
38:55 <DHess_US> https://img.pr0gramm.com/2019/11/22/0150f7495538370d.jpg
04:49 Join: etal ([email protected]) to #EEVblog
05:46 <Halcyon> Morning
05:51 <steve30> hi Halcyon
05:55 <Halcyon> Hey Steve :)
06:49 <steve30> I had a play with Roger's CNC machine
06:54 <Halcyon> Oh yeh?
07:00 <steve30> I also got incoming calls working in Asterisk.
07:13 <Halcyon> They weren't working before?
07:20 <steve30> nope
07:32 <Halcyon> Ahh
08:41 <steve30> Need to get outgoing calls working now
09:02 <Halcyon> I had to mess with the settings a little bit to suit my ISP
09:15 <Halcyon> But someone had already done it so I just copied them
12:07 <steve30> done it :)
12:37 <Halcyon> YAY
15:56 <EEVBlog> New EEVBlog Tweet: AUCTION: A ton of vintage stuff in Melbourne: https://t.co/dSoBga7mNu
16:42 <Halcyon> Ooh a Telex machine
20:30 <steve30> cool
21:20 * steve30 hugs Halcyon 
21:28 <Halcyon> Aww :)
22:11 <coppice> Ooh an antique telephone exchange. Maybe someone should integrate it with Asterisk
22:20 <Ampera> Hi Halcyon
22:24 <Halcyon> Hehe :)
22:26 <Halcyon> Hey Ampera
22:32 <Ampera> How do
22:55 <Halcyon> Not bad, how about you?
23:01 <Ampera> Good. I'm working on a project.
23:06 <Halcyon> Oh yeh?
23:14 <coppice> Looks like a museum must have gone into liquidation
23:26 <Ampera> With a presentation. I have to, to a room full of people, explain the entire breakup of Yugoslavia in 5-10 minutes.
23:51 <Halcyon> That should be fairly easy for you
23:55 <Ampera> lol
24:14 <Ampera> I enjoy presentations, at least the concept, but Yugoslavia's breakup was incredibly complicated
24:25 <Ampera> I could teach an entire class on it.
24:29 <coppice> Ampera: do you get extra marks for making Bill Clinton look especially bad?
24:37 <Ampera> lol
24:49 <Halcyon> Sure. I think it easier to reduce content down, rather than try and pad things out when you have not enough content and too much time
25:43 <coppice> strip it down and you'll miss out juicy stuff, like the death toll due to the Monica Lewinsky scandal
26:00 <EEVBlog> New EEVBlog Tweet: NEW Video on EEVblog2! Normalising Audio - The Levelator vs Auphonic https://t.co/8md7lFjSsg
26:11 Join: rust_collector ([email protected]) to #EEVblog
31:32 Join: IDE ([email protected]) to #EEVblog
31:37 <IDE> hello hello
31:55 * Ampera throws a SCSI card at IDE
32:32 * rust_collector throw a burnt off piece of wire in a random direction
32:47 <Halcyon> Hey IDE
33:38 * Ampera skillfully excludes Czechoslovakia from his maps, as to avoid having to answer too many questions
33:58 <Halcyon> Just limit question time to 5 minutes
34:06 <Ampera> Question time is 0 minutes long.
34:19 <Halcyon> Even better
34:35 <rust_collector> I am thinking it might be time for some newer maps, maybe?
34:35 <Halcyon> I should mow the lawns today
34:54 <Ampera> rust_collector, then they wouldn't have Yugoslavia on them :P
35:07 <rust_collector> eeh, exactly
35:41 <rust_collector> what are you up to?
35:49 <rust_collector> maps and questions
35:55 <Ampera> In 5-10 minutes I need to, using a presentation, explain the breakup of Yugoslavia.
36:03 <rust_collector> oh crap
36:18 <Halcyon> https://www.youtube.com/watch?v=vsQrKZcYtqg
37:15 <rust_collector> use a scalpel, and cut all the countries, including kosovo out of the map, and show them... befor it was like this, then it was like a bunch of countries
37:17 <coppice> what a Turkey
37:50 <coppice> is bunch the correct collective noun?
38:17 <coppice> just like "a load of bollocks"
38:49 <rust_collector> well, maybe that is a better way to say it
39:20 <rust_collector> it used to be like this, then a load of bollocks
40:30 <Ampera> The way I describe it in five seconds is to say, it's a bunch of people who didn't like each other for hundreds of years and still don't today.
40:41 <IDE> my first time to this irc chatroom, I got a quick question for the ones who follows the eeblog. Here it is: I'm looking at picking a linear 12v power supply of 6.5amps. But I need best filtering possible (for audio hifi use)
40:55 <IDE> only looking at pointers on where to look at
41:12 * Ampera sneezes at T3sl4 
41:30 <Halcyon> Yes, I was about to say, power supplies sounds like a T3sl4 thing
41:40 <Halcyon> The guy never sleeps so he shouldn't be too far away :P
41:52 <steve30> I'm going for a shower
42:00 <Halcyon> Enjoy Steve
42:45 <rust_collector> I think T3sl4 is here more than Amperas bot
43:54 <coppice> Ampera: one religion of peace attacked another religion of peace, and after lots of killing and raping, stalemate ensued.
44:32 <Ampera> rust_collector, not unlikely because T3sl4 is here when AustNet'
44:36 <Ampera> 's TLS fucks up
45:06 <IDE> I am tempted to make my own power supply and pick best components
52:08 <coppice> Lead us not into temptation
53:27 <IDE> I'm not looking for someone to hold my hand and walk me through the entire process but any pointers I'd be grateful
54:03 <IDE> ideally if I can buy something from a brand that would be wonderful.
55:14 <coppice> most commercial power supply modules are now switchers
55:29 <IDE> noise filtering, regulation, tyring to get best stable 12v for audio stuff
55:31 <Halcyon> IDE: T3sl4 would be a good person to speak to, but it seems he isn't around at the moment. Feel free to stick around
55:57 <IDE> yes I could try to come back at a different time
56:32 <Halcyon> He is usually around
56:36 <IDE> cool
56:45 <Halcyon> He is US based, so a bit of a time difference
56:52 <IDE> i am in canada
56:57 <Halcyon> Ahh there we go
57:11 <Halcyon> Hey Ampera: Have you ever played with PXE booting a Raspberry Pi?
21:55 Quit: IDE ([email protected]) Quit: http://www.kiwiirc.com/ - A hand crafted IRC client
24:22 <EEVBlog> New EEVBlog Tweet: I turned it off and on again. The Solar Analytics system that is, there was nothing wrong with the Sunnyboy and solar array. https://t.co/m82JlZzBFT
50:29 <Ampera> Halcyon, I've barely played with the Raspberry Pi full stop
52:02 <T3sl4> buh
52:26 * Ampera hubs T3sl4 
52:37 * T3sl4 looks at Ampera's life through a tire hub
52:49 <T3sl4> hm, so i replaced the LEDs on my desk lamp, and now it doesn't work at any setting
52:57 <Ampera> \o/
53:07 <T3sl4> it appears i designed it for 55V nominal output, and the aux winding was always somewhat marginal
53:30 <T3sl4> i.e. can't throttle it down very far before it starts blinking off, because the fan pulls aux too low and the controller resets
54:09 <T3sl4> the old LEDs dropped something like 3.4V, the new ones almost 3 exactly
54:19 <T3sl4> so now even at full throttle it doesn't stay on
54:33 <T3sl4> i'll just throw on another turn to the aux winding, she'll be right
07:57 <T3sl4> there we go, 14V aux
08:14 <T3sl4> added 2 turns for apparently 10 total
14:11 <coppice> T3sl4: perhaps your desk lamp needs a DLP to get getter beam control. That's what Audi have just launched for their headlights
15:20 <T3sl4> i'm not nearly AUDacIous for that
17:19 <coppice> The demo looks very cool
17:55 <coppice> Wih a million pixels they can actually project images on the road
18:19 <T3sl4> does it have a vision system to detect oncoming cars and shine the optimal amount of hi-beam at them?
19:12 <coppice> they've been doing that for ages. Our Volvo does that. What Audi have added is a DLP so they have super fine control of where the beams shine
20:24 <coppice> in the demo they light exactly the lane you are in very brightly, and the adjacent lanes somewhat more dimly. The bright are tightly follows the lane markings
21:52 <T3sl4> also a surprisingly old system, but i imagine they have more nuance with the DLP
23:10 <coppice> Volvo first did it with mechanical masks, dynamically adjusting based on camera input. With LED headlights it was simplified, and various makes currently do it
23:45 <T3sl4> no, i mean cadillac did it with mechanical linkages back in like the 50s
24:00 <T3sl4> oh hey, i can run this light at full throttle without it hitting thermal limit, and throttle it nearly to minimum (5-10%) without it dropping out
24:19 <coppice> the cadillac system was not looking for oncoming cars, and adapting so you don't dazzle their drivers
25:16 <coppice> LED headlights are great. our car lights up country roads like a searchlight
25:49 <T3sl4> there was another that had photosensors, just to turn on/off hi-beams automatically of course
26:23 <coppice> I thought those were very short lived, because they were too quirky
26:29 <T3sl4> probably
26:32 <T3sl4> i'm just aware of its existence
26:39 <T3sl4> LEDs are impressively efficient these days, they actually dissipate palpably less power than their electrical input
27:05 <coppice> yeah, I sort of heard of that, but it never caught on
27:36 <coppice> T3sl4: they still get bloody hot, because most have inadequate cooling
28:28 <T3sl4> the ones i'm using are, uh, 2424 metric chip i think?
29:00 <T3sl4> the die probably still gets pretty toasty, but they seem to dissipate heat very well despite the small package, and my using 2oz copper under them
29:22 <T3sl4> or, to be fair, perhaps because of the small package
30:08 <coppice> I'm amazed those fake incandescent LEDs can dissipate well enough
31:11 <T3sl4> the filament ones must run so hot
32:04 <coppice> they seem to survive, and the failure rates are not through the roof
51:53 <EEVBlog> New EEVBlog Tweet: What happens when you don't spell check your company home page slogan. LOL https://t.co/ljdz5n4xTg
39:01 <T3sl4> https://www.reddit.com/r/BeAmazed/comments/e0820p/this_bamboo_forest_in_kyoto_japan/ bamboo prairie*
44:53 <DHess_US> Hmm, I read a detailed article about them.
45:35 <DHess_US> All high brightness phosphor LEDs run pretty hot.
46:13 <T3sl4> i'm guessing, besides the electrical improvements, progress has been made on the materials as well
47:58 <DHess_US> The phosphor itself runs very hot, https://www.nature.com/articles/s41598-017-18686-z
48:22 <DHess_US> I'm still looking for the article I read about it.
50:25 <T3sl4> a local design shop did the electricals of one of the early LEDs, the philips with the replaceable phosphor module
51:09 <T3sl4> that was an odd product, but not at all for technical reasons
51:09 <DHess_US> wikipedia has a lot of general details, https://en.wikipedia.org/wiki/LED_filament
51:29 <DHess_US> glass or saphire substrate. Many more LEDs are used so power density is lower.
52:30 <T3sl4> the LEDs i replaced, were the larger, gull wing leaded, dome shape kind
52:53 <T3sl4> i've had some of them solder in with a crazed or frosted lens, and they degraded quickly from there
53:13 <T3sl4> the lens also melts at soldering temp, no help there
53:27 <DHess_US> Yea, the LED filament bulbs are constructed more like a hybrid and I assume they use special solders.
53:48 <T3sl4> they were made with a clear overmolded (possibly polycarb?) lens, the phosphor being in a silicone blob over the die like most
54:14 <DHess_US> I wonder if anybody uses like a silver epoxy instead of solder.
54:20 <T3sl4> the new ones are small ceramic chips with phosphor-loaded silicone blob on top, there's much less distance for heat or light to travel
55:02 <T3sl4> hm, what's the thermal cycling performance of silver epoxy?
55:35 <DHess_US> You could ask the same question about any epoxy which includes a significant percentage of a binder.
56:23 <DHess_US> There are some thermally conductive epoxies which operate under similar conditions.
56:35 <T3sl4> hm, i suppose
57:00 <DHess_US> They use binders to increase thermal conductivity also so swap binders to a conductive one.
57:04 <T3sl4> well, electrical failure (increase of resistance, or broken connection) can occur if the resin fraction expands too much, without having an outright mechanical failure
57:12 <DHess_US> hehe, even carbon would work as a conductive binder.
57:42 <T3sl4> i wonder if silver strand or flake does better than dust
58:11 <DHess_US> Oh, I bet silver strands would.
58:51 <T3sl4> also wonder if there's a production method for strands..
58:53 <Ampera> well tomorrow I get to see if my remote access VM can be remotely accessed using chickenshit internet
59:10 <T3sl4> guess you can always make silver wool the same way it's made from steel
59:20 <DHess_US> If there is the hybrid guys would know. Silver ink hybrid construction is still a thing.
59:47 <DHess_US> What would be clever is a chemical way to make silver strands.
01:06 <T3sl4> carelessly plating silver out of a nitrate solution seems to make some pretty fine crystals, i wonder if that would do, given a little ball milling
02:20 <DHess_US> Silver is pretty malleable. I suspect ball milling silver crystals would smear them but maybe that isn't a bad thing.
02:39 <DHess_US> It isn't like ball milling to make German aluminum.
03:02 <T3sl4> you'd end up with flake again, but it might be more swordlike than paperlike
03:40 <DHess_US> I wonder what silver flake does in pyrotechnics.
04:06 <DHess_US> The same trick for aluminum might work with silver, include carbon black.
04:57 <T3sl4> silver does absolutely nothing, but silver oxide would be interesting
04:59 <DHess_US> Doesn't precipitated silver powder tend to rapidly oxidize? I never worked with it.
05:05 <T3sl4> it might be dangerous just to ball mill it in the first place..
05:17 <DHess_US> It's dangerous to ball mill aluminum.
05:18 <T3sl4> copper does, not silver AFAIK
05:31 <T3sl4> milling silver oxide, that is
06:13 <DHess_US> The Elemental Maker guy on YouTube did a bunch of videos on how to ball mill aluminum to make German aluminum or aluminum flake.
07:26 <T3sl4> must be a bit unnerving, the first time you let it run too long without venting, and you hear the oxygen rush in as you open it
09:08 <DHess_US> Yep. Seems like you could build a vent and trap into the end of the container.
09:26 <DHess_US> So it is not completely sealed yet the aluminum dust cannot get out.
10:38 <DHess_US> The amazing thing about his videos was the part about the economics. It is strange to think that when you count the cost of the electricity, it is cheaper to buy the stuff in bulk off of Ebay.
12:04 <DHess_US> Which makes me wonder if most of the people who make it themselves are doing it so they don't get tracked considering what it can be used for.
12:35 <T3sl4> economy of scale is a crazy thing
12:35 <DHess_US> He also made videos about how to construct electrolytic cells to make chlorates and perchlorates.
13:05 <T3sl4> i still have some kg of those, which i estimate cost ca. $1/lb in electricity, not to mention labor in prep and purifying
13:52 <DHess_US> There the big cost would be buying potassium chloride.
14:26 <T3sl4> nah, i got a 30lb sack at walmart for under ten bucks
14:43 <T3sl4> i guess some people like a low sodium diet for their water softener
14:44 <DHess_US> Oh? What application do they intend it for?
14:55 <DHess_US> Oh, that makes sense.
15:45 <DHess_US> Potassium Permanganate is also used in some water softening systems. I don't remember the details.
15:47 <T3sl4> some kind of pressed briquette form, not crystals
15:57 <DHess_US> Yea.
15:59 <T3sl4> for cleaning filters i think
16:15 <T3sl4> had 5lb of that too, though i never got to use much of it
52:36 Join: Im ([email protected]) to #EEVblog
53:21 Quit: Im ([email protected]) Quit: http://www.kiwiirc.com/ - A hand crafted IRC client
54:10 * Halcyon licks T3sl4 
54:17 <Halcyon> Salty
55:19 * T3sl4 cries
55:33 <Halcyon> Sook
36:19 <Halcyon> Hey T3sl4...
36:26 <Halcyon> Answer me this...
36:31 <T3sl4> blue
36:50 <T3sl4> oh wait, you didn't say "questions three"
37:00 <Halcyon> I bought a 12v lead acid battery charger today (mainly for car batteries)
38:01 <T3sl4> you bought a transformer and diode
38:01 <Halcyon> This one has a regular mode and a "cold weather" mode (for under 20 degrees C) however the specs aren't specific about what that actually does. It just says at 12v it supplies 5 amps out. But it does have multiple stages of charging
38:27 <Halcyon> How/why would such a mode matter or exist?
38:28 <T3sl4> should be that it starts with lower current, and hopefully it's temp compensated, cuz batteries have a tempco
39:20 <Halcyon> So normal mode starts off with a higher current than the cold temp mode?
39:42 <T3sl4> probably
40:26 <Halcyon> Right
40:48 <Halcyon> Is it "better" just to use the colder mode anyway?
41:59 <T3sl4> does it not just auto select by temp
42:24 <Halcyon> No, you have the manually select the charging mode when you connect it
42:30 <Halcyon> It doesn't just automatically start
42:55 <Halcyon> It does also have a 6v mode
58:28 * orbii looks about
05:47 <Halcyon> Hey orbii
25:22 <orbii> hi
48:14 <steve30> hi
50:59 * steve30 makes coffee
Search this day's buffer: