// #eevblog — 2020-02-29
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00:01:13 Join: steve30 ([email protected]) to #EEVblog
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03:11:30 <Lemon> alright I just spent more than 1 hour cleaning those test leads with wd40
03:11:36 <Lemon> now it smells like shit but they are nicer
03:12:38 <K> feeling dizzy now?
03:12:55 <Lemon> not even !
03:13:12 <Lemon> they are not perfect but contacts are better
03:13:32 <Lemon> well 20 euros for 10 pairs of nice stackable leads, I wont bitch about it it was alright
03:15:46 <Lemon> I miss crocodile clips to plug on them and I'll be set on cables
03:22:41 <Lemon> I got a bunch of 555 timers today
03:22:44 <Lemon> what should I build ?
03:26:20 Join: Ysjoelfir ([email protected]) to #EEVblog
03:26:21 Quit: Ysjoelfir ([email protected]) Changing hosts
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03:26:30 <Ysjoelfir> Weekend!
03:28:01 <Lemon> yay :P
03:28:12 <Lemon> I got some 555 timers today, what should I build ? :P
03:28:45 <Ysjoelfir> oh! i have a great idea!
03:29:03 <Lemon> not too hard please :>
03:30:35 <Ysjoelfir> https://www.eevblog.com/forum/repair/searching-for-ic-from-thermohygrograph-unknown-timer-pulse-generator/msg2700444/#msg2700444
03:30:42 <Ysjoelfir> find a solution for that old project of mine
03:31:11 <Lemon> the name doesnt sounds too easy xd
03:32:52 <Lemon> I was more alooking for something to learn the basics of a 555 :P
03:35:17 <rust_collector> make an electric blip generator, with variable frequency, and constant duty cycle
03:36:00 <Lemon> lets do something easy to start
03:36:12 <rust_collector> make a led blink?
03:36:12 <Ysjoelfir> that should actually be pretty easy^^
03:36:17 <Lemon> first, da breadboard
03:36:51 <rust_collector> second, da bread
03:37:18 <rust_collector> then, butter and ham and cheese
03:37:41 <Ysjoelfir> great idea!
03:38:00 <rust_collector> Yes, I wish I had butter and ham
03:38:03 <Ysjoelfir> I have to find an idea what to do whith those things. https://www.dialog-semiconductor.com/configurable-mixed-signal
03:38:15 <K> do french even eat plain ham, cheese and butter?
03:38:59 <rust_collector> no, they have beurre and
03:39:01 <rust_collector> uhm
03:39:05 <rust_collector> someting
03:39:25 <rust_collector> they have no clue about cheese, so they would need some guidance there
03:45:35 <Lemon> ofc we eat cheese and butter
03:46:24 <rust_collector> you don't have real cheese
03:46:29 <rust_collector> butter, yes
03:46:50 <Ysjoelfir> Brunost is the only real cheese!
03:46:52 <rust_collector> and "cheese" that is not far from the same as old butter
03:47:01 <Ysjoelfir> Well, ok, maybe gammelost is also ok
03:47:03 <rust_collector> g35!
03:47:12 <rust_collector> no, it is not ok at all, lol
03:47:17 <Ysjoelfir> XD
03:47:28 <rust_collector> dad likes it
03:47:38 <rust_collector> I tried, but I just could not
03:48:27 <Ysjoelfir> I never tried gammelost
03:48:31 <Ysjoelfir> brunost was... meh
03:48:38 <Ysjoelfir> at least that one i tried
03:48:42 <Ysjoelfir> I assume there are many varieties
03:48:44 <rust_collector> there are several kinds of brunost
03:48:51 <Ampera> Ysjoelfir, liar, it's still friday
03:48:56 <Ysjoelfir> exactly!
03:48:57 <Ampera> and I'm still working q.q
03:49:02 <rust_collector> not in the real world
03:49:05 <Ampera> but my lunch break is in 10 minutes
03:49:37 <rust_collector> on monday, your lunchbreak and the weekend will feel like the same thing
03:49:39 <Ysjoelfir> I am kind of not working. I am at home, looking through a datasheet, thinking about a potential use I could make up for that stuopid IC to write an appnote and earn great $$$
03:52:57 <Ampera> I'm moving lines around on a map
03:53:01 <Ampera> and changing numbers on a screen
03:53:06 <Ampera> and then waiting for things to update
03:53:08 <Ysjoelfir> sounds like great fun!
03:53:37 <Ampera> nope
03:53:41 <Ampera> but about to go on a walk with my dad
03:53:43 <Ampera> so that is fun
03:53:57 <rust_collector> I wonder if the dcc send thing works at all, or if people just know what I am trying to send
03:59:49 <rust_collector> https://imgur.com/gteNvMs
04:00:01 <Lemon> it failed
04:00:19 <Lemon> hoooo nice
04:00:53 <Ysjoelfir> where is that?
04:04:47 <rust_collector> https://www.google.com/maps/@59.4500873,8.7061242,393m/data=!3m1!1e3?hl=no
04:24:29 Quit: AndrevS ([email protected]) Quit: Leaving
04:25:50 <Lemon> weee I got a blinky led with a trimpottt
04:25:58 <Lemon> am I en engeener now ?
04:26:04 <Lemon> an ingenieur
04:26:16 <rust_collector> sorry, you are overqualified, so we can not hire you
04:26:47 <Lemon> shit, everitiem
04:27:25 <rust_collector> so, scope the output on one channel, and the cap on the other?
04:27:36 <rust_collector> because I assume you used a cap?
04:35:58 <Lemon> two caps yeah
04:36:03 <Lemon> lemme try the hp scope for once
04:37:21 Join: TK0130 ([email protected]) to #EEVblog
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04:39:31 <Lemon> hmmm he cant trigger it seems
04:39:57 <Lemon> I see some spikes
04:40:57 <rust_collector> mess with the trigger?
04:41:29 <Lemon> man its the most complicated thing ever
04:41:37 <Lemon> having a display is already hard yu know
04:45:04 <Lemon> lets see what the good ol tek sees
04:45:29 <rust_collector> YES!
04:45:46 <rust_collector> or any other sane scope
04:46:57 <Lemon> it seemsto be a square wave but not repetitive enough to be seen properly
04:47:21 <rust_collector> where? and what circuit did you use?
04:47:43 <Lemon> on the cap its kinda triangular
04:47:51 <Lemon> a regular 555 timer blinky led circuit
04:47:53 <Lemon> nothing fancy
04:48:00 <Lemon> https://www.instructables.com/id/555-IC-Intro-Flashing-LED/
04:48:44 <rust_collector> right
04:49:05 <rust_collector> see how slow you can make it blink
04:50:38 <rust_collector> ploink a bigger cap in it, if you have to
04:50:53 <Lemon> ho I can make it blink kinda slow
04:50:59 <Lemon> but its not a stable signal you know
04:51:06 <Lemon> a storage scope would help I guess
04:51:39 <rust_collector> does it go more or less stable if you play with the voltage?
04:52:21 <Lemon> nope because it slowly rise, then pop on, pop off, slowly rise again etc
04:52:27 <Lemon> so it gives shit on an analog scope
04:52:35 <Lemon> as it can get repetitive waveforms only
04:53:45 <Lemon> if I put the sec/dic to like 20ms I can see its vaguely a square wave
04:54:33 <Lemon> on the cap I can see a triangular waveform
04:54:35 <Lemon> well kinda
04:55:38 <rust_collector> yeah, so now you know how a 555 works
04:55:53 <rust_collector> now, try to use it to blink a motor
04:56:23 <Lemon> on the led I can see the square wave, its not totally square
04:56:30 <Lemon> when I put like 50ms in division
04:57:00 <Lemon> I see it thanks to the persistence of the phosphor
04:57:05 <Lemon> or whatever is in the crt
04:57:57 <rust_collector> can you see about what voltage on the cap, the led turns on and off?
05:01:36 <Lemon> the hp got trouble to trigger idk why
05:03:05 <Lemon> hmmm so playing with some options I can see something
05:03:36 <Lemon> on the led I can clearly see a square wave with some noise, spikes idk what
05:07:31 <Lemon> im trying to find how to move the waveform
05:07:35 <Lemon> from up to down
05:07:38 <Lemon> yes, its that complicated
05:16:01 <rust_collector> eeh, have fun
05:16:16 <Lemon> I found out how to manually trigger it
05:16:21 <Lemon> but I cant move the goddamn thing
05:25:25 <Lemon> seriously I dont get it, its not even stated in the manual
05:25:37 <Lemon> dont tell me you cant move up or down the waveform like a good ol analog scope
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05:43:49 Mode: (by ChanOP) +o ThunderSqueak
05:49:13 <rust_collector> I am not saying you cant move up and down the waveform like a good ol analog scope
05:50:30 <DHess_US> Wait, what? https://twitter.com/RNCResearch/status/1233443691546714113
05:53:16 <rust_collector> why wait? just what?
06:04:53 <Lemon> well I learnt some nice things on the scope, like getting a single shot, analyze it etc
06:05:01 <Lemon> but I cant find how to move up and down waveforms
06:06:45 <rust_collector> use the scroll wheel
06:07:06 <Lemon> its built like a computer
06:07:16 <Lemon> you even get to use a shift key
06:12:23 <rust_collector> oh great....
06:12:43 <rust_collector> do you configure the thing in elisp?
06:13:48 <Lemon> elisp ?
06:14:16 <rust_collector> so, I guess not
06:14:28 <Lemon> nah you just have a shitton of options for everything
06:14:47 <Lemon> you even have a 'don't care' button man
06:14:55 <rust_collector> who cares?
06:15:22 <Lemon> heh true
06:17:55 <rust_collector> https://www.youtube.com/watch?v=LQhX8PbNUWI
06:21:06 Quit: Ysjoelfir ([email protected]) Connection closed
06:21:27 <rust_collector> ysjoelfir does not care
06:32:27 <Ampera> only 2.5 hours of working left
06:32:30 <Ampera> then I have weekend
06:33:28 <DHess_US> https://pbs.twimg.com/media/ER3pOBqXsAEl0Tm?format=jpg&name=small
06:34:24 <rust_collector> I got a nice 4 hours of overtime today. most of it was spent waiting for a forklift to cool down enough that it would start, lol
06:35:44 <DHess_US> Why is that necessary?
06:37:02 <rust_collector> to get loaded, so I can go home?
06:38:12 <DHess_US> No, I mean why won't it start before it cools down? That doesn't seem normal.
06:38:29 <DHess_US> https://pbs.twimg.com/media/ER3-HAgWoAUiybV?format=jpg&name=small
06:39:27 <rust_collector> computer shuts it down, when it thinks it is overheating
06:40:25 <DHess_US> Is it overheating?
06:45:46 <rust_collector> nope
06:46:15 <rust_collector> it is just overengineered, and the service guy has no clue
06:47:07 <rust_collector> it is a linde, they were sold to toyota, and some other company, so now the toyota service people have to figure out what they are.
06:53:15 <Lemon> just pee on it to cool it down
06:53:29 <rust_collector> sure, but it is not hot
06:54:53 <rust_collector> And, I did not have anything to do, so I am ok with chatting to some people, and drinking coffee for an hour or two, while getting paid overtime
06:55:20 <Lemon> I admit thats alright
07:24:05 <Lemon> I think I'll take a look at the hp scope and see if reseating boards change something
07:34:29 <Lemon> even taking it apart is complicated
07:34:29 <Lemon> ffd
07:35:44 <rust_collector> can you put the damn thing on fire?
07:35:54 <rust_collector> nooo, doesn't work
07:36:06 <Lemon> too complicated
07:37:24 <rust_collector> sorry, but you need the properly configured plugin module to put this device on fire
07:56:31 <Lemon> well I have to remove bnc inputs
07:56:35 <Lemon> and I dont have the right tool
08:11:05 <Lemon> well I put it back, I dont have the right tools and I dont want to damage anything
08:11:14 <Lemon> but reseating it wont do shit I think, looking at the type of connector
08:12:08 <rust_collector> can you just wiggle the cards a bit? without completely taking them out
08:12:37 <rust_collector> or, leave it alone, and wait until you go to hp skool
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08:15:53 <Lemon> impossible
08:15:58 <Lemon> its so well made and secure, that simpressive
08:16:18 <Lemon> you understand why this thing costed 9.9k dollars 30 years ago or so
08:17:30 <Lemon> even to remove covers, theres only one screw, and when you unscrew it the back cover moves backward
08:17:36 <Lemon> thats well made
08:22:04 <Lemon> one day I'll try to fully disassamble it, first to clean keyboards contacts because they are a bit wonky, and to see if theres an apparent failure
08:22:12 <Lemon> but I dont think so, its so complicated, it can be anything
08:25:06 <Lemon> maybe its the infamous nvram chip
08:58:19 <Lemon> so on the scope whats failing on channel 1 is the offset and gain cal
08:58:28 <Lemon> hysteresis and trigger passes
08:58:37 <Lemon> doesnt help me a lot but well
09:20:17 <Halcyon> Morning all
09:20:36 <rust_collector> evening you
09:20:44 <Halcyon> :)
09:39:38 Join: Ysjoelfir ([email protected]) to #EEVblog
09:39:38 Quit: Ysjoelfir ([email protected]) Changing hosts
09:40:09 <Ysjoelfir> hi
09:40:36 <rust_collector> are you getting banned again?
09:41:30 <Ysjoelfir> nope, but simmilar. the girlfriend demanded me to go shopping with her
09:45:14 <Ysjoelfir> I am also very dissappointed from her. She didn't know Wulle Beer! And also not Fiege and Faxe!!!
09:45:55 <rust_collector> good good
09:46:25 <rust_collector> there was, or is a thing called faxe lut
09:46:45 <rust_collector> I do not think you would want to drink it
09:48:13 <Ysjoelfir> I was more talking about Faxe Premium from the Faxe Bryggeri in denmark ;)
09:48:20 <Ysjoelfir> https://www.bierkreiszeichen.at/images/bierpics/1/1716.jpg?v=1381144534
09:48:39 <Ysjoelfir> they understand what a useable size for a beer can is
09:54:23 <T3sl41> Ysjoelfir: https://farm1.staticflickr.com/162/373380681_395e41349e_z.jpg
09:54:30 <T3sl41> *beerish hugs*
09:54:38 <Ysjoelfir> well, thats also good :)
09:54:50 <Ysjoelfir> but I don't like heineken
09:56:04 <T3sl41> i don't get it too often, but the packaging came to mind :)
09:56:30 Quit: AndrevS ([email protected]) Quit: Leaving
10:15:36 <Lemon> hey Ysjoelfir ! do you have any idea about the hp 54201D channel 1 gain and offset failing ?
10:15:54 <Lemon> im raiding the net to find some infos of similar problems
10:15:59 <Lemon> without much chances
10:17:04 Nick: T3sl41 is now known as T3sl4
10:18:14 * T3sl4 raids Lemon's limonenic visage
10:20:13 <Lemon> D:
10:20:46 <T3sl4> squeaky clean :))
10:24:05 <Halcyon> Hmm
10:24:10 <Halcyon> Part of me wants to install this: https://winworldpc.com/product/banyan-vines/8x
10:26:33 * T3sl4 hugs Halcyon
10:26:37 <Halcyon> :)
10:26:58 <Halcyon> I need to work out why my coffee machine no longer heats
10:27:19 <T3sl4> D:
10:27:39 * T3sl4 rubs a steve30 against it, in the hopes that the kittywarmth or ESD helps
10:27:49 <Halcyon> It tries, but then it times out and I get a "General Alarm"
10:28:08 <Halcyon> It did it intermittently for a few months, but power off/on usually fixed it. Now it's all the time
10:28:57 <T3sl4> sounds like it's too smart
10:29:12 <Halcyon> It's one of those it does everything, grinds, froths milk etc...
10:29:21 * T3sl4 slaps Halcyon with a ludditefish
10:29:25 <Halcyon> To be fair, I think the cup count it up to something like 3000
10:30:28 <rust_collector> I think your coffee machine was designed by a german company that also produce forklifts
10:30:46 <Halcyon> It's a DeLonghi machine
10:31:00 <Halcyon> Some have suggested a triac inside goes bad
10:31:07 <Lemon> godamn forklift
10:31:27 <Halcyon> Although it doesn't heat *at all* so maybe a fuse?
10:32:07 <rust_collector> I think it needs a quick visual inspection
10:32:19 <Halcyon> Yeh I need to pull it apart, might do that today
10:32:21 <T3sl4> klaus coffee maker?
10:32:26 <Halcyon> Not sure what I'm looking for though
10:32:58 <rust_collector> if the pcb is dark brown around some component, and... other things, I guess?
10:33:16 <Halcyon> How would I measure if the heating element is good?
10:34:15 <rust_collector> I would think it is just a resistive thing, so measure resistance? I would think they could burn off, and go open?
10:34:39 <T3sl4> that, or go short, and there should be a fuse (thermal fuse?) that subsequently burns open
10:34:54 <Halcyon> I doubt it's the elements. They wouldn't cause an intermittent failure would they?
10:35:16 <rust_collector> I guess they could do weird things, if they move a bit, maybe
10:36:04 <Halcyon> I might look at the triac first. It seems to be a "common" culprit with this machine
10:36:15 <rust_collector> if it has continuity, try to fry it with your own power supply?
10:36:16 <rust_collector> ok
10:36:38 <Halcyon> Can I test a triac with a multimeter or do I need something special?
10:36:56 <T3sl4> triac most likely fails shorted
10:37:06 <T3sl4> open likely with physical damage apparent
10:37:14 <Halcyon> Okies I'll check it out
10:37:19 <T3sl4> G to T2 should be diode both ways
10:37:27 <T3sl4> T1 to (T2 or G) open
10:37:35 <Halcyon> Copy
10:38:06 <Halcyon> If it is shorted, is that a sign of a bigger design issue or maybe just a cheap part?
10:38:55 <EEVBlog> New EEVBlog Tweet: NEW EEVblog Video! eevBLAB #71: Audience Retention + My Editing Process https://t.co/eo2ogUJj0A
10:39:16 <rust_collector> maybe it just sits inside a coffee maker, getting roasted
10:40:48 <Halcyon> Maybe I just buy a new machine, a simple one with a pump that pumps coffee through a group head.
10:40:54 <Halcyon> None of this fancy automated shit
10:41:03 <Halcyon> *water
10:41:16 <rust_collector> nah, take a look inside it. it could be something easy
10:41:51 <rust_collector> Oh, I mean, yes, you should get a new one (you are looking for a reason to buy a new one, right?)
10:41:56 <Halcyon> Heh
10:42:01 <Halcyon> Well it is a bugger to clean
10:42:16 <Halcyon> And I drink my coffee black anyway, so I have no need for half the features
10:42:38 <T3sl4> i would air on the side of, underrated part or poor design, but tbh i don't know too much about triac failure modes so ymmv
10:42:57 <EEVBlog> New EEVBlog Tweet: Youtube creators: If you see this comment in your videos from "Trap xxxx" (many variants in the name) it's a scam, they are trying to take control of your channel. Report the spam. Search for "Trap Town Scam" on youtube. https://t.co/48GvVEBhYO
10:43:22 <T3sl4> should be that e.g. surges just get passed on through for a cycle or two (turning on the heater erroneously), but maybe the rapid turn-on and surge current causes failure for example, idunno
10:43:45 <Halcyon> Sounds good :)
10:45:21 <rust_collector> I use these: https://www.moccamaster.eu/webshop/brewers_with_eu_plug/kbg_select_eu_plug_in_21_colors/
10:46:09 <Halcyon> Not a fan of drip coffee
10:46:22 <rust_collector> it does nothing other than giving me a jug of coffee in 6 minutes
10:47:01 Quit: Ysjoelfir ([email protected]) Connection closed
10:53:35 <T3sl4> drip, ugh
10:54:21 <T3sl4> another of the many travesties we tolerate on a daily basis in the US
10:55:08 <Halcyon> Drip coffee is kind of rare here
10:55:12 <Halcyon> Unless it's cold brew
10:55:26 <Halcyon> Espresso is everywhere
10:55:40 <Halcyon> Or many people just use instant coffee which is bleh
10:57:34 <T3sl4> instant coffee from metallized packets is head and shoulders above drip
10:58:03 <T3sl4> i don't particularly care for a drip machine, nor any of the fancier, more manual kinds; i actually prefer packets
10:58:26 <T3sl4> instant granules from a jar actually manage to be worse than drip tho
10:58:39 <rust_collector> some instant stuff is pretty ok
10:59:04 <EEVBlog> New EEVBlog Retweet: Modus Pwnens: @eevblog This 1024 (1k) vid got promoted to me by the algorithm. I thought there was absolutely no way it'd compile! https://t.co/AQyWoKENYn
10:59:16 <rust_collector> well, good night and stuff
10:59:16 <Halcyon> T3sl4: Freeze dried coffee in a jar is what we refer to as "instant"
10:59:20 <Halcyon> It's basically muddy water
10:59:38 <Halcyon> I refuse to stoop to that level, I'll have tea instead
10:59:40 <rust_collector> yes, nothing like the roasted bean tea you like
10:59:42 <T3sl4> angry muddy water, it makes your bowels move but doesn't please your brain
10:59:42 <Halcyon> Night rust_collector
11:00:00 * T3sl4 sprinkles assorted oxides on rust_collector
11:00:09 <Halcyon> Well the first coffee of the day makes me poop anyway
11:00:16 <Halcyon> Kicks the bowels into gear
11:01:17 <Halcyon> Also T3sl4, what the fuck is wrong with you Americans? https://youtu.be/0ZxdBPMW-8w?t=287
11:01:33 <Halcyon> What the bloody hell is that monstrosity ?
11:01:43 <T3sl4> is this guy an american?
11:01:45 <Halcyon> I cannot imagine it would be in any way good
11:01:46 <T3sl4> human, even?
11:01:57 <Halcyon> American, yes. Human *shrug*
11:02:05 <EEVBlog> New EEVBlog Retweet: #Australia :Which was quoting: CBS News: ODDLY SATISFYING: Team of vets pull AN ENTIRE BEACH TOWEL out of a python in Australia – with their bare hands. https://t.co/rjzR2lrmEW
11:02:10 <Halcyon> I think he is a bit Aspie
11:03:13 * Ampera hugs Halcyon
11:03:22 <Halcyon> YAY! Ampera
11:03:27 <Ampera> how are you fren
11:03:35 <Halcyon> I'm good, relaxed. How was work?
11:03:38 <rust_collector> I once discovered that fries and ice cream tastes like cheap biscuits, so some things that are wrong, work out ok.
11:03:40 <Ampera> blech
11:03:44 <rust_collector> hey Ampera
11:03:48 <Ampera> hi rust_collector
11:03:48 <rust_collector> bye Ampera
11:03:53 <Ampera> bye rust_collector
11:04:01 <rust_collector> and now, good night, again
11:04:06 <Ampera> good night rust_collector
11:04:19 <Ampera> Halcyon, my PineTime shipped
11:04:29 <Halcyon> YAY!
11:05:34 <Halcyon> I'm selling my 8MB Voodoo2 card I bought in 1990
11:05:36 <Halcyon> 1998
11:05:51 <Halcyon> I have 3x 12 MB cards
11:05:53 <Ampera> how much do you want for it
11:06:04 <Halcyon> You're interested?
11:06:09 <Ampera> absolutely
11:06:23 <Halcyon> Well they normally go for around AUD$200, so half that?
11:06:42 <Ampera> how much do you want for shipping
11:06:53 <Halcyon> Standby, Ill calculate
11:08:26 <Halcyon> It will be AUD$32.70 up to 1 KG or $56.40 between 1-2 KG
11:09:04 <Ampera> What about 120 AUD in total
11:09:14 <Halcyon> Sure, only because it's you
11:09:41 <Ampera> Would you want that in USD equivalent or in AUD
11:09:50 <Halcyon> Does it matter?
11:10:02 <Ampera> One is cheaper for me, whichever one you want I will pay.
11:10:31 <Halcyon> I don't care?
11:10:44 <Ampera> well I'd presume I'd be sending you this via paypal
11:10:46 <Ampera> alright
11:11:12 <Halcyon> I need to find that short little D-SUB cable that goes between the 2D and Voodoo card
11:11:30 <Ampera> alright, if you absolutely can't find it it's not a huge deal
11:12:02 <Halcyon> I think I know where it is
11:12:14 <Ampera> is 85 USD an acceptable amount
11:12:36 <Halcyon> Otherwise I have heaps of male to male cables of similar length, so you would just need a gender changer (no pun intended)
11:12:49 <Halcyon> Yeh that's fine
11:12:53 <Ampera> I have a cable for my Voodoo 1, and a gender changer or two
11:13:02 <Halcyon> As long as it covers shipping and a little on the side given the value of it
11:13:20 <Ampera> It should be a bit more than 120AUD
11:13:26 <Halcyon> It's a 3Dfx reference design too, so drivers are easy
11:13:47 <Ampera> PM me your last name
11:14:26 <Ampera> 85USD for this transaction, last call, make any final checks
11:14:33 <Halcyon> Nope, that's fine
11:14:50 <Halcyon> I would rather see you get enjoyment out of it, than make money off some random on ebay
11:15:25 <Ampera> https://prnt.sc/r9aia1 This might be a problem
11:15:48 <Halcyon> Whaa!?
11:16:01 <Ampera> I hope you don't intend longer than a lifetime
11:16:18 <Ampera> * to live longer
11:16:29 <Ampera> for whatever reason lately I've been forgetting entire words within sentences
11:16:33 <Halcyon> I wonder if that limit applies to ebay?
11:16:41 <Halcyon> So if I set up a listing and you just buy it now?
11:16:47 <Ampera> presumably, so don't make any purchases while you're dead
11:22:14 <EEVBlog> New EEVBlog Retweet: Richard Dawkins: Freeman Dyson, the great theoretical physicist, mathematician and contrarian has died, aged 96. https://t.co/Gt3doVQcuh
11:52:35 * Halcyon handles Ampera's package
11:52:51 <Halcyon> It's not as hefty as I imagined
11:54:20 <Halcyon> Back shortly, loading the dishwasher
11:56:29 <EEVBlog> New EEVBlog Tweet: Someone was poking around this old PC in the dumpster, and decided, nah, bugger it. Nothing missing. Not exactly cutting edge stuff... https://t.co/HoCQLR7deN
12:22:36 * steve30 cuddles Halcyon
12:23:04 <Halcyon> Hey Steve :)
12:26:45 * Ampera cuddles Halcyon
12:26:49 <Halcyon> :D
12:30:21 <steve30> i think i'll go back to bed
12:30:33 <Halcyon> Naww
12:38:39 Quit: ThunderSqueak ([email protected]) Quit: Leaving
12:38:47 <Ampera> Halcyon, https://www.youtube.com/watch?v=_p52QJi-Ydo
12:47:48 <EEVBlog> New EEVBlog Retweet: RobotGrrl 👾: Unsure how the magic smoke was released from these electronics... 😁 #electronics https://t.co/BXJukcd5jB
12:54:12 <Lemon> my tooth hurts so much
12:54:16 <Lemon> when will fucking ends
12:54:22 <Lemon> its been like two months
13:01:03 <Halcyon> Yeh I've seen it Ampera
13:01:06 <Halcyon> It's stupid
13:06:55 <EEVBlog> New EEVBlog Tweet: https://t.co/MrxvDPJskB FYI: SonicEnergy are uBeam https://t.co/cGvI2B4kg9
13:49:38 Quit: Lemon ([email protected]) Connection closed
14:03:40 Quit: MrMobodies ([email protected]) Ping timeout: 121 seconds
14:03:50 Join: MrMobodies ([email protected]) to #EEVblog
15:06:21 <DHess_US> https://www.awesomeinventions.com/tiny-pizza-table-and-chairs/?fbclid=IwAR0bMQS716OiqMyW_nW3wO197aSRESUGjPhwLB6DFVfSG3I5bZXMsur1xdY
16:07:17 <Halcyon> Heh, cute
17:11:06 <Halcyon> Hey Ampera, you arond?
17:11:08 <Halcyon> around
18:06:30 <steve30> hi
18:06:38 <Halcyon> Hey Steve :)
18:07:28 * steve30 woke up
18:14:26 <steve30> I might get someone in to give me a quote for some air conditioning in the next couple of weeks
18:26:15 <Halcyon> :)
18:39:46 <steve30> i think i should have more coffee
19:28:00 Join: AndrevS ([email protected]) to #EEVblog
19:28:31 * steve30 wonders if Halcyon watches DIY Perks on youtube
19:56:37 <EEVBlog> New EEVBlog Tweet: I bet you didn't know Australia has a $5 coin https://t.co/WLgqiwLY1n
19:59:38 <EEVBlog> New EEVBlog Tweet: And a $10 coin https://t.co/YaR6ngmTR5
20:01:58 <steve30> I have a £10 coin and a £25 coin
20:06:41 <EEVBlog> New EEVBlog Tweet: Back when Sydney property was affordable. https://t.co/bowbusgZEQ
20:13:45 <Halcyon> steve30: I don't
20:14:32 <Halcyon> By the way, want to see a photo of me when I used to work in uniform?
20:14:38 <steve30> sure
20:14:41 <Halcyon> https://imgur.com/a/xPdQFNb
20:14:49 <Halcyon> (It was my birthday)
20:15:16 <steve30> The police have an interesting choice of hats :)
20:15:27 <Halcyon> Yeh, it's a requirement :P
20:15:38 <AndrevS> gehehe
20:15:55 <Halcyon> My hair is obviously all messed up in that picture, it's not normally that flat
20:16:26 * steve30 figured Halcyon might find DIY Perks guy cute
20:17:46 <Halcyon> Yeh he's alright
20:17:52 <Halcyon> I wouldn't kick him out of bed
20:18:44 <Halcyon> If I had to pick any Youtuber, it would be Mark Rober: https://www.youtube.com/watch?v=ugRc5jx80yg
20:18:48 <Halcyon> He is effing hawt
20:27:03 * steve30 has gone tired
20:27:10 * steve30 curls up on Halcyon's lap
20:37:43 * DogWomble drags himself in front of the compuiter
20:40:32 <AndrevS> hello
20:43:18 <DogWomble> hi AndrevS
21:39:44 Join: Lemon ([email protected]) to #EEVblog
21:39:53 <Lemon> heyyy
21:40:36 <AndrevS> hi
21:44:03 Join: Lemonizer ([email protected]) to #EEVblog
21:44:09 <Lemonizer> okkkk
21:45:56 Quit: Lemon ([email protected]) Ping timeout: 121 seconds
22:03:52 Join: Ysjoelfir ([email protected]) to #EEVblog
22:04:21 <Ysjoelfir> Hi all
22:04:57 <Ysjoelfir> Lemonizer, did you already see the newest Mr.Carlson video? you will love it
22:05:57 <Lemonizer> hi boi :> the great meter one ?
22:07:04 <Ysjoelfir> jo
22:07:21 <Lemonizer> it was interesting yes !
22:07:31 <Lemonizer> I think I need to watch the end
22:07:52 <Lemonizer> I spent a good 2-3 hours looking on a solution for the first channel of the hp scope
22:08:00 <Lemonizer> gain and offset fails
22:08:24 <Lemonizer> mamalala told me one day it was working, the next day nope
22:08:34 <Lemonizer> so its not something that fried while he was doing something
22:14:48 <Lemonizer> if you got any idea :>
22:17:47 <Ysjoelfir> nope, none
22:18:07 <Lemonizer> aww
22:24:37 <Lemonizer> ho hey
22:24:46 <Lemonizer> you know the bnc to double banana cable you gave me
22:24:56 <Ysjoelfir> i have heard of them, yes
22:25:02 <Lemonizer> can I use it to measure values from the waveform gen ?
22:25:24 <Ysjoelfir> depends? what values do you want to measure with what
22:25:25 <Halcyon> I'm off to bed guys
22:25:27 <Halcyon> Goodnight all
22:26:00 <Ysjoelfir> oh, halcyon :) hi and gn8
22:26:04 <Halcyon> :)
22:26:38 <Lemonizer> like the voltage output for example
22:27:17 <Lemonizer> with a random dmm
22:31:22 <Ysjoelfir> sure, that would work.
22:38:43 <Lemonizer> lets do it to test
22:38:53 <Lemonizer> I risk nothing by trying that ?
22:38:58 <Lemonizer> ho and it ouputs an ac voltage right ?
22:40:35 <Ysjoelfir> no. yes.
22:40:40 <Lemonizer> Id also love to get some sort of T to be able to read the frequency on the counter, and to ouput it on the scope
22:40:52 <Lemonizer> to make things simple
22:40:57 <Lemonizer> a dc voltage is always flat
22:40:59 <Lemonizer> right ?
22:46:39 <Ysjoelfir> well, basically yes. but there isn't any "real" DC volt as you have nearly always some AC components overlaid. but to make it easy: yes, DC is flat.
22:46:58 <Lemonizer> hmmm yes thats what I was thinking
22:47:05 <Lemonizer> so why we do the distinction ?
22:47:17 <Lemonizer> if in practice thats impossible or almost to get a DC voltage
22:48:46 <Lemonizer> seems a sinewave without any attenuation is around 8V something
22:48:49 <Lemonizer> no matter the freq
22:49:02 <Ysjoelfir> because for many applications it is enough like that^^
22:49:22 <Lemonizer> but but
22:49:27 <Lemonizer> you know scientists
22:49:31 <Lemonizer> they like to split hairs :>
22:49:43 <Ysjoelfir> sure.
22:49:48 <Lemonizer> at what level we call it a DC ?
22:49:58 <Ysjoelfir> depends on what you are measuring
22:50:01 <Lemonizer> like, how flat it needs to be ?
22:50:15 <Ysjoelfir> ok, lets start this a bit different
22:50:37 <Ysjoelfir> if I have a DC supply with 200mV AC ripple... is that AC or DC?
22:50:50 <Ysjoelfir> lets say the DC is 10V
22:50:50 <Lemonizer> AC ?
22:50:59 <Ysjoelfir> so it is wiggling between 9.8 and 10.2V
22:51:00 <Lemonizer> I mean its not flat
22:51:09 <Lemonizer> it can be flat enough for something
22:51:13 <Lemonizer> but on the paper its not DC right ?
22:51:26 <Ysjoelfir> but don't I always have at least a flat 9.8V?
22:51:34 <Ysjoelfir> isn't that DC?
22:51:47 <Lemonizer> hmmmm
22:52:08 <Lemonizer> so lets say we have a 1V DC supply
22:52:31 <Lemonizer> if it goes from -0.1V to +1V
22:52:36 <Lemonizer> thats not DC anymore right ?
22:52:55 <Ysjoelfir> no
22:53:04 <Lemonizer> so as long as its always positive
22:53:09 <Lemonizer> thats considered as DC ?
22:54:24 <Ysjoelfir> many would agree, some wouldn't. I would say: as long as it doesn't CHANGE polarity it's at least not a pure AC
22:54:35 <Ysjoelfir> as it has an DC offset
22:54:52 <Ysjoelfir> and as long as it does have any kind of variance in it it isn't a pure DC as well
22:55:19 <Ysjoelfir> so most of the time you are dealing with mixed voltages, comprised of an AC part that is offset by a DC part
22:55:38 <Lemonizer> ok I get it :>
22:55:42 <Lemonizer> thanks teacher !
22:55:55 <Lemonizer> things like that helps me a lot to get over simple things
22:56:12 <Ysjoelfir> the magnitude of those parts is what makes it interesting and tells you if you are looking at an AC or DC voltage. like if your signal is the saiud 10V + 200mV ripple, we can assume that we are mostly interested in the DC part
22:57:14 <Lemonizer> yeah ok ! I see :>
22:57:30 <Lemonizer> that explains a lot of things
22:58:22 <Lemonizer> also, if I want to roughly see how stable a psu is
22:58:33 <Lemonizer> can I hook one output directly to a scope ?
22:58:48 <Ysjoelfir> depends on some factors
22:58:56 <Lemonizer> well maybe not its stability, its noise
22:59:08 <Ysjoelfir> if the PSU is isolated from mains and the amplitude doesn't exceed the scopes maximum input voltage - yes.
22:59:27 <Ysjoelfir> *PSU output. not the whole pcu ofc
22:59:37 <Lemonizer> yes psu ouput
22:59:46 <Lemonizer> like one of mine, 32v DC supplies
22:59:55 <Lemonizer> my tek is like max 400v PP
23:01:58 <Lemonizer> and btw, what exactly does an isolation transformer like yours ?
23:02:22 <Lemonizer> thats to avoid big voltage fluctuations or something ?
23:02:55 <Ysjoelfir> well.... to say it very very simple: it allows you to stick your finger into the isolated mains outlet without getting a shock
23:03:12 <Ysjoelfir> but dont try that with both poles at the same time, that will still shock you
23:04:08 <Ysjoelfir> the reason for that is: you isolate whatever you plug into the isolation transformer from the mains potential. so the current doesn't have a path to flow through your body to ground and close the circuit
23:04:31 <Lemonizer> hooo alright so its more to protect you than devices
23:04:45 <Lemonizer> thats why we use it a lot for old devices, where sometimes the chassis is hot
23:04:51 <Lemonizer> because of lack of grounding
23:05:23 <Ysjoelfir> exactly.
23:05:38 <Ysjoelfir> it CAN help in measurement, but it doesn't necessarily has to.
23:06:18 <Lemonizer> I'd like to find something to reduce mains variations, something affordable :>
23:06:23 <Lemonizer> I feel it could help
23:06:33 <Lemonizer> even if the electrical installation here is pretty nice
23:06:50 <Ysjoelfir> don'T bother :) we don't live in 1940 anymore ;)
23:07:20 <Lemonizer> yeah but for precision measurements, cant it play ?
23:07:50 <Lemonizer> for example on my psu I can see a fluctuation when something gets switched up/off :>
23:09:35 <Ysjoelfir> sure it can. but is it especially neccessary?
23:10:33 <Lemonizer> but muh stability bruhhh
23:10:42 <Lemonizer> haha no its def not neccessary :>
23:10:50 <Lemonizer> but I like to optimize things if its doable !
23:11:01 <Lemonizer> by doable I mean affordable
23:11:04 <Ysjoelfir> I totally understand that^^
23:11:52 <Lemonizer> I think I'll try to find some galvanometers for the variac :>
23:11:56 <Lemonizer> that or a led display
23:12:01 <Lemonizer> but galvanometers would be so nice
23:12:58 <Ysjoelfir> you know, I showed you the sweet little 5500VA isolation transformer. It wouldn't have been necessary to use that teeeny tiny little tranny. The isolated variac would be perfectly suitable with it'S 500VA, but hey. Who doesn't want to have his while desk on an isolation tranny?
23:13:45 <Lemonizer> haha ofc :P I'd love to see how big is it, inside its box !
23:14:46 <Ysjoelfir> it more or less fills the whole box. i built the box pretty much tightly around it, only to the front is around 5cm space for the switch on current limit and the mains outlet, meter and buttons
23:14:57 <Ysjoelfir> and it is H E A V Y
23:15:01 <Lemonizer> :O
23:15:06 <Lemonizer> like what, 40kg + no ?
23:15:11 <Lemonizer> thats a huge boi !
23:15:12 <Ysjoelfir> way more
23:15:17 <Lemonizer> D:
23:15:17 <Ysjoelfir> you can't carry it alone
23:15:32 <Ysjoelfir> when I lifted it into the volvo the car was like "dafuk dude!?"
23:15:36 <Lemonizer> big boyboi !
23:15:42 <Lemonizer> haha !
23:15:54 <Lemonizer> I was wondering
23:16:07 <Lemonizer> if I want to build a HV psu, with a small amperage
23:16:16 <Lemonizer> can I use a microwave transfo ?
23:16:25 <Lemonizer> those go like 2.5kv I think
23:17:26 <Ysjoelfir> well... you could. but for your own safety, don't think in those regions yet :)
23:17:39 <Lemonizer> yeah ofc !
23:21:18 <T3sl4> i made a <10mA variable DC-DC for that kind of thing
23:21:26 <T3sl4> still enough to be dangerous, but not toooo dangerous
23:21:39 <Lemonizer> at which voltage ?
23:22:31 <T3sl4> 300-2000V DC
23:22:47 <Lemonizer> pretty nice !
23:22:56 <T3sl4> https://www.seventransistorlabs.com/Images/HVPower1.png https://www.seventransistorlabs.com/Images/HVPower2.jpg
23:23:43 <Lemonizer> thats neat !!! I really need to build a simple psu, to learn things
23:24:20 <Ysjoelfir> I should finally find the time to repaid that 7500V PSU I have flying around...
23:24:27 <Ysjoelfir> or... better: to enhance it
23:24:28 <Ysjoelfir> it works
23:24:34 <Ysjoelfir> but only at 2000V
23:24:56 <Lemonizer> the big boi on top of the shelf ?
23:25:16 <Ysjoelfir> the other stages (it works basically with voltage doublers, switched with HV relais) aren't populated on the board and the selector switch isn't there
23:25:25 <rust_collector> if it is on top of a shelf, it is not a big boi
23:25:29 <Ysjoelfir> I have the relais and stuff, but.
23:25:47 <Ysjoelfir> no, not that one. that one is a simple dual 0-30V my dad once build. I have to fix that, too
23:26:06 <Lemonizer> ho ok :>
23:27:09 <Lemonizer> id love to find the manual for the systron donner
23:27:13 <Ysjoelfir> i have to admit that I don't realy know where I have put that HV thing...
23:27:17 <Lemonizer> I cant find it, its for sale on some places but I refuse to buy it
23:28:16 <Lemonizer> im trying to keep every manuals in a folder
23:29:52 <Lemonizer> if I could adjust roughly the 10v range that would be perfect
23:29:58 <Lemonizer> 23mv offset is big
23:58:17 <EEVBlog> New EEVBlog Retweet: You Had One Job: What are the odds? https://t.co/R6ABYe7qTZ
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