// #eevblog — 2025-09-24
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00:50:30 Join: Kuschelpony ([email protected]) to #EEVblog
03:10:55 <MrMobodies> https://www.eevblog.com/forum/chat/why-do-people-still-use-conventional-current-notation/msg6047287/#msg6047287
03:10:56 <EEVBot> [url] Why do people still use conventional current notation?. - Page 1 | www.eevblog.com
03:11:09 <MrMobodies> " no one actually cares that the moving charge is negative and flow the other way"
03:11:34 <MrMobodies> I actually heard someone challenge a science teacher at a school in 2000 about this
03:12:02 <MrMobodies> the teacher agreed, he said he believed that it was presented like that to make it easier to understand
03:16:19 <MrMobodies> I thought the electrons bounce in the metal back and forwards
03:17:15 <MrMobodies> reminds me a bit like a vacuum in reverse to create an attraction
03:17:28 <MrMobodies> for it to move
03:20:45 <MrMobodies> So moving charge is actually negative in the direction of a positive attraction to create the flow?
03:21:53 <Kuschelpony> mmh see it as a convenient special case where current is equal to electron flow, in electrolysis of metal for examle current is positive ions moving actually from plus tominus
03:25:42 <flyback> <MrMobodies> I thought the electrons bounce in the metal back and forwards
03:25:44 <flyback> correct
03:27:03 <Kuschelpony> lets say they jitter around, bouncing off the vibrating (hot) metal atoms, and if you apply a voltage gradient the electrons show a bit overall movement
04:01:10 <flyback> I always wondered how they use electron microscopes without destroying the sample with high voltage
04:01:12 <flyback> turns out they don't
04:01:24 <flyback> the sample gets CANUCKED* EVERY TIME
04:01:37 <flyback> so like if you want to view the inside of a chip you are writing off that chip
04:05:06 <Kuschelpony> well, if you make a REM image of an organic sample, you usually dont even make the image of the sample but make a carbon deposit negative of the sample (similar to nanometer scale plaster bandage modelling)
04:05:23 <Kuschelpony> eh in american translation SEM
04:06:05 <Kuschelpony> its also an anaysis method of its own to scan the actual sample and measure its decay from scan to scan
04:07:31 <Kuschelpony> about chips, i have heard of imaging techniques where you brake the electron beam back to single volts i a reatrding field above the chip, then the beam is not just scanning the chip without doing serious harm, you can even watch the chip operating with the microscope imaging the voltage on the chip traces
04:32:48 <DHess_US> flyback, it depends on the energy. Usually you limit the acceleration voltage and current to limit damage.
05:04:53 <Kuschelpony> one of these sleepless thoughts: an LM317 used as an boost converter
06:17:54 <DHess_US> Possible, but most linear to switching designs started with a 723
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06:22:39 Quit: Jens ([email protected]) Quit:
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07:12:16 <flyback> I got like 20 old cpu heatsinks
07:12:25 <flyback> they are propritary dell ones so useless
07:12:30 <flyback> however
07:12:42 <flyback> they will be great to dril a hole in and mount a linear project
07:12:47 <flyback> it will stay ice cold for ages
07:14:19 <flyback> funny how linear regs still rule for some analog projects or digital projects where you need a weird bias voltage or your supply is unstable such as a small windmill project
07:16:48 <flyback> very small like < 10 watts windmill
07:19:40 <flyback> I call them "twitch windmills"
07:19:53 <flyback> wind belts, partial rotation windmills that just spin in a gust, etc
07:20:02 <flyback> there's ways to capture that energy and build it up
07:20:18 <flyback> yeah you can't run 24/7/365 but you can do work once in a while when you store up enough power
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13:49:17 Nick: grem1 is now known as gremlinz
16:00:35 Topic Is: Official IRC channel of the EEVblog - www.eevblog.tv
16:00:35 Set By: (1758501885) on: Wed Nov 21 19:30:38 2018
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20:28:13 Join: Ampera ([email protected]) to #EEVblog
20:28:31 <Ampera> signed up for covid/flu shot at local pharmacy
20:28:43 <Ampera> state guidance is that everyone should get the vaccine, but Walgreens asked me if I am in a risk category
20:28:55 <Ampera> apparently that includes depressed people, and I have been officially telediagnosed with depression
20:29:06 <Ampera> so obviously that means I am important enough to get one >.>
20:32:20 <Ampera> seems insurance covers it 100%, so that's nice
20:33:06 <Halcyon1> Depression is a risk category? Riiiight
20:33:10 <Halcyon1> Also hey Ampera
20:33:12 <Halcyon1> Also dammit
20:33:14 Nick: Halcyon1 is now known as Haldyon
20:33:18 Nick: Haldyon is now known as Halcyon
20:33:21 Quit: Halcyon ([email protected]) Client exited
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20:33:28 <Ampera> hi Halcyon
20:33:35 <Ampera> well tylenol causes autism now
20:33:35 <Halcyon> There we go
20:33:37 <Ampera> so
20:33:42 <Halcyon> Oh I saw that. ROFL
20:33:42 <Ampera> the people making the rules are huffing paint thinner
20:33:47 <Halcyon> What a fucking idiot
20:33:59 <Ampera> it's fun
20:34:15 <Ampera> all year they've been tearing trans healthcare a new one for being the worst thing since sliced hitler
20:34:30 <Ampera> but now that it's autism and tylenol suddenly everyone cares that they're making shit up
20:34:38 <Halcyon> *rolls eyes*
20:34:53 <Ampera> how are you Halcyon
20:35:19 <Halcyon> Good. Busy. Tired.
20:35:32 <Halcyon> Need to get my car serviced tomorrow and my licence renewed
20:35:35 <Halcyon> So that's fun
20:35:37 <Halcyon> You?
20:35:56 <Ampera> are your license renewals much more than a formality?
20:36:07 <Ampera> here you can do it online if you get an eye exam from a place that does them
20:36:15 <Ampera> which is apparently almost everywhere
20:36:18 <Halcyon> I mean, you go in, prove who you are, do an eyesight test, pay the fee, walk out?
20:36:33 <Halcyon> Should be like a 10 minute job
20:36:44 <Ampera> I did it without going to our DMV
20:36:59 <Halcyon> Oh yeah you have to go into the Government place that does it, there is no other option.
20:37:03 <Ampera> the NY DMV is actually really good. In person service is what it is, but they're doing a lot to make stuff easy to do without even showing up
20:37:22 <Halcyon> But last time I went into our equivalent of DMV to get rego plates swapped over, it was very quick and painless.
20:37:29 <Ampera> I renewed my license in 30 minutes after deciding I wanted to, and most of that was driving 5-10 minutes down the road to my AAA office to get an eye exam
20:37:41 <Ampera> they submit that to the state, and then the state gives you a PDF that's a temp license you can print out
20:37:48 <Halcyon> They do the eye test at our "DMV"
20:38:04 <Ampera> They're usually pretty good about registration stuff too. I can renew my registration online and I think I can even transfer plates online
20:38:07 <Halcyon> But if you fail, you have to go see a specialist, or repeat the test in glasses or contacts
20:38:20 <Ampera> I technically don't even have to surrender plates in person, as I can just drop them off in a slot
20:38:31 <Ampera> the eye test I had was almost impossible to fail
20:38:36 <Ampera> I could read the entire chart
20:39:17 <Halcyon> Hahaha
20:39:41 <Ampera> Regardless, I still manage to find ways to give myself a shit ton of paperwork
20:40:13 <Ampera> Based on some rule/law changes in Canada, there's a distant but real chance that I could qualify for citizenship there
20:40:38 <Ampera> but that requires a huge pile of obscure documents and a ton of application forms.
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22:50:33 <electrohead> !caffeine
22:50:33 * EEVBot turns electrohead into a rockstar
23:04:48 <K> hello soup laddles
23:27:39 <electrohead> soup laddle or soup ladie?
23:28:59 <K> soup laddle ladies
23:29:37 Join: Nothing\ ([email protected]) to #EEVblog
23:29:45 <Nothing\> am i crazy or is the MOTD different?
23:29:54 <Nothing\> maybe i just never paid attention to it
23:30:49 <Nothing\> oh huh. Interesting you have to use EEVBot to send messages between users offline. The server I used to go to had an IRCD with a memoserv that functioned similarly
23:31:32 <Nothing\> anyhoozle, it seems this place is as lively as ever
23:31:38 * Nothing\ sips his iced cap
23:32:40 * Nothing\ glues his balls to his butthole (again)
23:46:05 Join: DHess_US ([email protected]) to #EEVblog
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