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12:20 AM
@ThePhoton Shift-S on top or bottom layer, drag freely, no problems
Alternatively: S; I; click-drag
I prefer the second, but automatically skip the S-I when my eyes see only Red or Blue, these days
The command hotkey path also allows, then, S-U for only touching objects, or S-O for objects outside, instead of inside
Once used to, three very, very useful commands
 
@KyranF Altium has got a nice importer for libraries. Works smoothly (at least for OrCAD and PADS). It saved a lot of time.
 
1:10 AM
@NickAlexeev yes, it does indeed. helps transitioning from those other ones into Altium. The place I interned at indeed had just transitioned from an old version of OrCAD to Altium and was building up/transferring library of parts. Altium also supported spreadsheet/database style symbol/component libraries which was handy
 
 
10 hours later…
10:55 AM
Anyone know where I can find a 10 turn 10k stereo potentiometer?
 
11:12 AM
every electronic shop
 
lol thanks
Seems like mouser doesn't have them
 
11:27 AM
mouser turkey? on mouser.de I can find 18 matches...
 
Could you send me a link of one of them?
 
have you looked at the normal or prevision potentiometer ones? sometimes it helps just to google some part number and look how they characterize them
 
I have looked at both of them
 
I have looked at those and those seem to be not stereo, they have only 3 pins
 
JRE
11:35 AM
Those are selected for two gangs. That'd be stereo.
The datasheets are for the basic pot that can be ganged. The selected parts are ones that have two pots ganged together.
If I select for one gang, the prices drop by about half, so I expect I got them right.
 
you have to be careful, sometimes they have two seperate tracks that are essential put together to be one pot though
selecting for audio pots can lead you somewher too
2 gang audio is almost always those things it seems
or I was lucky in the past
 
 
1 hour later…
12:45 PM
hm, I wonder if there are any ATX PSUs that alternatively to their mains voltage take 12-14V input, kinda like a ups/psu hybrid
 
1:08 PM
@PlasmaHH CarTX / MiniCarSupply / etc etc. But with a high efficiency 12V Adapter added to them
Or, why not go for 24V battery and use all high efficiency Buck and Inverting Buck
Can get you UPS efficiency near or even upward of 90%. Especially using more modern battery chems
 
Collecting options at this point. Mainly thought about car battery being convenient because I can use the same rail as the backup for wifi router, fritz box and switch
 
I'd imagine you want to power electronics with a somewhat stable voltage that doesn't go between 10.5 and 15V?
 
I don't think that is necessary, I will have to check the fritzbox but the wifi and switch can run from 10V to 30V input
 
So then at least 18V-ish Lithium type would work
Find the right number of cells and kind of chem and you can use any run of the mill 19V/250W Clevo adaptor for primary power
 
recycling cordless drill batteries?
 
1:14 PM
Maybe, but you'd have to get very expensive ones or do it purely as a hobby
(i.e. no guaranteed backup)
I have been thinking about installing a low-V backup rail on some of those LiFePo cells I have because the project using them got canned
 
its just for my home as a backup for power outages, so in regard to that requirements are not that high
 
Router, Switches, ReadyNAS. But they are very distributed through a very concrete flat
 
I am getting some options and ideas on what is possible, like I think maybe I can use the same 12V backup rail for some emergency lighting LEDs in the stairs area
 
But it'd be nice to have a "10 minute git push / file copy window" at power failure
You can make all your 12V from whatever voltage
Nothing stopping you from using 96V batteries, other than the cost of HV ready made regulators
And my backup system won't be designed and ordered before 2017 as it looks now ;-)
But at upto 32V input ready made 12V or 5V at up to 20W can be had below 10 euro
20W is more than enough for emergency LEDs
 
yeah, especially if you look for the dull red submarine look ;)
 
1:19 PM
My Lab is lighted mainly by 22W of LED lights of 4 generations ago
That's not backup setting, that's work setting
Only need the Loupe Lamp's Fluo/TL when working on intricate.
such as the current dense 0402 stuff
I think my entire house needs only one of my Red 3W LEDs (if the walls were transparent) for low power silent running 90's Submarine lighting
 
I wonder why transparent walls are not more abundant
 
Also Submarines refitted in the last 5 years now just use high quality white LEDs when running silent, FYI
Loadbearing glass seems to still defy most builders * shrug *
 
Haven't been in a sub since 2001
though they didnt change anything i lighting there when going silent
 
Me neither, but I keep up with what happens, since everything electronics either is my business, or could be
Depends on the sub type.
Prolonged submersion Subs generally have better, high power lighting on normal run, having the switchover for silent running, if that means turning off the main drive also generating the kWs/MWs needed to run everything
And of course, most Navy subs are that, just that when they are in the docks, they generally try to avoid having it run main drive systems :-)
 
 
1 hour later…
2:33 PM
@JRE @PlasmaHH Well, then the datasheets and the images are of wrong part, right?
 
@abdullahkahraman usually the images on the website are just examples, and the datasheet often just shows one variant and then lists ways this could be different. look at the datasheet for a list of variations on it and what htose provide
 
JRE
@abdullahkahraman The data apply to all of the potentiometers of that series, and are correct (electrically) whether you have one, or two, or a half dozen ganged together on one knob. The datasheet also mentions that the units can be ganged and can be ordered ganged, so they are correct. If a bit misleading on first glance.
 
It says it is gangable, so should I buy 2 and gang them together physically so that I have stereo potentiometer?
 
JRE
2:53 PM
@abdullahkahraman That one says it has two gangs, so you order one of them - it is already "in stereo."
@abdullahkahraman Same deal. That part is already 2 ganged.
 
3:07 PM
Hey, what would you guys think about addding a SASER tag?
 
@tuskiomi why?
 
a wtf?
 
@PlasmaHH another excellent question
I still don't understand why tags aren't a 10k privilege
 
Sound Amplification by Stimulated Emission of Radiation. It's relatively new, and has some interesting applications.
 
@tuskiomi how many questions have we gotten on the topic?
 
3:10 PM
Without a tag, it's hard to tell....
 
I would guess its roughly around 0 +- 0.1
 
@tuskiomi Show me one question...
otherwise it's a completely moot point
because you can't make tags without a question to attach to them, and if there aren't more than 2 questions the tag will be auto-purged.
 
hm, nope, nope and... uhm... nope
tags are assigned by topic of the question, not by possible answer technologies
I have the suspicion that you don't know what a saser really is
its not using microphones and amplifiers, its using physics
like gas bubbles in a liquid enclosed by an electric field
 
@PlasmaHH haha, anything that you could name in real world has related physics. a LASER is just something that produces photons in a very narrow beam. That's it. A SASER is the same thing, with sound.
 
3:20 PM
no, like the acronyms say, the process in how these are created is important too
and the important process in all of these is the stimulated emission of coherent waves in whatever medium
which gives the saser the funny property of operating at 100GHz or like those frequencies
 
the SER part is very broad, and not in the slightest exclusive to LASERs or SASERs. Heck, one could say fire is SER of photons.
and they wouldn't be wrong ^
 
I call utter bullshit on that
 
stimulated emission of photons is the way most are made - electrons jumping energy levels.
 
JRE
@tuskiomi The key thing is the "A" in both of those. The "amplification" part. That's "Amplification by Stimulated Emission of Radiation."
If you don't got the Amplification, you ain't got the ASER.
 
you've got a LSER.
 
JRE
3:25 PM
You got a light bulb.
Which is a damned far cry from a laser.
 
^quite.
I suppose, then a SASER would have to have a resonating medium to be able to be called so.
 
JRE
3:38 PM
A 1Watt LED is just bright. A 1Watt laser will burn your skin or put out your eye.
@tuskiomi Which is why none of the questions you suggested would belong to a SASER tag. No "ASER" in any of them.
 
Hmm, I suppose not.
 
3:56 PM
@tuskiomi Electrons jump energy levels two different ways, stimulated and spontaneous emission. Only stimulated emission is stimulated emission. Spontaneous emission is a different process.
And the light coming from a fire is almost entirely spontaneous emission.
@tuskiomi They would be wrong if they said that "fire is SER of photons."
 
@ThePhoton I would like to debate, but I don't know enough on black body radiation mechanics to continue. I've read a teency bit of a textbook (physics of light and optics, 2015 optics.byu.edu/prevtext/byuoptics13.pdf), which seems to favor it being stimulated (13.4), as opposed to spontaneous. Take it with a grain of salt, this is where my physics gets hazy. book link: optics.byu.edu/textbook.aspx
 

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