« first day (932 days earlier)      last day (3996 days later) » 

12:14 AM
Yo yo yo!
 
 
1 hour later…
1:27 AM
my client wants the docx version of my documentation for some reason :/ ... It's not normal practice to give the editable version of documentation to a client, is it?
 
@StaceyAnne Are they getting the source code for your work?
If they are then they want to have the ability to modify the design.
If they do that, then they ought to modify the documentation too.
Doesn't seem unreasonable to me, but then I've only been on the "hiring" side of the contractor relationship, not working as a contractor.
 
1:43 AM
They are getting the source code
I was just a bit concerned about them removing my name and the copyright
I guess they could remove that from the source, too
 
2:17 AM
@StaceyAnne Uh oh....
@MLM Yo!
 
@StaceyAnne Depending on what's in your contract, in the US your employer might actually own the copyright on the work you do. I know you're not in the US, but anywhere else except Europe I'd expect the law to be even less protective of copyrights...
Given you're probably working long-distance (maybe not even in the same country with your employer) it's probably a lot more up to how much you trust them than to what the law says anyway.
 
MLM
2:55 AM
@StaceyAnne I always have to worry about that with the themes I publicly release. There have been many cases where I have caught someone that has removed the text at the bottom but a message to the owner or their host, usually straightens them out. I am sure there are hundreds more, I am not aware of. My suggestion is to add some easter eggs in the code and documentation so that if there is ever a dispute you can show all those hidden identifiers.
 
3:12 AM
Yo, anyone here know what a regular/efficient time rate it would take for a TCP Socket to connect?
Say a Java socket...
 
 
2 hours later…
5:33 AM
@coding_corgi depends on the hardware. Three way handshake SYN-SYN/ACK-ACK on decent hardware is easily subsecond.
good morning @all
 
user61389
5:50 AM
Morning!
 
@CamilStaps I just discovered there is also a PICduino
you must like that
 
user61389
@jippie oh cool, but then you cannot use the arduino software, can you?
 
@CamilStaps of course you can, it is called something-duino
 
user61389
@coding_corgi depends. Is it wireless or ethernet?
 
(don't know, libraries will probably break)
 
user61389
6:01 AM
Hm, okay
 
(actually didn't read the article)
 
 
9 hours later…
2:46 PM
Yo yo yo!
 
2:56 PM
@jippie Ok,
 
3:23 PM
Hiya
@rawbrawb mVtt isn't a typo. It's just obsolete. :-)
 
@AnindoGhosh Yo!
 
@coding_corgi :-)
 
@AnindoGhosh I saw your answer, +1 and commented! never heard of that before, cool. Strange but cool.
 
@rawbrawb I have a very strong feeling they used a different terminology simply to communicate the waveform non-dependency. However, if you saw my edit to my answer, I am really curious as to why anyone would want to use a square or triangular wave when a sine would suffice. The sine would need less channel bandwidth due to not having harmonics, and would lend itself just as well to comparator-based pulse-stream regeneration.
 
@AnindoGhosh but it's really a TOS link right? so optically (after going through a non-linear element) it may not matter?
 
3:37 PM
@rawbrawb Nope, TOSlink is one of the possible S/PDIF media. S/PDIF can be optical (TOS) or electrical. In fact, most inexpensive S/PDIF peripherals that come built in on PC motherboards, e.g. ASUS high end motherboards, are almost always electrical S/PDIF.
@rawbrawb I personally prefer TOSlink over electrical, because of the electrical isolation it provides between devices.
 
@AnindoGhosh what is the modulation scheme? I assume it's serial digital of some sort.
 
@rawbrawb Wait, let me see if I can find something to answer that.
- See the Modulation / Demodulation heading, about 70% down the page.
@rawbrawb It's a pretty primitive comparator-driving-transformer-driving-comparator thing.
@rawbrawb Hmm, TOSlink optical cables are dirt cheap on eBay.com - there I go chasing rabbits again!
 
@AnindoGhosh thanks, the Vtt is to provide a minmal eye opening spec, poor way of specifying it. so that makes sense. the higher harmonic waveforms will open up the eye laterally.
@AnindoGhosh I note that some one hasn't had their usual snarky answer to the last Meta question yet.
 
@rawbrawb Yep, that's what I now understand. Overall, I think S/PDIF was an ill-structured spec. Had they done a better job, we would have been spared HDMI, with it's baggage of mandatory DRM, which I hate!
 
@AnindoGhosh Aaah just open up the panel, and pull the signals off of the CoG drivers .... ;)
 
3:46 PM
@rawbrawb I wonder if our pet snark is ill, on vacation, or has found a life. Not seen too much activity from that direction today.
@rawbrawb I'm an anarchist at heart - what you suggest would work for me (maybe), but not for the suffering masses crushed under the dictatorial thumb of Big Business.
 
@AnindoGhosh 2 out 3 of those are possible. the third? not in this universe, by definition.
 
@rawbrawb I refrained from mentioning more morbid possibilities, out of the goodness of my heart. If I cannot manage to solder wires onto this QFN package I am messing with, my good cheer might evaporate.
 
@AnindoGhosh I don't suppose you have stereo uScope?
 
@rawbrawb It's on my Amazon wishlist, but not yet, no. The value (or lack thereof) of Indian currency precludes such luxuries, at least for me, for now.
 
4:01 PM
do you guys know of any cheap/easy to use pcb houses that will do the assembly for you at really low volume?
like i wanna get 10 of these boards made but they have like 5 or 6 parts that would be really hard for me to solder
 
@NickHalden where are you located?
 
east coast USA
time isn't really an issue though, if it's in china or something i wouldnt mind waiting 3 weeks for shipping
 
@NickHalden that's outside of my network, I don't often directly get boards done myself. You're looking to have stencilling and reflow done. Right?
 
@NickHalden What kind of parts?
 
@ThePhoton QFP 16s
they can all be done by hand, i just know if i do it the yield will be like 50% and it will be frustrating and take a long time
so i dont really care if it's reflow or what, just want somebody else to do it for me
 
4:12 PM
I'm thinking for that quantity you want to find somebody who will just take it home and do it a their kitchen table.
But someone who knows what they're doing.
Anybody with a good soldering iron and even a basic microscope can do those by hand pretty easy.
Craigslist "gigs" board?
 
@NickHalden I use an assembly shop here in Mumbai that does that kind of stuff really inexpensively, by hand. Works out to about 4 cents a solder point in single unit volume, and lower for larger orders. This is not counting the boards themselves and the parts, of course.
 
@AnindoGhosh awww yeah that's exactly what im looking for. that would only run me like $10 on top of the board/BOM costs.
@ThePhoton haha maybe. if that's the case i guess i could just suck it up and do it myself at the office. we have a decent microscope and great soldering irons
and work doesn't mind when i use the tools for my own side projects which is very nice of them
 
@NickHalden If you add in the postage costs, it might not be such a great deal, though.
 
@NickHalden If you have a Metcal iron, it should be easy. Just tack down pins on two opposite corners to hold the part in place, then hit the rest ofthe pins.
 
@NickHalden However, if you want to do this on a regular-ish basis, I can get you in touch with them, or I can be the middleman for free as well, since I do go visit them all the time.
 
4:19 PM
@ThePhoton we've got a JBC set of tools (rework, iron, tip set) but they're very nice
@AnindoGhosh thanks! im currently not planning to do it too much but that would be cool if i ramp up my rate of side projects in the future.
 
@NickHalden If you want to mail a couple of boards to me, and are not fussed about the postal delays, let me know.
 
@AnindoGhosh hm ok, would i send the parts too or do they handle acquisition?
 
@NickHalden Mail me a BOM, I'll phone and ask in the morning. In general, commonly used parts are not a problem, but some of the more esoteric parts I use, I need to provide them with.
@NickHalden My mail address is in my profile.
Would anyone know what that 16x is, to the top left of the second diagram?
 
@AnindoGhosh wait mail? not email?
@AnindoGhosh yeah it's giving you pad dimensions of all 16 pads
@AnindoGhosh note the bottom right has it for the width measurement as well
 
@NickHalden I wouldn't put my snail-mail address in my profile, would I? eMail, of course. The boards themselves would have to be postal / courier of course, unless you want me to use a local board fabber as well (those are expensive in India).
@NickHalden Thanks... so next question, if all dimensions are in mm, why are there several dimensions in pairs?
like right on top there.
 
4:37 PM
@AnindoGhosh What is that?
 
@coding_corgi Diagrams for a QFN-16 0.5mm pitch part, from this datasheet:
 
@AnindoGhosh What is a 'QFN-16 0.5mm pitch part'?
 
@AnindoGhosh All 16 of the pads are the same length (min 0.3, max 0.5 mm)
@AnindoGhosh Min and max values
 
@ThePhoton so the part width dimension could vary from 3.15 to 2.85 mm?
 
@AnindoGhosh Yes that's how I read it.
Are they using a comma as the decimal separator, and this is not an NXP part?
 
4:44 PM
@ThePhoton It's a TI part (remember, I'm a Texas Instruments fanboy!)
 
@AnindoGhosh Ha!
 
@AnindoGhosh Are they using comma as decimal separator? I can't quite tell from the scan/screencap
 
@ThePhoton Yes, commas are decimal separators, as seems to be the norm for any TI datasheets by TI Japan, or a few other places. It's darn inconsistent.
7 mins ago, by Anindo Ghosh
http://www.ti.com/lit/ds/slusah0a/slusah0a.pdf
 
@AnindoGhosh But tolerancing is per an ASME standard...very weird.
 
@ThePhoton This entire BQ series of parts have really odd datasheets, and even more odd specifications.
 
4:47 PM
@AnindoGhosh new product line, new team, new apps engineers and new tech writers?
 
@AnindoGhosh Yes, lot's of countries do that. like in South America do that, I think I've seen that in Europe too,
 
@ThePhoton Or the workplace got contaminated with restricted substance vapors.
 
@coding_corgi Germans use comma, but I expect American conventions from TI.
 
@ThePhoton Yes, I would too, but didn't @AnindoGhosh say that it was a datasheet produced by a Japanese 'branch' (or whatever) of TI?
 
@coding_corgi This photo is of a QFN-16 IC... It's a tiny little 16 pin leadless (no pins) IC:
 
4:51 PM
@AnindoGhosh Maybe edit that one too...
@AnindoGhosh Ok, a tiny little guy!
 
@coding_corgi Haha! Finally I managed to upload the image!
 
@AnindoGhosh SMD version?
 
@coding_corgi No, I said that the Japan Ti docs all seem to use that convention too. No idea where that specific datasheet originated.
 
@AnindoGhosh Whatev...
 
@coding_corgi Yes, QFN is an SMD form factor.
 
4:54 PM
@AnindoGhosh Ok, what are you going to use it for?
 
@coding_corgi Energy harvesting from a piezoelectric bender.
 
@AnindoGhosh I feel REALLY stupid now, what in the world is a 'piezoelectric bender'!?!?
 
@coding_corgi Nothing to feel stupid about - until a year ago, I only knew those things as coin speakers.
 
@AnindoGhosh Yes, I know what a piezo is!
@AnindoGhosh But are you going to make a blender out of that?!?!?!?!??!?!
 
user61389
bender (stupid markdown)
 
4:59 PM
@coding_corgi Noooooo! That thing is called a piezo bender.
 
user61389
Good evening all :)
 
@CamilStaps Oh no! You're now starting to do edit-based animation!
 
@AnindoGhosh Ok, I was going to say, that will make a crappy blender...
@CamilStaps Good noon to you too! ;)
Yo is VS == VCC?
 
@coding_corgi Well, if you send two different audio signals to it, they might blend well enough ;-)
 
@AnindoGhosh :) I ment the one that could destroy stuff and make smoothies!
 
5:01 PM
Riiiiiiight.







No.
 
user61389
Not?
 
@CamilStaps Not not. Just no.
That last message of mine would look really weird out of context.
 
@AnindoGhosh your decision, you could make delicious smoothies instead...
 
@ThePhoton here's a laser question for you.
 
@AnindoGhosh No! REally?
 
5:03 PM
0
Q: Accurately measure relative intensity noise (RIN) using RF spectral analyzer?

IanRobertsI'm trying to measure the relative intensity noise (RIN) of a laser using an RF spectrum analyser. It's a fairly common method (outline: http://www.laserfocusworld.com/articles/print/volume-35/issue-5/features/how-to-measure-relative-intensity-noise-in-lasers.html) although I wondered if someone ...

 
user61389
@AnindoGhosh you want a star, is that what you're saying? ;)
 
@CamilStaps Looks that's what he got!
 
user61389
How's your hackerrank going @coding_corgi?
 
Bwaaaaaaahahaha
 
@AnindoGhosh is VS == VCC?
@CamilStaps Idle
 
user61389
5:04 PM
@AnindoGhosh go home, you're drunk.
2
 
@coding_corgi Insufficient context, dude.
 
@AnindoGhosh What?! Really! I am looking at an IR datasheet
 
@CamilStaps I am home. Also I have such low tolerance for alcohol, that I get pretty wasted on two Breezers.
@coding_corgi Link
 
There are 3 pins GND, VS, OUT, which one of them is + ?
@AnindoGhosh ok...
 
user61389
@AnindoGhosh having a limit is a good thing I suppose
 
@coding_corgi Vs = Vsupply. Some common terms are Vss (source supply), Vs (supply), Vcc (whatever the cc means), and also Vee, Vdd, and many more. I wish there were a single web page one could look up all those acronyms and their definitions at.
 
@AnindoGhosh It says 2.5V to 5.5V so i'll just give it 5V...
 
@CamilStaps Yeah, both my wife and I have no head for alcohol. Which is why we avoid it as far as possible.
 
@AnindoGhosh That's good!
@AnindoGhosh Same...
 
@coding_corgi The Vs is defined in the datasheet: Supply voltage (pin 3) VS - 0.3 to + 6.0 V
 
5:08 PM
@AnindoGhosh did not see that...
 
@coding_corgi When I said insufficient context and asked for the link, that was because datasheets will generally specify any short-forms like that someplace.
 
@AnindoGhosh bool = true; mebe I was just too lazy to read...
 
@coding_corgi I've found that a bit of rigor in reading datasheets pays off over time. However, every time I've tried to read an entire "detailed" microcontroller datasheet end to end, I admit that I have had some very restful sleep.
 
@AnindoGhosh I prevent that, by closing out the document-viewer!
 
@coding_corgi You will appreciate the soporific value of boring datasheets as you grow older, and sleep eludes you. :-)
 
5:22 PM
@AnindoGhosh Maybe we should sell well detailed datasheets as sleep-medicene!
 
@coding_corgi Sure beats chemical methods.
 
5:42 PM
@AnindoGhosh ! :)
 
5:57 PM
Yo yo yo?
It's quite in here...
 
good morning
 
6:13 PM
Hiya @jippie
 
:o)
so did I miss any low hanging rep today @AnindoGhosh?
 
@jippie I think you might have - many new questions today. I have not had the time to go through them though.
@jippie BTW, any links to continuous-rotation industrial servos, please?
 
@AnindoGhosh nope, none handy. But I used to work on the servo controllers at Philips for winding CRT deflection coils and high voltage transformers
I believe they were spec'ed at 1kW
 
cool stuff, the transistors were bright as a halogen light bulb when then blew up
 
6:21 PM
@jippie Does the above look like a continuous rotation industrial servo, such as you mention?
 
@AnindoGhosh that was 1983, you are showing me a 2013 model. What do you think?
 
@jippie I mean technologically / conceptually. Not the specific device.
 
PWM was done well within audible range and with BJT's (BUS12A)
 
@AnindoGhosh the ones I worked on were cylindrical and I'm not sure where the encoder was positioned. Otherwise, yeah the same idea.
 
6:25 PM
@jippie OK, good, so today I learnt something new. My prior knowledge of continuous rotation servos was restricted to hobby servos modified by disabling the encoding potentiometer.
 
think we used async motors.
 
@jippie I was waiting for you to come online to help clarify my understanding.
 
o.
I feel honored :o)
 
@jippie I have a high regard for seasoned knowledge.
 
I think the two (regular RC hobby, and these ones) are about the two extremes in the spectrum
@AnindoGhosh I bet similar motors still exist and even at higher power, but as the example you showed, the rotor technology is quite different.
 
6:28 PM
@jippie I'm trying to understand how speed control happens on a sync motor.
 
These BUS12A were amazing transistors. They would actually burn a 1cm hole in the TO-3 cap in a matter of seconds
 
@jippie Hmm? Then how did they operate?
@jippie The biggest ones I've used are 2n3055. In fact I have a half dozen of those in my parts cabinet.
 
@AnindoGhosh Never really found the cause of blowing up, probably poor cooling.
 
I believe switching over 100V, four transistors for a half bridge, two half bridges per converter
Vtt in Dutch commonly refers to Volt top-top, which translates to peak-peak @AnindoGhosh
 
6:39 PM
@jippie That may be so, but in S/PDIF terminology (as also other comparator based transmission methods) it's Voltage threshold-to-Threshold in English.
 
We're neglecting half the approved topics for the chat! slate.com/articles/life/drink/2013/05/…
 
@AnindoGhosh less trivial that it appears at first sight
 
7:06 PM
couldn't have been async motors, the drivers had too few power stages
 
7:23 PM
@AnindoGhosh have you ever played with Firmata on Arduino?
 
 
1 hour later…
8:26 PM
Yo yo yo!
 
morning @coding_corgi
 
8:57 PM
@jippie Good afternoon! ;)
@jippie What time is it in the Netherlands now?
 
2302
@coding_corgi time for bed
/me is out
 
@jippie see ya!
@jippie do you mean 23:02?
 
@coding_corgi no
23:04
 
@jippie :)
 
 
2 hours later…
11:31 PM
Yo yo yo!
It's been very quite all day!
I am starting to think everyone else got a life, but me...
 
11:52 PM
@coding_corgi Or a job...
But I was actually home painting my kitchen.
 

« first day (932 days earlier)      last day (3996 days later) »