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2014-02-25 01:20 <nicksydney> wpwrak: which footprint you normally use for Balun ?
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2014-02-25 02:34 <wpwrak> 0805-6, from ben-wpan/modules/
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2014-02-25 02:49 <wpwrak> btw, this is a nice comparison between the 1052 (old) and the 2xx2 (new):: http://www.youtube.com/watch?v=_TSr9nFN1GU
2014-02-25 02:50 <wpwrak> some things he says are obsolete, but the overall comparison is still interesting. also, the 1000Z wasn't out yet back then.
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2014-02-25 02:51 <wpwrak> btw, this is a nice comparison between the 1052 (old) and the 2xx2 (new):: http://www.youtube.com/watch?v=_TSr9nFN1GU
2014-02-25 02:51 <wpwrak> some things he says are obsolete, but the overall comparison is still interesting. also, the 1000Z wasn't out yet back then.
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2014-02-25 03:05 <nicksydney> wpwrak: thanks for the footprint
2014-02-25 03:06 <nicksydney> bit lost looking at this datasheet http://www.silabs.com/Support%20Documents/TechnicalDocs/C8051T622-23-T326-27.pdf  .. does this mean that this is a normal MCU like KL25/26 or it is only a USB IC chip ?
2014-02-25 03:09 <wpwrak> seems to be general-purpose
2014-02-25 03:12 <nicksydney> interesting
2014-02-25 03:13 <nicksydney> if it says "USB Function Controller" that means the MCU supports USB out of the box correct ?
2014-02-25 03:14 <nicksydney> ahh yes pg 17 shows the diagram of connecting USB
2014-02-25 03:14 <nicksydney> the question is how do we program this tiny baby :)
2014-02-25 03:16 <nicksydney> seems like mouse is selling the daughtercard for this IC http://au.mouser.com/ProductDetail/Silicon-Labs/C8051T327DB28/?qs=sGAEpiMZZMuur7c7MCGU2DP8l2OptDKm
2014-02-25 03:19 <wpwrak> why pick this 8051 ? wouldn't you rather use an ARM ?
2014-02-25 03:20 <nicksydney> wpwrak: i was just curious ... what it takes to program one of this baby
2014-02-25 03:20 <nicksydney> wpwrak: ARM is better of course :)
2014-02-25 03:20 <wpwrak> well, you need a fancy voltage and something that speaks the C2 protocol
2014-02-25 03:21 <nicksydney> C2 protocol ?
2014-02-25 03:21 <nicksydney> http://en.wikipedia.org/wiki/C2 ?
2014-02-25 03:22 <nicksydney> ahh no this https://www.silabs.com/Support%20Documents/TechnicalDocs/C2spec.pdf
2014-02-25 03:22 <nicksydney> :)
2014-02-25 03:22 <wpwrak> yup, that one :)
2014-02-25 03:23 <nicksydney> so that what kind of format normally the final file after compiling .. is like the .hex in AVR ?
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2014-02-25 03:23 <wpwrak> depends on what you generate :) e.g., i think my C2 tools want a binary: http://projects.qi-hardware.com/index.php/p/f32xbase/source/tree/master/
2014-02-25 03:24 <wpwrak> but that was a long time aho. i wuoldn't use these chips nowadays
2014-02-25 03:25 <nicksydney> wakks...you have used this baby before :)
2014-02-25 03:26 <nicksydney> any special compiler or just GCC will do ?
2014-02-25 03:26 <wpwrak> it's an 8051, so you need sdcc (or commercial compilers)
2014-02-25 03:27 <nicksydney> this one http://sdcc.sourceforge.net/
2014-02-25 03:27 <nicksydney> http://projects.qi-hardware.com/index.php/p/f32xbase/source/tree/master/ not coming out...server DDOS ?
2014-02-25 03:27 <wpwrak> yeah
2014-02-25 03:28 <nicksydney> ahhh very late the page shows up
2014-02-25 03:30 <nicksydney> hmmm..checking out the code for that project ..the server is very slow :(
2014-02-25 03:31 <nicksydney> wpwrak: in what project you were using that IC ?
2014-02-25 03:32 <wpwrak> idbg and also ben-wpan/cntr/
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2014-02-25 03:33 <nicksydney> will look to idbg
2014-02-25 03:34 <nicksydney> wpwrak: are you able to checkout code from the server qi-hardware.com
2014-02-25 03:34 <nicksydney> mine stuc
2014-02-25 03:34 <wpwrak> committed earlier today without problems. servers are sometimes a little fragile
2014-02-25 03:35 <nicksydney> mm :()
2014-02-25 03:39 <nicksydney> C8051 series costs less than a buck
2014-02-25 03:41 <shevek> Is that in volume, or even single pieces?
2014-02-25 03:42 <nicksydney> shevek: single
2014-02-25 03:43 <nicksydney> wpwrak: was thinking was if package an OLED with a LED driver and allow it to be driven using I2C .. does it make sense ?
2014-02-25 03:46 <wpwrak> well, depends ... of course, the oled already does SPI, so you could use that
2014-02-25 03:47 <nicksydney> hmm..true
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2014-02-25 03:52 <nicksydney> wpwrak: this kind of IC http://www.silabs.com/Support%20Documents/TechnicalDocs/cp2104.pdf is normally a "pure" usb chip correct ?
2014-02-25 03:53 <nicksydney> wpwrak: so when we plug board that has that chip to linux it will be identified using 'lsusb' correct ?
2014-02-25 03:53 <shevek> Yes, I've used that one and it worked without a problem, similar to an FTDI chip.
2014-02-25 03:54 <shevek> Or maybe not.
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2014-02-25 03:54 <shevek> I used https://www.sparkfun.com/products/198
2014-02-25 03:54 <shevek> Which is CP2102.
2014-02-25 03:55 <shevek> It seems to be very similar, though.
2014-02-25 04:22 <nicksydney> shevek: yeah looks similar
2014-02-25 04:37 <nicksydney> shevek: when you tried that chip what kind of USB id does it show when doing lsusb ?
2014-02-25 05:25 <whitequark> DocScrutinizer05: tektronix 456 sells on avito for about $100 ;D
2014-02-25 05:26 <whitequark> ahh, it's broken though
2014-02-25 05:42 <nicksydney> wifi card such as this http://www.ebay.com/itm/BRAND-NEW-RALINK-RT5390-Half-mini-Wireless-N-Card-Acer-Asus-Dell-Toshiba-Sony-/251273254655?pt=US_Internal_Network_Cards&hash=item3a810d96ff are pretty cheap would be good to be used for a project
2014-02-25 05:42 <nicksydney> the problem is most of the driver are in Linux
2014-02-25 05:43 <nicksydney> so can't be used in project using Cortex-M series
2014-02-25 05:47 <nicksydney> interesting http://nut-bolt.nl/2012/carambola/
2014-02-25 05:48 <nicksydney> hmm...seems like a faster process that can run around 320Mhz or above + OpenWRT will do the trick
2014-02-25 05:59 <nicksydney> spec for carambola2 http://8devices.com/media/files/8dev-0700_0002_sb_SCH.pdf
2014-02-25 06:11 <nicksydney> ahhh so wifi uses 2.4ghz and even receiver like nordic also 2.4ghz so the difference is the comm protocol between the 2 devices that differentiate it
2014-02-25 06:12 <nicksydney> so that means we can even create a 2.4ghz module from scratch and determine what protocol we want to communicate with the other end
2014-02-25 06:19 <nicksydney> ahhh this is better http://arduino.cc/en/uploads/Main/arduino-Yun-schematic.pdf can see the big picture now
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2014-02-25 06:43 <nicksydney> PCB factory porn http://www.designboom.com/technology/arduino-factory-tour/
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2014-02-25 07:57 <DocScrutinizer05> whitequark: did you check your CNC?
2014-02-25 07:59 <DocScrutinizer05> whitequark: btw Galden droplet test finished. I can't *see* any more of the liquid, which doesn't mean it vanished. Rather I guess it simply spreaded across the glass so much that it became invisible
2014-02-25 07:59 <DocScrutinizer05> I might try some powder and see if it sticks somewhere
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2014-02-25 09:09 <whitequark> DocScrutinizer05: no scope, duh
2014-02-25 09:30 <nicksydney> interesting topic on Telegram protocol http://unhandledexpression.com/2013/12/17/telegram-stand-back-we-know-maths/
2014-02-25 09:30 <nicksydney> someone from Russia found a weak spot for it http://habrahabr.ru/post/206900/
2014-02-25 09:31 <whitequark> yeah, I don't know what they made it for, except a serious case of NIH
2014-02-25 09:31 <whitequark> overall telegram is just a whatsapp clone, like durov's previous project, vk.com--a facebook clone
2014-02-25 09:32 <nicksydney> yeah it's a clone
2014-02-25 09:33 <nicksydney> clever how that guy was able to find the flaw
2014-02-25 09:34 <nicksydney> http://mobilecg.hu/ now open sourced
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2014-02-25 12:11 <nicksydney> wpwrak: more ARM Cortex M0+  http://atmelcorporation.wordpress.com/2014/02/19/atmel-announces-embedded-world-lineup%E2%80%A8%E2%80%A8/?relatedposts_exclude=7927
2014-02-25 12:19 <whitequark> DocScrutinizer05: oh you mean, check it with soundcard scope
2014-02-25 12:28 <wpwrak> you should look at NXP. they have even more ARMs ;-)
2014-02-25 12:42 <DocScrutinizer05> whitequark: maybe even just start with probing voltages on motor coils. Check them right after power up of controller, with no PC attached
2014-02-25 12:43 <whitequark> hm
2014-02-25 12:43 <DocScrutinizer05> check the optocoupler output levels
2014-02-25 12:43 <DocScrutinizer05> should all be same with no PC attached, right?
2014-02-25 12:43 <whitequark> yes, they're pulled up at lpt side
2014-02-25 12:44 <DocScrutinizer05> ooh, those are only for output?
2014-02-25 12:44 <DocScrutinizer05> anyway, check them, I seen them going nuts several times
2014-02-25 12:44 <whitequark> well, there are optocouples for input too
2014-02-25 12:44 <whitequark> but they're not relevant here
2014-02-25 12:44 <DocScrutinizer05> for some weird reason optocouplers seem not be the most reliable of all conponents
2014-02-25 12:45 <DocScrutinizer05> why do you think so?
2014-02-25 12:45 <nicksydney> wpwrak: for some reason NXP is very expensive compared to ST, SiLabs or Atmel
2014-02-25 12:45 <whitequark> DocScrutinizer05: um, why would they be?
2014-02-25 12:46 <DocScrutinizer05> when a input OC has a hit, it might inject bogus signal to stepper
2014-02-25 12:46 <whitequark> wait, here I use input/output in relative to PC
2014-02-25 12:46 <DocScrutinizer05> meh
2014-02-25 12:46 <DocScrutinizer05> I don't
2014-02-25 12:46 <DocScrutinizer05> ;-)
2014-02-25 12:47 <DocScrutinizer05> you have an ideal circuit to debug. You got 3 identical sub-circuits to compare
2014-02-25 12:48 <DocScrutinizer05> should be easy to spot where X circuit differs from both Y Z
2014-02-25 12:50 <DocScrutinizer05> have to run. Meet Nik
2014-02-25 12:50 <whitequark> o/
2014-02-25 12:52 <nicksydney> WHAT ! !!! http://www.designboom.com/technology/tiny-cmos-sensor-provides-3d-images-from-inside-heart-and-blood-vessels-02-21-2014/
2014-02-25 13:02 <whitequark> ultrasound transducer. basically same thing as before, but now inside blood vessels
2014-02-25 13:04 <nicksydney> it's freakin' tiny
2014-02-25 13:04 <nicksydney> mad !
2014-02-25 13:04 <nicksydney> how do they manufacture it
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2014-02-25 13:32 <wpwrak> the siglent sds2000 series may also be interesting competition to the rigol ds2000. very similar features, apparently decent quality, can have 4 analog channels, has 8 digital channels (MSO) as well, you even get an (IMHO not very useful) signal generator :)
2014-02-25 13:32 <wpwrak> that seems to be a new trend: integrate basic signal generators in scopes.
2014-02-25 13:33 <DocScrutinizer05> well, when it actually can generate arbitrary signals, then I can see some usecases
2014-02-25 13:37 <wpwrak> should have an AWG, yes. still ... i have a function generator (with AWG capability) and i never use it. should have bought a frequency counter :(
2014-02-25 13:37 <wpwrak> most of the time, when i need some signal, it's something digital. and out comes the ben ... ;-)
2014-02-25 13:38 <wpwrak> ben + UBB are pretty much key pieces of my lab. for virtually (*) all the in-circuit programming i do lately, it's the ben that's providing the brains
2014-02-25 13:39 <wpwrak> (*) except when starting with the KL25. but thanks to their firmware not even supporting the next relatively minor upgrade in the series, i was forced to move to my own solution there as well. of course using ben + UBB ...
2014-02-25 13:39 <DocScrutinizer05> some digita signal is an arbitrary signal in my book
2014-02-25 13:42 <wpwrak> yes, that's what i mean. AWG = Arbitrary Waveform Generator
2014-02-25 14:21 <whitequark> btw: acrylic lives fine through 20sec of 270°C
2014-02-25 14:21 <whitequark> another fun thing, while heating up that board I pointed a bright light source tangentially to it
2014-02-25 14:21 <whitequark> and I think I watched epoxy transition to glass
2014-02-25 14:21 <whitequark> and back
2014-02-25 14:25 <whitequark> the problem with it, I can't seem to dispense it properly
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2014-02-25 14:53 <wpwrak> nicksydney: oh, and when looking for scopes, you want to stay away from the likes of owon and hantek. they're cheap but unfortunately it shows.
2014-02-25 14:54 <nicksydney> wpwrak: gotcha
2014-02-25 14:55 <wpwrak> atten also seems to have a lousy reputation. gw instek, so-so. there's a bunch of more obscure brands, too.
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2014-02-25 15:21 <nicksydney> Rigol seems the logical brand
2014-02-25 15:21 <nicksydney> ok seems like Bitcoin is going to be packing up soon and disappear .. poof !  http://www.cnbc.com/id/101442439
2014-02-25 15:23 <wpwrak> that's what the establishment would really like to happen ;-)
2014-02-25 15:24 <wpwrak> (rigol) the siglent 2000 does actually look pretty impressive from what i read about it. might be a worthy competitor for the rigol DS2000 series. still very new, though.
2014-02-25 15:24 <whitequark> mtgox was far from a good exchange
2014-02-25 15:24 <wpwrak> for the lower price range, rigol DS1074Z for sure. can't beat that one :)
2014-02-25 15:24 <whitequark> I mean, you had to jump through a number of hoops which would make traditional banking proud
2014-02-25 15:25 <whitequark> and could withdraw money exactly 2 times a year
2014-02-25 15:25 <whitequark> also, customer service rivaling cable isps in quality
2014-02-25 15:26 <nicksydney> this seems a fair report http://www.zerohedge.com/news/2014-02-24/bitcoin-community-gangs-bad-actor-mt-gox
2014-02-25 15:26 <wpwrak> my cable isp is pretty decent. the adsl ones seem evil, though
2014-02-25 15:26 <nicksydney> wpwrak: http://www.eyou.com.au/product/rigol-ds1074-70mhz-1gss-4-ch-7-color-lcd-/ ...$654 :(((
2014-02-25 15:26 <whitequark> wpwrak: I was more thinking, US cable ISPs
2014-02-25 15:27 <whitequark> they're proudly occupying 2nd lowest customer satisfaction index
2014-02-25 15:30 <whitequark> hm: https://btc-e.com/news/199 "2. The highest levels of security are already in place at BTC-e, and the company regularly uses external professional advice to further increase the security of our clients.
2014-02-25 15:30 <whitequark> errr not that
2014-02-25 15:30 <whitequark> "1. BTC-е is at its peak of financial strength with the record levels of clients and capital adequacy. The company plans to start publishing financial statements, verified by an external audit, on a regular basis."
2014-02-25 15:31 <whitequark> what kind of company deliberately seeks transparency? oh horror
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