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<apelete>
Good morning
<apelete>
mth: I saw an interesting way of representing a number in the programming manual last night, been thinking about it on my way to work today
<apelete>
the number was written 0x00001500
<apelete>
in hex
<apelete>
and then the same value was written as H'15
<apelete>
mth: what is that H'15 notation and how do you read it ? I don't remember ever seeing that before
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<DocScrutinizer05>
wpwrak: nice article
<wpwrak>
eintopf: that array of transceivers looks strangely powerful ;-)
<eintopf>
wpwrak: yea, I have a little usb powering problems sometimes
<eintopf>
when my brother turns his lights on in the neighboor room
<eintopf>
funny :)
<wpwrak>
that seems odd. the critters don't draw much power
<eintopf>
wpwrak: maybe my usb cable is too long and i put too much devices on it
<eintopf>
put I think it's the cable
<eintopf>
all my usb devices makes a reset
<eintopf>
I change a little bit my usb setup now
<eintopf>
using integrated usb hub in my monitor, maybe I get more power
<DocScrutinizer05>
eintopf: CFL lamp?
<DocScrutinizer05>
or LED?
<DocScrutinizer05>
or even FL
<DocScrutinizer05>
I think when your usb devices reset when some lights are turned on, then that's quite usually an issue of EMI razher that power brownout (unless the lights are 1000W halogen incandescent)
<eintopf>
halogen lamp
<DocScrutinizer05>
hmmm
<DocScrutinizer05>
those actually have quize a bit of inrush current to heat up
<eintopf>
when I had a analog connection, I saw this too
<DocScrutinizer05>
could you "record" the 50 (60?) Hz powerline from e.g. a magnetic mic or coil placed near to a transformer, and feed this to the mic input of your PC?
<DocScrutinizer05>
assuming you have no true storage scope
<DocScrutinizer05>
I'd be highly interested in the five seconds around the lamp-on event
<DocScrutinizer05>
you also could use the line-in and a 12V AC adapter plus a 50/1 resistor voltage divider
<eintopf>
oh, ehm
<eintopf>
when I have time
<eintopf>
you want that I do some record on my microphone input?
<DocScrutinizer05>
audacity makes for an excellent low frequency storage scope
<eintopf>
to sampling the light on thing?
<DocScrutinizer05>
yep
<eintopf>
and where should I put the wire?
<DocScrutinizer05>
I'd be interested in what kind of brownout (or other) event on mains line causes USB devices to reset
<eintopf>
DocScrutinizer05: ah ok
<DocScrutinizer05>
like I said, most accurate and simple and foolproof design is a 12V AC power supply (some DSL routers or modems etc have such), and user a voltage divider from a 5k and a 100Ohm resistor, then feed the both ends of the 100R to the line-in contacts of the PC
<DocScrutinizer05>
make sure the 12V is not galvanically coupled to protective earth
<DocScrutinizer05>
from your photo I gather you should know what i'm talking about ;-)
<eintopf>
a little bit
<eintopf>
I know voltage divider
<DocScrutinizer05>
that's about all it needs :-)
<eintopf>
and I have some 12 AC power supply here, of course
<eintopf>
from old routers which I put my mobile phone rs232 on
<DocScrutinizer05>
yep
<DocScrutinizer05>
AC is inportant
<DocScrutinizer05>
im*
<DocScrutinizer05>
you'll want to test that power supply with a multimeter anyway, to make sure it has no connection from secondary side to protective earth of mains
<DocScrutinizer05>
so you same time can check if it's actually AC, or maybe DC
<eintopf>
ah, I have a multimeter here
<DocScrutinizer05>
given you have some resistors at hand (or maybe a 47k potentiometer). the most troublesome component of the whole thing is the cable with 3.5mm plug to plug into line-in of PC
<DocScrutinizer05>
the rest are lab probe wires ;-)
<eintopf>
I have resistors, potentiometer I have everything
<eintopf>
but I don't know which resistor group I have
<eintopf>
but I can connect them
<eintopf>
in row
<DocScrutinizer05>
use your meter to check size
<DocScrutinizer05>
size? value? meh, resistance
<eintopf>
but I try this at weekend
<DocScrutinizer05>
if you only have identical ones, connect 10 of them in series, make sure it's a total resistance of 500<R<500k. and solder/clib the both wires of the line in to one of those 10 resistors
<DocScrutinizer05>
line in should be fine with anything from 50mV to 2V
<DocScrutinizer05>
it shouldn't smoke up even with 12V, but you rather try to avoid testing that ;-)
<mth>
apelete: I think H'15 just means 15 in hexadecimal; because it's in bit 15..8 of a register that explains the extra "00" after it
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<apelete>
that makes sense, indeed
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<paul_boddie>
qi-hardware.com seems unhappy. :-/
<paul_boddie>
Maybe I shouldn't have uploaded a 9MB Ogg Theora file to it yesterday. ;-)
<cde>
you foolish fool, you. ;p
<viric>
9MB! that's crazy
<viric>
that's millions of bytes!
<paul_boddie>
It seemed to work afterwards, so I doubt it was that, really.
<paul_boddie>
MediaWiki had the limit set to 1.9GB or something, in fact.
* lekernel
is happily using other servers
* paul_boddie
is also happily using other servers for most of his stuff, but likes sharing stuff on qi-hardware.com, too.
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<paul_boddie>
qi-hardware.com is back! Thanks, wolfspraul, xiangfu, or whoever you are! :-)
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<qwebirc88555>
Hi..
<qwebirc88555>
I'm from Brazil, and I'm very interested in the Ben Nanonote
<qwebirc88555>
But I can't find a place to buy it...
<mth>
afaik there were quite a few produced, so there might be some left
<mth>
I don't know who would have them though
<mth>
wolfspraul: do you have a warehouse full of Bens somewhere? ;)
<cde>
http://blog.elphel.com/2013/10/fpga-is-for-freedom/ "But this shift to Free Software does not yet apply to the main part of the software tools – tools for the FPGA or programmable logic (PL) in terms of Zynq development."
<cde>
an interesting article
<qwebirc88555>
If I heard about this project before...
<qwebirc88555>
Nothing serious, just a hobby, but I'm trying to learn about programming... This is the ultimate geek project..
<cde>
no, Skynet is the ultimate geek project
<cde>
however the Ben is very cool
<cde>
did you see my query btw?
<qwebirc88555>
No, i didn't, this crappy computer has problems...
<qwebirc88555>
Pandora is too expensive... Ben Nano would be perfect...
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<wpwrak>
qwebirc88555: pulster.eu may still have some. a bit awkward to buy from there, though
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<dos1>
awkward? why?
<wpwrak>
no credit card. also, some of the site is in german only.