<nicksydney>
i think it would be useful to provide feedback mechanism to the user to indicate low power maybe threshold if the battery is reaching 5-10% state
<whitequark>
and charging via USB
<nicksydney>
wpwrak_: the MCU that you are using does it come in QFP packaging...was thinking of resizing the schematic and using QFP MCU to make it easier for me to solder :)
<DocScrutinizer05>
shoot 3 rounds in the air when you run out of ammunition
<wpwrak_>
nicksydney: we can try to get out an indication. not sure yet about how clearly we can detect a battery nearing the end of its life.
<DocScrutinizer05>
btw even sub-1ms flash is still easily visible
<wpwrak_>
nicksydney: you can get it in LQFP 64 or LQFP 80 (as opposed to QFN 48)
<DocScrutinizer05>
there are receptors in human eye that act strictly edge triggered
<wpwrak_>
DocScrutinizer05: (< 1 ms) visible, yes. but very weak. (i happen to have it flash for about 1-2 ms now, to mark progress for power measurements)
<wpwrak_>
(3 rounds) yeah ;-)
<DocScrutinizer05>
wpwrak_: of course you want to operate LED on high current when going ultrashort pulse
<DocScrutinizer05>
not at the usual <1mA you regularly use for low power LEDs in continuous mode
<DocScrutinizer05>
rather like 20 or even 50mA, for 0.5mS
<DocScrutinizer05>
bq24150 on N900 sgnals fault condition with a 128uS pulse on a pin which happens to ben hooked up to red/green LED of RGB indicator LED
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<DocScrutinizer05>
the current is limited to continuous low power mode
<DocScrutinizer05>
i.e. <<5mA
<DocScrutinizer05>
the pulse is visible, not good but visible
<wpwrak_>
(high current) naw, peaks are bad. they mean that i would have to install huge caps just to feed the LED.
<DocScrutinizer05>
let's see
<DocScrutinizer05>
...
<DocScrutinizer05>
10uF?
<DocScrutinizer05>
make that 47uF and you're quite fine
<wpwrak_>
hmm, 47 uF may be good for about 0.1 ms, yes
<wpwrak_>
volate drop in the order of 200-300 mV
<wpwrak_>
but .. i still don't quite see the use case
<wpwrak_>
when the display is off, the device is in very low current mode anyway. so you're not likely to drain the battery there (and if you do, then the anelok is probably stowed away somewhere and you wouldn't see it blinking anyway)
<wpwrak_>
if you're using the device, it could just display a low battery indicator
<wpwrak_>
and if the battery is flat for good, then it just won't turn on :)
<nicksydney>
DocScrutinizer05: this also "http://product.tdk.com/capacitor/mlcc/en/documents/C3216X5R1E476M160AC.pdf driven correctly can also make nice klicking sounds " .... is this the same kind of clicking noise that i often hear when turning on a big amplifier product like one of those consumer based amp ?
<DocScrutinizer05>
not long ago my mood would've been like "buy it! for that lil bit of money it's a mistake to not buy it, even when I have NFC what for"
<nicksydney>
DocScrutinizer05: so now no mood ? :)
<DocScrutinizer05>
no, I try to stop that devastating habit
<nicksydney>
that extension board allows several peripherals...WiFi, ethernet, etc
<nicksydney>
LCD - 480 x 272 full color display .. 40-pin ZIF connector with ribbon cable to the display .... Resistive touch screen with 2 wire interface to xCORE ... yummy
<wpwrak_>
DocScrutinizer05: (cr2032) yes, i know :) and the board is nice. and pleasantly cheap. their flashing system is a little unusual but works quite well. the main problem seems to be the firmware - older versions didn't like linux.
<wpwrak_>
nicksydney: btw, did you manage to update it with windows ? after that, it may just work
<nicksydney>
wpwrak_: not yet need to visit a friend place to use a win machine...no windows at home
<DocScrutinizer05>
(needs a tad of thermostat readjustment)
<DocScrutinizer05>
(but I'd anyway place the thermo-sensor at *top* of the whole thing, making for a convenient automatic adjustment of vapor level
<DocScrutinizer05>
I guess the lid could use a huge heatsink so the HT230 goo can condensate and cycle instead of escape the can and vanish
<wpwrak_>
heh :) yeah, could be interesting at some point in the future. for now, i've made my peace with manual soldering. one day, i plan to be rich, buy me a bunch of CNC mills, then mod them to become pick and place machines and such. that way, such bulk-soldering techniques will become very interesting.
<DocScrutinizer05>
well, this ~60buck total VP soldering setup isn't exctly for bulk production ;-)
<DocScrutinizer05>
rather a convenient way to solder stuff you impossibly can solder any other way at home, like huge BGA chips etc
<wpwrak_>
yeah, i've still been able to avoid BGA :) but i know that luck will run out eventually ...
<DocScrutinizer05>
with the two items above, plus some good solder paste, even noobs should be able to create almost perfect SMD PCBs
<DocScrutinizer05>
I'd probably prefer that method over handsoldering even for extremely complex stuff like the android with glowing eyes ;-)
<DocScrutinizer05>
VP is *awesome*, judging by the physical basics of the whole process
<DocScrutinizer05>
no overheading, no problems to gheat up huge components and/or groundplanes
<DocScrutinizer05>
overheateing even
<DocScrutinizer05>
damn, typing sucks
<DocScrutinizer05>
time for coffee and a break
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<DocScrutinizer05>
whitequark anyway will be pleased to learn there are 50ml bottles easily available
<DocScrutinizer05>
courtesy Nikolaus, who OTOH denied any option to get that stuff from fab, since they would rather see us getting our soldering done by them
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<whitequark>
DocScrutinizer05: OOOOO
<whitequark>
that is awesome
<wpwrak_>
DocScrutinizer05: well, for the volume you'll need, you may as well start developing relations with good fabs. find their flaws before you have 1000+ units in the pipeline :)
<DocScrutinizer05>
wpwrak_: sorry, you lost me
<DocScrutinizer05>
I think you don't know about GolDeliCo relations to fabs and status of evaluation of the yield and flaws
<DocScrutinizer05>
do you really think I whould've dared to start Neo900 project without GolDeliCo already having a decent fab for complete production, that we know can really handle that task?
<DocScrutinizer05>
wel, "complete" as far as PCB manuf goes. I think they don't do housing/mech
<wpwrak_>
ah, okay. thought you may still need to make that choice. i mean, in germany it shouldn't be that hard to find a fab run by decent engineers :)
<wpwrak_>
i think in china they learn this kind of soldering in kindergarten :)
<DocScrutinizer05>
re China, I'm pleased to state that our fab is magnitudes better than what FIQ offered to OM
<DocScrutinizer05>
I think in Chinal they learn completely different things in Kindergarden. E:G. to ignore all manuals since they are too complex anyway. Rather throw sufficient try&error effort on anything you do, and learn to smile at bitching customers
<DocScrutinizer05>
whitequark: yeah :-)
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<DocScrutinizer05>
whitequark: I probably had taken the whole contraption with me ;-)
<DocScrutinizer05>
the keyboard looks pathetic
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<whitequark>
the mill has arrived to the remailer!
<whitequark>
fedex is amazing. not only they worked through what is considered holidays, but also they were able to accurately predict the arrival time
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<wpwrak_>
whitequark: the sequence makes the clip even nicer: looks as if there was a fake front on top of another fake front ;-)
<wpwrak_>
(fedex) they're great. if it can be done at all, they do it. i've had all the others drop the ball on occasion but never fedex.
<DocScrutinizer05>
anybody got a pointer for me to decode data from /dev/input/ts ?
<DocScrutinizer05>
larsc: another noob's silly question: now that I have opened the /dev/input/ts for read, and I guess X11 did as well, will both processes see all events or are they 'randomly' handed out to only one of both, so both processes see statistically only every 2nd event?
<DocScrutinizer05>
I'd guess they should show up at all read()s in sync, no?
<DocScrutinizer05>
for a 'normal' file this situation is pretty defined, each read() has its own read pointer
<DocScrutinizer05>
for concurrent writes it already starts getting funny
<whitequark>
DocScrutinizer05: naw it's duplicated for each process
<whitequark>
same for /dev/input/eventX
<DocScrutinizer05>
thought as much. Thanks
<DocScrutinizer05>
will the driver's _get() function get called once for each event or once for each process reading an event?
<DocScrutinizer05>
IOW is the duplication done in driver's code or in the lib that handles this
<whitequark>
for that you'll need to look at the code...
<DocScrutinizer05>
:-)
<larsc>
the dupliucation is done in the kernels core input code
<DocScrutinizer05>
thanks to your first link you shared, I'm almost there already
<DocScrutinizer05>
thanks! stopping to annoy and pester you ;-)
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<DocScrutinizer05>
epic!:
<DocScrutinizer05>
EV_PWR events are a special type of event used specifically for power
<DocScrutinizer05>
mangement. Its usage is not well defined. To be addressed later.
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<whitequark>
wpwrak_: you'll like reddit.com/r/nononono
<whitequark>
it's a subreddit about expensive machinery breaking