| kristianpaul | he, i wonder why eeschma always warms when having another running instance of it | 02:31 |
|---|---|---|
| roh | .o(well.. DUH!) | 13:14 |
| qi-bot | [commit] Paul Cercueil: fbcon: update documentation for the "bind" parameter. (jz-3.5) http://qi-hw.com/p/qi-kernel/e46b4fc | 13:54 |
| wpwrak | all quiet in qi-land :) | 16:01 |
| larsc | how was your talk? | 16:09 |
| kristianpaul | did you recorded it? | 16:11 |
| kristianpaul | wpwrak: btw about capacitor i noticed you se cap value/RF in atben for some of then | 16:12 |
| kristianpaul | do you have another specific notation i should be aware..... | 16:12 |
| viric | What is likely to shorten the life of electrolithic capacitors? | 18:02 |
| larsc | a hammer! | 18:08 |
| viric | :) | 18:08 |
| viric | this sheeveaplug power supply... | 18:08 |
| viric | blew up the capacitors again | 18:08 |
| larsc | again? | 18:08 |
| viric | every year or half a year, time to replace some big capacitors | 18:08 |
| larsc | oh | 18:09 |
| viric | maybe I should understand the circuit instead of simply replacing them | 18:09 |
| viric | if it were open hardware... :) | 18:09 |
| roh | viric: gets to hot. | 18:10 |
| Ayla | use capacitors that support a higher Volt value | 18:10 |
| viric | I thought of that | 18:11 |
| viric | it's an easy parameter to change | 18:11 |
| viric | but a bit hard to make all fit in the case :) | 18:11 |
| roh | well.. its a design flaw | 18:11 |
| viric | one is 450V :) | 18:11 |
| viric | yes sure | 18:11 |
| viric | but I don't know th fix | 18:11 |
| viric | the fix | 18:11 |
| roh | thats the loading cap for the primary side | 18:11 |
| roh | there is no fix afaik | 18:12 |
| viric | well, last time it blew up (not the 1st time) | 18:12 |
| roh | s/loading/charging | 18:12 |
| viric | now it's another one, smaller | 18:13 |
| viric | 16V | 18:13 |
| roh | caps derate at high temperatures | 18:13 |
| viric | until 105°C all say | 18:13 |
| roh | also high rf currents can make similar effects. thats why low-esr is important in psu | 18:13 |
| roh | 105 is the higher one of 2 usual cap ratings. doesnt mean they survive long at such temps | 18:13 |
| roh | usually it should be way below 60deg C in there. | 18:14 |
| viric | on summer it gets far hotter | 18:14 |
| viric | in the box. :) | 18:14 |
| viric | so it's like something needs good ventilation. | 18:14 |
| roh | maybe you can modify it to use a external supply. how many and which secondary voltages does the psu do? | 18:15 |
| roh | 5V? 3.3? | 18:15 |
| viric | only 5V | 18:15 |
| roh | well.. then just remove the psu and add a barrel conn. | 18:15 |
| viric | 1amp though. | 18:16 |
| viric | or 2. | 18:16 |
| viric | let's say 2. | 18:16 |
| roh | well.. measure it and use a properly overspec-ed psu | 18:16 |
| roh | i guess a 2A psu will do fine. after all its just a 10W or so device | 18:16 |
| viric | I know it takes ~7W from 22V | 18:16 |
| viric | I know it takes ~7W from 220V | 18:16 |
| viric | I'll have to do that.. | 18:17 |
| viric | I found a power supply at home that has a usb port 5V/2A, it says. | 18:22 |
| qi-bot | [commit] Werner Almesberger: fisl2012/: fix some typos (master) http://qi-hw.com/p/wernermisc/c52e2b9 | 18:33 |
| qi-bot | [commit] Werner Almesberger: fisl2012/: add kicad schematics diagram; trim Makefile (master) http://qi-hw.com/p/wernermisc/d5a0a83 | 18:33 |
| whitequark | also, reverse polarization | 18:56 |
| whitequark | oh, I see, not the case here | 18:56 |
| viric | no, I think it's not the case | 19:00 |
| viric | I thought reverse polarization would make them blow quickly | 19:00 |
| viric | :) | 19:00 |
| whitequark | not necessarily | 19:01 |
| whitequark | suppose they're reverse polarized by -5V for 1% of the time | 19:01 |
| whitequark | (if the input voltage is 220V) | 19:01 |
| viric | as in... <3=>25==> | 19:01 |
| whitequark | heh | 19:01 |
| viric | ok | 19:02 |
| viric | for me it's very hard to pronounce '<3='. | 19:02 |
| whitequark | what's your first language? | 19:02 |
| viric | which reminds me that today I encountered a unicode character for MHz. | 19:02 |
| viric | catalan. | 19:03 |
| whitequark | mhm | 19:03 |
| viric | who thought of a single character for MHz? weird. | 19:03 |
| whitequark | what's your reason for learning Russian?.. | 19:03 |
| viric | I wonder how much more like that there are. | 19:03 |
| whitequark | (MHz) that's Unicode, they have lots of weird stuff | 19:04 |
| viric | looks like so. | 19:04 |
| whitequark | e.g. emoji. a single character for "tanabata sunrise" or something like that, I don't quite recall | 19:04 |
| viric | as for the reason... well, the cyrillic looked like funny for me, and the soviet past (so much hidden to us) also added some magic to it | 19:05 |
| whitequark | and it's not a kanji character; it's a pictogram which is only used by emoji | 19:05 |
| viric | is emoji the name of something? | 19:05 |
| viric | or your explanation looks to me a bit recursive? | 19:05 |
| whitequark | "emoji" is the name of the character set, just like "cyrillic" and "kanji" and "kana" are | 19:05 |
| viric | ah ok | 19:05 |
| whitequark | http://www.unicode.org/charts/PDF/U1F300.pdf | 19:06 |
| whitequark | one big WTF | 19:06 |
| whitequark | e.g. such pearls as | 19:06 |
| whitequark | "BABY CHICK" and "FRONT-FACING BABY CHICK" | 19:07 |
| whitequark | and different characters for "DROMEDARY CAMEL" and "BACTRIAN CAMEL". | 19:07 |
| viric | basic. | 19:07 |
| whitequark | and "EXTRATERRESTIAL ALIEN" and "ALIEN MONSTER" | 19:07 |
| viric | Well, when people can't embed tetris into their products, they do these things | 19:08 |
| viric | will there be unicode characters for tetris pieces? who knows | 19:08 |
| whitequark | I'm pretty sure there are already | 19:08 |
| whitequark | let me check... | 19:08 |
| whitequark | meh, no. what a pity. I'll consider submitting a proposal. | 19:09 |
| viric | thank you :) | 19:10 |
| viric | do you remember the DOS characters that allowed a mode like 160x120 or so, on text mode? | 19:11 |
| viric | half vertical, half horizontal, corners... | 19:12 |
| viric | I wonder what resolution unicode allows. | 19:12 |
| whitequark | it's not specified in any way | 19:22 |
| whitequark | Unicode is just a list of codepoints | 19:22 |
| whitequark | i.e. "an algorithm" | 19:22 |
| whitequark | a font is an "implementation" | 19:22 |
| viric | ok | 19:22 |
| viric | whether it is a bitmap font, or vector font. | 19:22 |
| viric | ts | 20:04 |
| viric | oops | 20:04 |
| qi-bot | [commit] Werner Almesberger: fisl2012/: add kicad cvpcb diagram (master) http://qi-hw.com/p/wernermisc/2fc3b97 | 20:23 |
| kristianpaul | wpwrak: btw about capacitor i noticed you set cap value in F/RF in atben for some of then | 23:46 |
| kristianpaul | do you have another specific notation i should be aware..... | 23:46 |
| --- Thu Jul 26 2012 | 00:00 | |
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