| kristianpaul | wpwrak: 13 tall is okay for you? | 00:09 |
|---|---|---|
| kristianpaul | let me take a pic | 00:10 |
| wolfspraul | wpwrak: 300 mA on SD VDD should be fine, here's a rough calculation done in the past http://lists.en.qi-hardware.com/pipermail/discussion/2010-May/004414.html | 00:10 |
| kristianpaul | wpwrak: http://en.qi-hardware.com/wiki/File:Pantallazo-6.png | 00:13 |
| kristianpaul | hmm still to big i'll try 8mm | 00:19 |
| kristianpaul | wpwrak: check again is 8mm tall in think i'll split and print it | 00:23 |
| kristianpaul | chao | 00:25 |
| kristianpaul | oops | 00:25 |
| kristianpaul | damm i always hate why heekscad dont let me move in less that one mm | 00:39 |
| kristianpaul | wpwrak: check last version of the pantallazo :) | 00:57 |
| kristianpaul | any way i'll print now | 00:57 |
| kristianpaul | in RED :p | 00:57 |
| Action: kristianpaul printing the lid | 01:08 | |
| Action: kristianpaul printing the body | 01:13 | |
| Action: kristianpaul done printin now taking pictures | 01:18 | |
| wpwrak | kristianpaul: wow, that's quick | 01:24 |
| wpwrak | 8 mm is still a lot. do the horizontal surfaces have to be that thick ? in total, you shouldn't need more than about 4.5 mm ... | 01:24 |
| kristianpaul | 2mm thick horizontal | 01:29 |
| kristianpaul | 1mm vertical | 01:29 |
| kristianpaul | wait some pics | 01:29 |
| kristianpaul | okay i try do smaller tomorrow | 01:29 |
| wpwrak | wolfspraul: 300 mA is better than i expected. nice :) | 01:31 |
| kristianpaul | http://en.qi-hardware.com/wiki/File:IMG_2666.JPG http://en.qi-hardware.com/wiki/File:IMG_2668.JPG | 01:33 |
| kristianpaul | wpwrak: my closed soure gps pull 200mA with no conplain i should add to what wolfspraul pointed | 01:34 |
| wpwrak | hehe, the simplified pcb is cute :-) | 01:34 |
| kristianpaul | http://en.qi-hardware.com/wiki/File:IMG_2670.JPG http://en.qi-hardware.com/wiki/File:IMG_2671.JPG | 01:35 |
| kristianpaul | and thats it | 01:35 |
| wpwrak | nice how it fits ! | 01:35 |
| kristianpaul | okay i'm off bed i try 4.5 mm tomowor | 01:35 |
| kristianpaul | gn8 | 01:35 |
| wpwrak | till tomorrow ! looks promising, thanks ! | 01:36 |
| wolfspraul | n8 | 01:39 |
| qi-bot | [commit] Werner Almesberger: ben-baseframe-bottom-100um is done. http://qi-hw.com/p/ben-scans/2cf011d | 03:10 |
| tuxbrain_away | wpwrak , kristianpaul : can I suggest a protuberance, hook li in that wpan case? , to "anchor" it to the hole "supposedly thinked to attach a strap", this way we can remove some mechanical stress to the uSD attachment | 03:34 |
| tuxbrain_away | hook li ->"hook like" | 03:35 |
| wpwrak | tuxbrain_away: you mean a little "nose" that goes into the hole ? | 03:38 |
| tuxbrain_away | yep | 03:38 |
| wpwrak | hmm, that hole is about 4 mm below the plane of the pcb. quite far. | 03:39 |
| tuxbrain_away | sure it will not remove all , but torsion will be less a risk ... | 03:39 |
| tuxbrain_away | well plastic is plastic, and the mould should be as expensive with that nose or not | 03:40 |
| wpwrak | one of my suggestions for the ya i had queued up would be two holes above the sd card plane where one could insert 100 mil headers. that would be pretty solid. | 03:41 |
| tuxbrain_away | good thinking :) | 03:41 |
| tuxbrain_away | but I'm thinking more on an accesory for actual ben... | 03:42 |
| wpwrak | ah, the nose could be somewhat difficult to make. for injection, it would at least need a much deeper mold (you'd have to rotate the bottom plate) | 03:43 |
| wpwrak | not sure about 3d printing. may be possible with a filler. depends a bit on the feature size. | 03:44 |
| wpwrak | (injection) and if rotating the bottom plate, it can't be flat anymore. but that may be okay in this case. could even look better. | 03:45 |
| wpwrak | makes the mold hard to mill, though. so you'd probably need a 3-part mold. | 03:46 |
| wpwrak | (hard to mill) because endmills that go deep enough would be relatively thick. | 03:47 |
| tuxbrain_away | well is matter to see how much it cost and if worth the meaning | 03:49 |
| tuxbrain_away | if it not protecct to much, maybe is just pointless such effort | 03:50 |
| tuxbrain_away | but I'm worried about the length of pcb and the tinny contact surface of attachement | 03:51 |
| wpwrak | yes, the mechanical stability isn't so nice. attaching to uSD is a great improvement upon having to cut up the lcd's pcb and running wires between the shells, but it's not perfect. | 03:53 |
| tuxbrain_away | any accidental push on the extreme and "clack" another sad geek crying for his broken toy | 03:53 |
| wpwrak | one more sale for you ;-) | 03:53 |
| tuxbrain_away | I only want happy geeks on my shop | 03:54 |
| tuxbrain_away | I agree on the avoid on soldering to hardware hack is a really great improvement in deed :) | 03:54 |
| tuxbrain_away | this can remove the Warranty removal advice on my future posts :) | 03:55 |
| tuxbrain_away | btw any one has attempted a soft serial by uSD yet? | 03:56 |
| wpwrak | you mean rs232 ? | 03:57 |
| tuxbrain_away | no 3V3 uart | 03:59 |
| wpwrak | yeah, that's what i meant. the rest is just level shifting :) hmm, would be tricky. | 04:00 |
| wpwrak | you could do it at high speed but tx-only with low duty cycle. | 04:01 |
| wpwrak | or at low speed. the problem is that you'd need to get an interrupt for each bit/sample. that's quite a lot, even at moderate speeds. | 04:01 |
| wpwrak | otherwise, you'd have to busy-loop until the byte is in or out. | 04:02 |
| tuxbrain_away | 9600 should be enough | 04:02 |
| wpwrak | ah, scratch tx-only. rx with low duty cycle would also be okay. | 04:02 |
| tuxbrain_away | why that difference in writting reading? | 04:03 |
| wpwrak | hmm, that's about 20 kHz interrupts or more. | 04:03 |
| wpwrak | naw, tx and rx should be the same. i didn't think that you could just interrupt on the start bit. | 04:03 |
| wpwrak | you need extremely tight interrupt latency, though. that's usually not a problem, but sometimes it is. so whenever your interrupt is late, you have some data loss or corruption. | 04:05 |
| wpwrak | of course, if your cpu is dedicated full-time to the "soft uart", then you don't have timing problems. you just busy loop. | 04:06 |
| tuxbrain_away | I have some C bit banging serial code example from carlos from my early serial attempts, never used it, and actually I have scarce time to investigate, I will try to recover it , and think how adapt it to the uSD pins | 04:07 |
| wpwrak | i would just add a cheap microcontroller that takes care of the uart timing :) you can feed it a very accurate clock from the ben, so you don't need a crystal. | 04:08 |
| tuxbrain_away | hehehe you have by passed my electronic skill by far with this sentence :P | 04:09 |
| wpwrak | ah, look at the atusd schematics and you'll see :-) | 04:10 |
| tuxbrain_away | link? | 04:10 |
| tuxbrain_away | projects.blablablablbablabla.bla | 04:11 |
| wpwrak | for quick access, http://www.almesberger.net/misc/ben/demo4/ | 04:11 |
| wpwrak | http://www.almesberger.net/misc/ben/demo4/pdf_atusd.pdf | 04:11 |
| wpwrak | CLK_16M is provided by the SD/MMC clock, which I set to 16 MHz | 04:12 |
| wpwrak | that way, i don't need a crystal. works quite nicely. | 04:13 |
| tuxbrain_away | it can reach 56700 with this approach? | 04:13 |
| tuxbrain_away | also is that microcontroller aviable in more hobbist friendly format? | 04:13 |
| wpwrak | if you have a chip that implements a uart in hardware, sure. you typically need something like 4x or 16x the bit rate. so that would be at least 1 Mbps, if your circuit plays along | 04:14 |
| wpwrak | err, what would "hobbyist friendly mean" in this case ? :) | 04:14 |
| wpwrak | s/ mean"/" mean/ | 04:14 |
| tuxbrain_away | easy to put in a breadboard :) | 04:14 |
| tuxbrain_away | no need to SMD | 04:15 |
| wpwrak | yikes. | 04:15 |
| wpwrak | but where's the fun ? :) | 04:15 |
| tuxbrain_away | haahahahaah | 04:15 |
| wpwrak | sure, there are tons of pics and atmels in dip packages | 04:15 |
| wolfspra1l | tuxbrain_away: what is a nice breadboard size in your opinion? | 04:15 |
| wolfspra1l | to go along with the breakout cable... | 04:15 |
| tuxbrain_away | mmm what you mean by breadboard , the soldering one or the lot of holes plastic pluggable one | 04:16 |
| tuxbrain_away | ? | 04:17 |
| tuxbrain_away | in the eschema what is the difference of AGND and DGND grounds? | 04:19 |
| tuxbrain_away | btw atusd is the hole schema for the wpan thing? is so "easy" to do? | 04:21 |
| wpwrak | agnd and dgnd aren't actually good concepts here. i copied that from the reference design. however, atmel themselves actually recommend four ground areas. | 04:22 |
| wpwrak | yes, the circuit is very simple :) | 04:23 |
| tuxbrain_away | That a good thing :) | 04:24 |
| wpwrak | what's a bit tricky is the rf side, especially the antenna tuning. the antenna design i'm using is for a thicker board. so i need to adjust the antenna. unfortunately, they don't say how. so it'll be trial and error ... | 04:25 |
| tuxbrain_away | ouch! | 04:25 |
| tuxbrain_away | yes AFAIK RF is even black magic to experts on such matter :) | 04:26 |
| tuxbrain_away | they do maths yes but at the end a lot of tolerance has to be added to results :) | 04:26 |
| wpwrak | yeah. and antenna tuning should be among the best in that regard. even adding a bit of plastic (e.g., a case) can change things quite dramatically | 04:27 |
| wolfspra1l | tuxbrain_away: I mean the "lot of holes plastic pluggable one" | 04:29 |
| wolfspra1l | do you think a soldering breadboard is better? | 04:29 |
| wpwrak | wolfspra1l: i think this is the kind rikard used: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=923273-ND | 04:32 |
| wpwrak | note the price even for such a small one | 04:32 |
| wpwrak | you would probably also have to include a set of jumper wires | 04:33 |
| tuxbrain_away | wolfspra1l: well I think they have very different funtions and on this case the soldering one not have too much sense due they are pretended to have hobbist final results , and due the size it will have will be no sense to attachech on uSD | 04:33 |
| tuxbrain_away | I have one in stock :) | 04:33 |
| tuxbrain_away | not of that model I find thos thinny ones too much tinny | 04:33 |
| wpwrak | here's a better kit. larger and with wires. http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=438-1046-ND | 04:34 |
| tuxbrain_away | if you circuit has some more than just one no to much complicated mc | 04:34 |
| tuxbrain_away | hey cammon don't point to competence :P http://www.tuxbrain.com/oscommerce/products/75 | 04:35 |
| wpwrak | ah, you have them too. good :) | 04:36 |
| tuxbrain_away | yes we do a mass buy directly to china manufacturer :) | 04:36 |
| tuxbrain_away | regarding the tinny model, I try it but when your circuit is a bit more complicated than just plug one microcontroler you miss a lot of holes :) | 04:38 |
| tuxbrain_away | so I find this model quite confortable and unexepensive | 04:39 |
| wpwrak | yeah, i thought more in the sense of a proof of concept. but you're right, a larger board has almost the same price. | 04:39 |
| tuxbrain_away | btw any clue when we could have some breakout uSD adaptors as first Ben NN complement? | 04:41 |
| wolfspra1l | I try to make some, but cannot commit to a date right now | 04:42 |
| wpwrak | wolfspra1l: what cost do you expect ? | 04:42 |
| wolfspra1l | first 10 maybe 15 USD/piece | 04:43 |
| tuxbrain_away | wow | 04:43 |
| wolfspra1l | I will probably do ribbon cable, not fpc | 04:43 |
| tuxbrain_away | that make sense.. less stress on the connector | 04:43 |
| wolfspra1l | tuxbrain_away: so I understand you have enough breadboard stuff already, I don't need to worry about it. great! | 04:43 |
| wolfspra1l | tuxbrain_away: wow high or wow low? | 04:44 |
| tuxbrain_away | wow high | 04:44 |
| wpwrak | yup. seems quite expensive. | 04:44 |
| wolfspra1l | good thing everybody here is used to work for free :-) | 04:44 |
| wpwrak | wolfspra1l: are you sure you asked factory.cn, not factory.ch ? :) | 04:44 |
| tuxbrain_away | hehehehe you know the pourest multinational company qi-hardware :P | 04:46 |
| tuxbrain_away | no comunism no capitalism no money :P | 04:47 |
| wpwrak | tuxbrain_away: they'll have an article about wolfgang in Exploit - The Magazine for the Globalized Entrepreneur, "How to pay less than the Chinese" :) | 04:47 |
| wpwrak | tuxbrain_away: ;-)) | 04:48 |
| tuxbrain_away | LOL | 04:48 |
| Last message repeated 1 time(s). | 04:49 | |
| wolfspra1l | wpwrak: right. | 04:50 |
| wolfspra1l | do you want to make microsd breakout cables for 10 USD / piece? | 04:50 |
| tuxbrain_away | ok ok let's focus (a bit) I understand this 10 are prototipes so price is .... "justified" but price expected for a higher number let's say 200 | 04:50 |
| wolfspra1l | please don't forget the fuse. also proper testing of each one. when it's done ship to David. | 04:50 |
| wolfspra1l | tuxbrain_away: come on in large quantities, in electronics, it's all zero. | 04:50 |
| wolfspra1l | all costs are just amortizations of one-time investements | 04:51 |
| wolfspra1l | the silicon and plastic and bit of metals is all near zero | 04:51 |
| wolfspra1l | so sure, for 100 it's already < 10 USD for sure | 04:51 |
| wolfspra1l | for 1000 even less, etc. | 04:51 |
| wolfspra1l | look at the total | 04:51 |
| wolfspra1l | 10 * 15 = 150 USD | 04:51 |
| wolfspra1l | think about the amount of work, counting really everything not like us here working 16h/day for free | 04:52 |
| tuxbrain_away | no no please the 0 asymptote discuse again not :P | 04:52 |
| wpwrak | oh, you're making only 15 ? | 04:52 |
| wolfspra1l | first I make 10, see the quality | 04:52 |
| wolfspra1l | send some people, then go from there | 04:52 |
| wolfspra1l | so for 100, let's say the price is down to 8 USD, that's 8 * 100 = 800 USD | 04:52 |
| wolfspra1l | for 1 million, I'm sure it can be done for 1 USD / piece :-) | 04:53 |
| wpwrak | for 1M it should be cents :) | 04:53 |
| wolfspra1l | I just bought some pouches (David will send you some), costing 15 US cents / piece | 04:53 |
| wolfspra1l | unbelievable | 04:53 |
| tuxbrain_away | mmm, I'm worried about selling price of breakout, more than 10¬ will be no joy | 04:54 |
| wolfspra1l | relax guys | 04:54 |
| wolfspra1l | you asked about price, I gave you one. I am paying. | 04:54 |
| tuxbrain_away | relax you too:) , I'm just doing projections about the data I have | 04:55 |
| Ornotermes | wpwrak: the solderless board on dikikey looks quite overpriced | 04:55 |
| wpwrak | Ornotermes: they're not cheap. well, the bigger one has roughly the same price as tuxbrain's. | 04:56 |
| tuxbrain_away | Ornotermes: don't think so, this bitches is quite expensive even buyed in large numbers | 04:56 |
| tuxbrain_away | at least if you want a quite bit of quality | 04:57 |
| wolfspra1l | aha :-) | 04:57 |
| wolfspra1l | tuxbrain is reality man... | 04:57 |
| Ornotermes | the small one i have cost like USD 4.25+vat for two pcs in sweden | 04:58 |
| tuxbrain_away | yes, I even see the small one cheaper, I was thinking on the larger one | 04:59 |
| tuxbrain_away | but as I said I found the smaller less practical | 04:59 |
| Ornotermes | the bigger looks more renable | 04:59 |
| Ornotermes | resonable | 04:59 |
| wpwrak | USD 3/each sounds more like what i imagined for the small one | 04:59 |
| wpwrak | i was thinking of a combination of cheap cable plus small board. of course, if the cable is so expensive ... | 05:00 |
| Ornotermes | i buy most things here: http://swechtrading.se/zencart/index.php?main_page=index&cPath=44 (a USD cost about 7.31 SEK) | 05:02 |
| Ornotermes | and their prices inclute VAT | 05:02 |
| tuxbrain_away | I think I should offer the breadboard+wires+breakout for 20¬/25¬ | 05:03 |
| tuxbrain_away | maybe I will add some leds and resistors to the package to complete without extra price | 05:04 |
| Ornotermes | tuxbrain_away: try to find suppliers in china if you don't have, shuld be a lot cheaper to buy breadbords from there | 05:04 |
| tuxbrain_away | you arrive late at the conversation, I also made a 1K order to china manufacturer | 05:05 |
| Ornotermes | oh, ok | 05:06 |
| tuxbrain_away | I have a lot of stock :) , luckily they are selling quite good | 05:06 |
| Ornotermes | i noticed i was highlighted when i got out of the shower :P | 05:06 |
| wpwrak | this took a moment to parse :) | 05:07 |
| tuxbrain_away | but as I said, was not ease to find a balance on price/quality, I see really cheap crap with closed holes and bad contacts... | 05:07 |
| wpwrak | tuxbrain_away: http://www.theonion.com/articles/chinese-factory-worker-cant-believe-the-shit-he-ma,1343/ | 05:09 |
| tuxbrain_away | and expensive ones than for it's price you should tell the board what to do with natural language and work with wireless energy taked from air , but not it was just a piece of plastic waiting for components to be plugged | 05:09 |
| Ornotermes | http://dilbert.com/strips/comic/2010-09-21/ wow, i didn't knew dilbert worked at apple ;) | 05:15 |
| qi-bot | [commit] Werner Almesberger: ben-lcdframe-back-1mm is done. http://qi-hw.com/p/ben-scans/6186a72 | 05:25 |
| kristianpaul | tuxbrain_away: if you can do a simple stecht of your idea about the case will be asier for me to understand where it goes in the design | 07:41 |
| qi-bot | [commit] kyak: Support two-byte characters in console http://qi-hw.com/p/openwrt-xburst/343b7ed | 07:49 |
| qi-bot | [commit] kyak: Added input (typing) and output (viewing) support for cyrillic in http://qi-hw.com/p/openwrt-packages/a8aff41 | 08:16 |
| -:#qi-hardware- [freenode-info] channel flooding and no channel staff around to help? Please check with freenode support: http://freenode.net/faq.shtml#gettinghelp | 11:35 | |
| qi-bot | [commit] Werner Almesberger: ben-lcdframe-back-500um is done. http://qi-hw.com/p/ben-scans/d5001c6 | 12:26 |
| wpwrak | kristianpaul: he's looking for an extension of the case at the antenna end, there it goes lower and then has a "nose" that goes into the little hole the ben has for a lanyard | 12:27 |
| wpwrak | kristianpaul: so if you push from above or below, the force would go to that nose and not act like a lever on the micro-SD slot | 12:27 |
| wpwrak | kristianpaul: not sure if it would really make sense, though. most likely, you'd just shear off the small plastic nose while the rest of the board wouldn't even notice what's happening | 12:28 |
| wpwrak | kristianpaul: that is, unless you have a really strong plastic that resists to shear like steel | 12:32 |
| wpwrak | kristianpaul: btw, what sort of plastic are you using for extrusion ? may have properties that also make it interesting for DIY injection molding. | 12:33 |
| kyak | bartbes: are you there? | 12:43 |
| bartbes | yeah | 12:43 |
| kyak | i've noticed that though i have libncursesw selected, the CONFIGURE_ARGS (specifically, --enable-widec) is not passed to configure script | 12:44 |
| kyak | does this "VARIANT" thing work at all? | 12:44 |
| bartbes | well... | 12:44 |
| bartbes | you should ask larsc | 12:44 |
| kyak | ok.. | 12:45 |
| kyak | larsc: do you know perhaps what could be the problem? | 12:45 |
| kyak | at the end i end up with libncursesw libraries as well as libncurses, but there is obviously no wide char support | 12:45 |
| kyak | configure says "checking if you want wide-character code... no" | 12:46 |
| kyak | (now that i have cyrillic utf-8 in console, i want to build lynx with multibyte support) | 12:47 |
| bartbes | well, it worked when I delivered it to larsc, he said he needed to make some more changes | 12:47 |
| bartbes | and now apparently it fails | 12:47 |
| Action: bartbes doesn't want to be blamed ;) | 12:48 | |
| kyak | hm, can you show your original version? | 12:50 |
| bartbes | I don't think I still have it | 12:51 |
| larsc | in theory it should work ;) | 12:51 |
| bartbes | well, it might be the reason why I never got wordgrinder to build either | 12:53 |
| kyak | i think it should build two times: | 12:54 |
| kyak | first times it should build libncurses, second time libncursesw | 12:54 |
| larsc | yes | 12:55 |
| larsc | thats what it should do | 12:56 |
| larsc | (in theory) | 12:56 |
| larsc | and at least did at some point in practice | 12:56 |
| kyak | larsc: while you are here, can i ask for another favor: feeds/packages/utils/vim/Makefile should have "--enable-multibyte" instead of "--disable-multibyte" | 12:58 |
| kyak | only this way i can make utf-8 work in vim | 12:58 |
| kyak | for vi (built-in busybox) it is enough to have CONFIG_BUSYBOX_CONFIG_FEATURE_VI_8BIT=y | 12:59 |
| kyak | also i think you should disregard my previous concerns about libncursesw... the second time (when it build libncursesw configure says "checking if you want wide-character code... yes" | 13:01 |
| kyak | so i'll continue digging on lynx's side | 13:01 |
| larsc | kyak: configure:6814: checking if you want wide-character code | 13:02 |
| larsc | configure:6824: result: yes | 13:02 |
| kyak | yes. soory for confusion | 13:02 |
| kyak | i only noticed the first time build before | 13:02 |
| kyak | where it said "no" for libncurses | 13:02 |
| bartbes | ... | 13:03 |
| Action: bartbes looks at larsc | 13:03 | |
| bartbes | time for payback? | 13:03 |
| larsc | nope | 13:04 |
| bartbes | hehe | 13:04 |
| larsc | no time ;) | 13:04 |
| kyak | larsc: what about vim? i think i have access to upstream OpenWrt | 13:05 |
| kyak | *you have | 13:05 |
| larsc | yes. but i'm not sure whether that change is wanted | 13:08 |
| kyak | why not? it won't affect existing users experience | 13:09 |
| kyak | also, i assume that those who want minimal vi, are satisfied with the one from busybox.. when they install vim-full they should expect multibye support (my opinion) | 13:10 |
| larsc | i'll think about it. | 13:11 |
| larsc | better ask mirko. i think he is more likely to merge such a patch | 13:11 |
| kyak | ok, thank you | 13:11 |
| kristianpaul | wpwrak: BAS | 13:54 |
| kristianpaul | wpwrak: ABS is the plastic | 13:54 |
| kristianpaul | wpwrak: i also have some nice balck PLA i think ill try that at last when got better design | 13:55 |
| kristianpaul | wpwrak: are you lanning do you own plastic molding machine? cool :D | 13:58 |
| wpwrak | i;m trying to find out what it would take. industrial injection molding has some scary properties, but some of them may exist simply because of specific requirements. | 14:03 |
| wpwrak | abs doesnt't look bad. in many ways similar to polyethylene. now if i could just find the mfr/mfi ... | 14:08 |
| kristianpaul | wpwrak: http://store.makerbot.com/plastic/red-abs-plastic-1.html the RED abs i used | 14:12 |
| kristianpaul | i dont see datasheet but i t should be | 14:12 |
| kristianpaul | i'll ask makerbot if you consider i should? | 14:12 |
| wpwrak | kristianpaul: i think i found a place with answers already: http://www.matweb.com/search/PropertySearch.aspx | 14:20 |
| wpwrak | LDPE should still flow better than ABS. about twice as well. | 14:22 |
| wpwrak | abs can handle more mechanical abuse, that's for sure. | 14:26 |
| rafa | ta taaaan! | 14:33 |
| wpwrak | rafa: good morning, too :-) | 14:34 |
| rafa | haha | 14:35 |
| rafa | :) | 14:35 |
| wpwrak | kristianpaul: what's interesting is that these plastics melt flow at pretty low temperatures. only ~105-120 C. i wonder if one could just heat a block of wood and use that as a mold, given enough time. (if the mold is hot, then there's no rush in injecting the plastic) | 14:36 |
| wpwrak | kristianpaul: ABS also uses much higher injection pressure than PE. ABS ~80 MPa, PE ~10 MPa. a DIY injector should be able to produce something around 1-10 MPa. | 14:47 |
| wpwrak | kristianpaul: actually .. i wonder if you really need more than a threaded tube you can heat, plus a large screw. add a motor and you have a servo-controlled injector, the pinnacle of injection techniques :) | 14:49 |
| wpwrak | (injection pressure) oops, that was another plastic. nope, only about 50 MPa for ABS and 80 MPa for LDPE. LLDPE would go as low as 10 MPa. grmbl. | 14:56 |
| kristianpaul | http://www.bbc.co.uk/news/technology-11379089 | 16:23 |
| urandom__ | bah fuck off intel! | 16:27 |
| wpwrak | a marketing strategy designed to be controversial ;-) | 16:35 |
| qi-bot | [commit] Carlos Camargo: Adding file-system http://qi-hw.com/p/nn-usb-fpga/9116375 | 18:08 |
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