--- Sun Nov 6 2011 | 00:00 | |
bart416 | azonenberg, some idiot was trying to use aqua regia to etch a PCB :| | 13:14 |
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bart416 | Luckily somebody came up with the *cough* brilliant *cough* idea to dump some sodium hydroxide in it to neutralise it... | 13:17 |
bart416 | Needless to say we were rather pissed that said person did so | 13:18 |
bart416 | Cause with that it somehow managed to destroy the etching bath... | 13:18 |
bart416 | Meaning you had this ceramic table with either aqua regia on it or sodium hydroxide | 13:19 |
bart416 | We weren't quite sure | 13:19 |
bart416 | Made for a funny situation in terms of clean up | 13:19 |
soul-d | lol and i thought i was a chemical hazard | 13:22 |
bart416 | soul-d, try first year engineering students who haven't had basic chemistry yet | 13:22 |
soul-d | i havent had basic chemistry except books and a shed :) | 13:22 |
bart416 | Yeah, but you don't have access to a full lab with restricted chemicals ;) | 13:23 |
bart416 | Most of the really dangerous stuff is gone by now | 13:24 |
bart416 | But still enough of it to go around | 13:24 |
soul-d | no but half lab and most dangerous stuff | 13:24 |
soul-d | and i can pretty much order all | 13:24 |
bart416 | Dunno, could you just grab 3-4 things of the shelve to make an explosive? | 13:24 |
soul-d | this is a garden site | 13:24 |
soul-d | http://www.floratop.nl/index.php?action=extra&extra=A_overig_chemie&lang=EN | 13:24 |
bart416 | Cause that's the case... | 13:24 |
soul-d | yes | 13:24 |
soul-d | i have kmno4 | 13:24 |
soul-d | good for flash | 13:25 |
soul-d | if i wanted to :P | 13:25 |
soul-d | and kno3 for and nh4no3 | 13:25 |
bart416 | We could make a few littres of nitroglycerine in matter of minutes >_< | 13:25 |
bart416 | Your turn | 13:25 |
bart416 | And this is an electronics lab... | 13:26 |
soul-d | if i wanted to i probably could do so to but i don't | 13:26 |
bart416 | I think the only thing we're missing is cyanide compounds | 13:26 |
soul-d | yah ill leave that to you same with most other fun stuff :) | 13:26 |
soul-d | sure for home chemist it's hard and probably not in large quatities but most is doable if you want | 13:27 |
bart416 | Do you have a block of arsenic? | 13:27 |
soul-d | people with bad intentions probably don't have a problem at all getting stuff needed | 13:27 |
bart416 | Somebody ordered that back in the day with the excuse "we need dopant materials to display" | 13:28 |
bart416 | Actually it was used as rat poison | 13:29 |
bart416 | Safe material handling *cough* | 13:29 |
soul-d | no but i don't have most dangerous stuff although maybe some | 13:29 |
bart416 | Keep in mind they cleaned up their lab | 13:30 |
bart416 | They thought it was a good idea to remove all the crystalised products that were borderline explosive | 13:30 |
bart416 | So their cleanup was done and we only had etching supplies left | 13:31 |
soul-d | sulfuric acid is most dangerous i have i think :P maybe others that are not are toxic like borax | 13:31 |
bart416 | And one of the lab assistants went to raid the material sciences lab... | 13:31 |
bart416 | So essentially nothing changed | 13:32 |
bart416 | Except that we don't have bleach anylonger | 13:32 |
bart416 | "You can't have bleach!" | 13:32 |
bart416 | "But we have a bottle of 1l of 1M HCl" | 13:32 |
bart416 | "You can't have bleach in the lab" | 13:32 |
bart416 | Wtf??? o_O | 13:32 |
soul-d | lol | 13:33 |
bart416 | ^Logic | 13:33 |
soul-d | how much is that in% do have 5 of 30% gcl for no apearent reason :P | 13:33 |
bart416 | what do you mean? | 13:34 |
soul-d | i meant to ask what you ment with 1L of 1M HCl | 13:34 |
bart416 | 1M HCl, so 1 mol of HCl molecules / l of solution | 13:34 |
bart416 | I'll put it this way, it's at the bottom of the pH scale | 13:35 |
bart416 | That's how safe it is to handle :D | 13:35 |
soul-d | oh yeah need to restart chemistry though only did it for like 2 weeks then deemed it to dangerous to do @ home well but ofcourse stocked up on lots of chems and supply's :P | 13:35 |
bart416 | And this is still an electronics lab... | 13:37 |
bart416 | We're not quite sure what they've got stocked in the actual chemistry labs | 13:37 |
soul-d | well i was terrified first time handeling h2so4 adding it to water | 13:37 |
bart416 | Probably highly enriched uranium or something | 13:37 |
bart416 | two near critical masses probably | 13:37 |
bart416 | sitting about 2m away from each other | 13:37 |
bart416 | That sounds about right | 13:38 |
bart416 | You should be terrified | 13:38 |
bart416 | H2SO4 is nasty | 13:38 |
soul-d | yeah but if it translates to shaking it doesn't help :D | 13:38 |
bart416 | also, idiots do it the other way around | 13:39 |
bart416 | Fun to watch actually | 13:39 |
soul-d | i like to watch from distances :) | 13:40 |
soul-d | espeicaly with chemistry | 13:40 |
bart416 | it's especially fun if they're not using pyrex glassware | 13:41 |
bart416 | makes for an interesting display of why you should do it the other way around | 13:42 |
soul-d | and still precautions with all glassware should be taken anyhow but i probably shoulnd say that atm :P since my shed looks like a student apartment with chemicals :') | 13:44 |
bart416 | Actually pyrex is pretty hard to break as long as you don't knock it over | 13:47 |
soul-d | problem is if you need to learn yourself is it's hard to start since it is hard to get all chems needed in a timely fashion egg from when you read a experiment in a book and then also learning all the saftey precautions regulations storage etc | 13:47 |
bart416 | excellent chemical resistance | 13:47 |
bart416 | And as long as you don't pour molten metals into it it should last rather long | 13:47 |
soul-d | yeah i knocked on over though , wasn't a true pyrex though although all is sodiumborsilisomthing glass | 13:48 |
bart416 | Borosilicate glass is pyrex... | 13:49 |
bart416 | but pyrex is shorter xD | 13:49 |
soul-d | :) thought it was brand name | 13:49 |
bart416 | In north america it is | 13:50 |
bart416 | In Europe and Asia Pyrex does refer to borosilicate glass | 13:50 |
soul-d | should clean mine lol just noticed i have them all dirty | 13:51 |
soul-d | ah thought it was french | 13:52 |
bart416 | now quartz... | 13:52 |
bart416 | That's a different story all together | 13:52 |
bart416 | quartz glass is pretty much perfect | 13:52 |
soul-d | weird stuff building alogic analyzer but now needitng to wonder wich output to trust the counter in breadboard or the logic analyzer's readout but first time i saw most of the count cycle complete :) | 13:55 |
bart416 | Hard to tell | 13:56 |
soul-d | yeah proably cause my target ground cable is a bit flimsy so maybe noise :P made one then figured out i don't have enough proper wires to wire it :) | 13:58 |
soul-d | http://imgur.com/a/65kr2 | 13:59 |
soul-d | was where i left of yesterday | 13:59 |
soul-d | but also just playing with signaltap for a day so don't know in's and outs yet | 14:00 |
bart416 | always have the ground be the shortest connection! | 14:02 |
bart416 | it's a common thing on all propper oscilloscopes and logic analyzers | 14:03 |
bart416 | the ground lead is shorter than the measurement probe | 14:03 |
soul-d | yah made a mistake in board anyhow put "target gnd" on fpga side instead of measuring side | 14:05 |
soul-d | but ill rember that | 14:05 |
soul-d | http://i.imgur.com/RoSul.png | 14:06 |
soul-d | currently target is 7 bit counter output on hc595 and 1 bit is used as clock (one of clock signals of external device) | 14:07 |
soul-d | probably should create internal slow clock :) | 14:08 |
soul-d | but thought it would be easyer to the timing that way | 14:08 |
soul-d | current setup -> http://i.imgur.com/DNKsN.jpg did order some supplies | 14:17 |
--- Mon Nov 7 2011 | 00:00 |
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