IRC log for #edev on 20070810

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03:04.51Exilesok
03:05.08Exilesbut I don't think I signed up for a zipit beta
03:08.44ds2at $40 + shipping, they are damn nice Linux boxes
03:09.36MonMothaheh, I just have a policy of keeping serial number 1 of everything I design
03:09.45MonMothaend up with an awful lot of hardware that way :)
03:09.50ds2heh
03:09.58ds2and most people agree to that policy?
03:10.14MonMothawell, when I explain to them that there's a reason, they usually are fine with it
03:10.24MonMothaafter all, there's NO WAY I can answer questions later on if I don't have one
03:10.40ds2good reason
03:10.48MonMothaif I have one on the shelf I can go grab, I might at least have some hope of answering your question
03:11.15ds2the last thing I "designed" was a $10K box...hard to ask for one of those ;)
03:11.22MonMothathat and when I'm doing something for friends, I'm giving them things at cost (they pay for theirs and mine, but cost only), so they usually are fine
03:11.30MonMothaah, yes
03:11.48MonMothamost of what I design is target price of a few hundred at most
03:11.48ds2that's $10K BOM not retail/sale
03:11.54ds2heh
03:12.12MonMothayeah, same here.  few $100 BOM
03:12.23MonMothait's amazing how fast 5 cent caps can add up, too
03:12.31Exileswhat did you design that cost 10k?
03:12.40ds2those are more fun
03:12.47MonMothaI tend to way overdo bypass caps, but my devices tend to not have power problems!
03:12.48ds2Exiles: x86 based appliance
03:12.53Exilesah
03:13.19ds2bypass caps are a good thing
03:13.27MonMothaoh, agreed
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03:13.42MonMothaI try to get one on every set of pwr/gnd
03:13.54MonMothawhich is sometimes overkill if you've got good planes and they're near each other
03:14.14ds2do nonsurplus bypass caps really go for $0.05 each?
03:15.26ExilesI need t tube of silicon myself
03:15.33MonMothawell, in proto quantity they often do
03:15.40MonMothaget it up to a full reel and they're usually <1cent
03:15.50ds2yeah but protos can use surplus sources ;)
03:15.54MonMothatrue
03:16.05MonMothaI need to just get a whole reel of common caps and resistors
03:16.10Exilesfor what I need, I can't easilyinstall a bypass cap
03:16.19ds2Exiles: eh?
03:16.34ds2i been meaning to get a kit
03:16.46MonMothaTDK has some very nice kits (and some very nice, if expensive, capacitors)
03:16.54ExilesI'm installing some lm76 sensors in silicon on the bottom of a fich tank
03:17.00Exilesfish*
03:17.08MonMothaI'm sometimes amazed at the kind of ratings TDK can get on tiny little MLCC caps
03:17.19ds2Exiles: don't see why you can't squeeze in a cap
03:17.26MonMothaIIRC, they have 1uF 6.3V in 0603
03:17.31MonMothapossibly even 10V
03:17.43Exilesno pcb will be used
03:17.54ds2Exiles: so? =)
03:18.05MonMothads2: have you done flex stuff before?
03:18.24Exilesand it's a pita solding to soic parts with a solding iron
03:18.29ds2MonMotha: nope... unless you count salvaging components off it
03:18.33MonMothahum
03:18.40Exiles/smt parts
03:18.40MonMothabecause I may end up having to do one for an LCD
03:18.47MonMothathe connector on the LCD is a board/board connector
03:18.51ds2SOIC? heh try QFN with 0.5mm pin spacing
03:19.02MonMothamost of them have FFC connectors, but not this one
03:19.10*** join/#edev dijenerate (n=dijenera@72.51.96.254)
03:19.16MonMothads2: I draw the line at QFNs and BGAs as far as hand solderability
03:19.25MonMotha1mm QFN I might give a shot at, but not 0.5mm
03:19.39MonMothaI can do 0.5mm leaded parts, but not leadless
03:20.15MonMothabut yeah, SOIC is cake
03:20.16Exilesand then the parts will be under water fo years
03:20.21Exilesfor*
03:20.30ds2Exiles: you are potting it, right?
03:20.32MonMothaso encase it in epoxy
03:21.12ExilesI still need to figure out how I'm going to run the wires
03:21.26ExilesI need 4 wires toltal
03:21.49ds2why go with the lm76? I been thinking for a long time of doing something like that with the DS 1 wire sensor
03:22.09ds2Exiles: fresh or salt water?
03:22.20ExilesI want to be able to use both
03:22.25Exilesfor now fresh
03:22.30Exileslater on, salt
03:23.45Exileswhich is why I'm going to use silicon to seal them
03:25.37ds2is that enough to prevent copper migration, esp. w/salt water that might have inverts?
03:26.27Exileswell, if it's toltally encased, I don't think should should be able to enter
03:26.42Exilessalt should*
03:30.26ds2Hmmm
03:30.33ds2do you have any inverts at the moment?
03:30.39Exilesno
03:31.03ds2hmm
03:34.18Exilesbut still, better to do it right the first time
03:35.25ExilesI'm thinking maybe 30 gauge wire covereg wilth colocon on the bottom of the tank, and cotners of the tank, running it to where I need it
03:35.35ds2yes, but you have no way of indiciting a problem
03:37.19ExilesI am plaining on having 8-9 sensors or temp
03:37.25Exilesfor
03:37.29ds2but why the LM76?
03:37.45ExilesI have them laying around atm
03:37.52ds2ah
03:39.27Exilesdo you think I would be better with ds18b02 I think s the number
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03:44.27ds2well, it saves you 2 wires
03:44.36ds2and comes as a TO92
03:45.31Exileshmmm, wonder if I can make it use one wire
03:50.27ds2w/o causing copper ion problems?
04:20.29MonMothahow exactly are you going to get by with a single wire?
04:20.34MonMothayou need a loop for current to flow
04:36.50ds2it is in water afterall....
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14:31.12chouimatmorning
15:08.48prpplaguetake that you canadian geek
15:08.58prpplaguehehe
15:09.20prpplaguechouimat: things settling down after your court stuff with your ex-employer?
15:10.27prpplagueExiles: ping
15:10.35chouimatprpplague: yes ... still looking for a new job and going thru ugly code
15:10.57prpplaguechouimat: lovely
15:11.37chouimatprpplague: and I found a nice piece of c++ which make Boost look sexy ...
15:13.39chouimatprpplague: and the fire alarm went off 4 times last night in the building ...
15:15.24prpplaguehehe
15:15.28prpplaguechouimat: fun fun
15:16.14chouimatprpplague: the police just left, it's seems that some drunk or stoned kids decided it was a good idea to pull the alarm :(
15:17.18chouimatprpplague: and the code is basicly : "I wanted to learn about templates and I was reading the gang of four book" ...
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17:40.35ds2looks the zipit really did ship
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18:01.55prpplagueds2: lovely
18:04.50ds2Circuit City is the source
18:05.03ds2went to LW yesterday so didn't see your q this last night
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