#robotics Logs

Aug 14 2013

#robotics Calendar


01:27 pythonsnake i cant find any tutos
01:40 ShH facep
01:44 RifRaf enjoy :)
03:44 Jak_o_Shadows My microchips showed up today
03:50 GuShH Jak_o_Shadows: on their own? do they speak English as well?
03:52 theBear heh, and mine seem to have wandered off while i was in the shower... but they only spoke korean, so we didn't really chat much
03:52 Jak_o_Shadows Nah, the nice Mr. Fedex man
03:53 theBear the fedex man stole my microchips !?!?!?!?! gaaaaarrrghghghggh
03:58 Jak_o_Shadows Now I can control the robot arm AND the actual work in progress robot
03:58 theBear teach them to control each other and you can take a break :)
04:02 Jak_o_Shadows haha
04:14 SleepersTide lol
04:14 SleepersTide I bought a bunch of arduino pro mini clones on ebay, so that's what I'm using as controllers for stuff
04:15 RifRaf the nanos?
04:15 SleepersTide pretty cheap at about $3.70 each, but you need an FTDI thingor another arduino to program them
04:16 GuShH an ftdi thingor!
04:16 GuShH theBear: do you have such thingor?
04:16 GuShH for that kind of money you can't go wrong
04:18 RifRaf link?
04:19 SleepersTide the nanos are the ones with FTDI already on them, and they're a bit more expensive at $8ish
04:19 SleepersTide gimme a second
04:19 RifRaf ok i know the ones then
04:19 RifRaf i like the nanos for small quick things
04:19 SleepersTide http://www.ebay.com/itm/400389882462
04:20 theBear and ftdi ? not really, i got an old nokia cable somewhere but never got around to cutting it up yet
04:20 SleepersTide and http://www.ebay.com/itm/310674366051
04:25 RifRaf yep i'd pick the second one anyday for ease of use when prototyping
04:26 RifRaf SleepersTide, is good that you can breadboard them as well
04:29 Jak_o_Shadows Also, these are bare DIP chips, so breadboardable. Luckily the internal timer is good enough so far
04:34 GuShH 0°C yey..
04:36 RifRaf nice, our winter is so weak, has been 25C to 30C the last few days
04:36 RifRaf but loving it
04:36 Jak_o_Shadows lucky bastard
04:39 GuShH woot
04:39 SquirrelCZECH god damn it
04:40 SquirrelCZECH it looks like I can't find proper servo with abillity to turn 360 :-/
04:40 GuShH I can really feel all the thermal leaks in the house with such cold weather out
04:40 GuShH SquirrelCZECH: you suck
04:40 SquirrelCZECH that Continuous rotation that just ended in my hands can only do "one turn"
04:40 SquirrelCZECH ie. I can set it to angle: 90... (for example)
04:40 SquirrelCZECH that suck
04:40 SquirrelCZECH GuShH: maybe?
04:40 GuShH yes.
04:41 GuShH learn how to use a screwdriver and quit being a consuming biatch.
04:41 RifRaf don't not seem correct, continuous should just keep spinning
04:41 GuShH that is, modify it yourself.
04:41 GuShH four screws.
04:41 RifRaf unless you didn't pull out the stopper
04:41 GuShH it's not magic.
04:41 SquirrelCZECH GuShH: I would do that if I knew "what I am doing" :-)
04:41 RifRaf its easy to modify any servo
04:42 GuShH oh todays youth requires a tutorial for every aspect of life
04:42 SquirrelCZECH maybe?
04:42 SquirrelCZECH :-)
04:42 GuShH take it apart, learn.
04:42 RifRaf yep
04:42 GuShH quit depending on what others have to say about XYZ
04:42 GuShH they're wrong most of the time and talking out of their ass
04:42 Jak_o_Shadows SquirrelCZECH: Servos hold their position by a potentiometer, disconnect that and it won't know where to stop. Also that acts as a mechanical limit.
04:42 Jak_o_Shadows Also, there is often another mechanical limit
04:43 theBear c'mon man, it aint rocket science, pretty sure none of us read much at all before our first servo rebuild
04:43 uirrelCZECH is just thinking that is best way, because he doesn't have time to spend "hacking" one servo for week, that's
04:43 GuShH I just go for the tools... the hell with whatever others have to say about it
04:43 SquirrelCZECH Jak_o_Shadows: you speak about standart servo I suppose?
04:43 GuShH time
04:43 RifRaf takes about 5 minutes to modify a servo
04:43 GuShH you have time to bitch about not being able to find a tutorial on it
04:43 SquirrelCZECH RifRaf: if you know what to do?
04:43 GuShH what a bunch of bullshit.
04:43 uirrelCZECH goes doing something
04:43 theBear maybe 10 minutes if you wanna reverse engineer the circuit AND mechanicals in your head while you do it
04:43 GuShH you have time to buy the incorrect parts, whine and buy some more, clearly.
04:43 RifRaf yes, might take an hour the first time while you learn
04:43 Jak_o_Shadows Yeah, I suppose
04:44 GuShH if it takes you a week to put back together a hobby grade servo, you should take up gardening.
04:44 theBear heh, i spose not everyone reverse engineers in their head as quick as i do... years of repairs i spose i got pretty good at it
04:45 GuShH less made up excuses!
04:45 GuShH or I'll make my own excuse today to not do anything at all... it's too cold outside!
04:45 Jak_o_Shadows That it is GuShH
04:45 theBear fine then ! everyone IS as quick as me reverse engineering stuff <grin>
04:45 theBear happy now ?
04:46 GuShH he's just lazy
04:46 GuShH or she, or it. I don't know anymore.
04:46 RifRaf :)
04:47 GuShH Jak_o_Shadows: unless things begin to freeze I won't take the excuse.
04:47 GuShH I'm waiting for snow... I want snow :(
04:48 GuShH -1°C
04:48 GuShH I'd have to be 1100 meters above sea level for snow at this rate
04:49 SquirrelCZECH GuShH: not lazing
04:49 SquirrelCZECH *lazy
04:49 SquirrelCZECH just finding the best solution
04:49 GuShH you could've picked up a screwdriver by now
04:50 uirrelCZECH allready saw what is inside this "continuous rotation" s
04:50 GuShH if you need continous rotation chances are a servo is not the best solution.
04:50 GuShH it's not seeing, it's doing.
04:50 SquirrelCZECH ...
04:50 SquirrelCZECH god damn it
04:50 GuShH yeah damn that son of a peach
04:50 GuShH he tricked you into buying the wrong kind of motors!
04:50 SquirrelCZECH nope
04:51 GuShH go to church and show him what you're made of!
04:51 GuShH or as theBear would suggest, DONT GO TO CHURCH and that'll show 'em
04:51 theBear wtf ? you wanna do robot stuff or you just wanna watch stupid videos and instructables ? there's nothing to complain about if it's the first one
04:51 theBear did i say that ?
04:51 theBear i mean, it wouldn't surprise me
04:51 GuShH you could've said that
04:51 theBear yeah totally :)
04:52 SquirrelCZECH he sold me what he thought I need
04:52 SquirrelCZECH wrong anyways :-/
04:52 GuShH theBear: So I made a batch of the coffee-booze
04:52 theBear already ? damn, i haven't even read the whole link yet
04:52 GuShH it began to foam up after a few days... I shaked it and I got a lot of CO2 coming out the one way valve
04:52 GuShH Oh ignore the page, it's useless
04:52 GuShH but it gave me a few ideas
04:53 GuShH one batch is just the boiled "juice" with the yeast and sugar, the next one will include the ground coffee as well.
04:53 GuShH if there's CO2 there ought to be alcohol as well, but I suspect destillation would be required
04:53 GuShH as in, this thing probably tastes like crap.
04:53 theBear by 'the whole link' i mean, i read the title and half of the first sentence maybe
04:53 theBear well, i thought the taste thing would be kinda obvious :)
04:53 GuShH I read the spanish translation and the original english article.... they're both way off and provide no useful information
04:53 GuShH just assume you're making beer
04:54 theBear what, just beer but starting with coffeegrounds ?
04:54 GuShH on one hand they said "taste would improve upon time" and that implies they have not distilled it
04:54 GuShH right
04:55 GuShH I pretended it was a small beer batch
04:55 theBear indeed
04:55 RifRaf a dude got done driving, or trying to drive 7 times over the limit today in town
04:55 RifRaf kept crashing into cars so was not hard to catch him
04:55 GuShH was he in a hurry for number 2?
04:56 RifRaf heh he made the national news, some kind of record
04:56 GuShH "OH BOY OH BOY OH BOY"
04:57 GuShH theBear: I don't see anything off-putting in that bottle so far, so I will try it out once I feel it's close enough
04:57 theBear mmm, $2.70 isn't enough !
04:57 GuShH for? this was $0, unless you use bottled water.. and account for the sugar and the yeast >_<
04:58 GuShH tiny pinch of both anyway
04:58 GuShH oh and used the one way valve from a coffee bag
04:58 theBear this won't do at all !
04:58 GuShH it fits snug into a beer bottle neck.
04:58 theBear for cheap wine the night before i get paid
04:58 GuShH Oh I read that as "laid"
04:58 theBear you think they'll take tinned tomatoes ?
04:59 GuShH you tinned them with your iron?
04:59 ShH g
04:59 theBear lol
04:59 theBear yup, real purty
05:00 theBear hmmm... where's this dude, i bet he's got a couple bucks
05:00 GuShH he's not real man.
05:01 theBear then where did this laptop on my bed come from ?
05:01 GuShH santa.
05:01 GuShH that's why it's all sticky
05:02 theBear heh, wonder if they'll take that, it's fancy, i bet it'd get me a sixpack AND cheap wine :)
05:02 GuShH and a couple knives through your arse if he finds out!
05:02 SleepersTide what's this about coffee booze?
05:02 GuShH SleepersTide: shhh it's a secret
05:02 theBear who, santa ?
05:02 SleepersTide lol
05:02 GuShH the laptop dude
05:02 theBear i didn't know he rolled that way
05:02 GuShH SleepersTide: in theory you can make booze out of used coffee grounds
05:03 theBear i thoguth you said he doesn't exist ! i don't know what to believe anymore !
05:03 SleepersTide I'm a laptop dude, I fix laptops
05:03 GuShH he rolls like a gangsta
05:03 SleepersTide :P
05:03 GuShH SleepersTide: you suck
05:03 theBear lol, take that
05:03 GuShH theBear: he only exists after midnight
05:03 RifRaf lol
05:03 theBear but but, after midnight i'll have money AND the shops will be closed !
05:04 GuShH if they were closed, they could be un-closed
05:04 GuShH how do we open a shop? oh I know, do you have the owner's number?
05:04 theBear but i like them, they provide 98.3% of my drinking liquor
05:04 GuShH the remaining 1.7% comes from mouth wash?
05:04 SleepersTide GuShH: you can make booze out of a lot of things
05:05 theBear i think the owner is coles/myer, hmm, sounds like she's been married twice
05:05 SleepersTide I would probably draw the limit at soap
05:05 GuShH SleepersTide: not things you usually have or throw away
05:05 GuShH and I don't want to use distillation
05:05 theBear where would you find a twice married lady on a wed night... hmmmmmmm
05:05 GuShH you could also make soap out of someone!
05:05 GuShH and THEN turn them into booze
05:05 GuShH and THEN drink the booze in front of his family!
05:05 GuShH HOWS THAT
05:06 SleepersTide the ultimate revenge
05:06 GuShH Chemistry at work motha fucka
05:06 theBear heh, nobbad, not as good as turning them into chilli and feeding it to their family
05:06 GuShH that's horrible
05:06 theBear and that wouldn't be at work, that'd be recreational
05:06 theBear hey, it's not my idea !
05:06 theBear even if i do kinda like it
05:06 GuShH I think they're both messy.
05:06 theBear erg, one more coffee should help me think
05:06 GuShH help you in what way?
05:07 theBear well obviously, not many ways of killing someone and having them consumed by you OR anyone else that aren't a bit messy
05:07 GuShH unless....
05:07 theBear help me find about 50c, or the dude i just fixed a laptop for
05:07 GuShH automated meat processing plant?
05:07 theBear hehe, that sentence sounds too funny, i can't concentrate now
05:07 GuShH some "meat" they sell on lots of places and the streets you can't even identify with regular lab tests... scary.
05:08 theBear oooh, what was that cool term i learned last week.... err, roof rabbit maybe ?
05:08 GuShH what's a roof rabbit?
05:08 GuShH and does it go through the rabbit hole? that explains the leaks
05:09 GuShH damn rabbits are against me as well as the possums
05:09 theBear http://www.urbandictionary.com/define.php?term=roof%20rabbit
05:09 GuShH I saw the possum eating off the trash...
05:09 theBear not really sure why they call it roof
05:09 theBear not at all like a ceiling kitty
05:10 GuShH feel bad for the poor things, they act so agressively but they can't even hunt for food.
05:10 GuShH and when they're cornered they just act dead
05:10 GuShH what a silly animal
05:10 theBear i dunno about aggressively, but i spose it's a bit like that monty python scene, kinda hard for something so small and fluffy to look scary
05:11 GuShH 'cos cats like to fool around on ze roof
05:11 theBear meh, when you put it like that, a lot of dumb humans and wise dogs act the same way
05:11 theBear tho the dogs really need to be convinced you're superior
05:12 GuShH ze roof is not fur fullengz arrund! - said the governator.
05:12 GuShH I'm disliking dogs more and more every day.
05:18 theBear hehe
05:24 theBear hmm, this coffee isn't helping at all ! hmmm
05:25 SquirrelCZECH tea instead! :-)
05:25 GuShH what makes you think tea would help when coffee can't?
05:25 theBear pfft, don't be ridiculous ! tea is for, err, it's not for when i need a drink, ie. at least everytime the sun goes down
05:25 theBear and according to even the super sensitive b+w cam, the sun is down
05:27 SquirrelCZECH GuShH: because it have same effect? :-)
05:27 SquirrelCZECH but as I know on basis of different substances :-)
05:28 theBear tea and coffee don't make me stop shaking or being sober @!
05:28 theBear not even a little bit !
05:31 GuShH MrCurious: you got the sieg 1 or the 2? (bah the model number is a bit different...)
05:31 theBear hmm, how fast can a gbit lan move files ?
05:31 GuShH X2 I think
05:34 RifRaf seems to depend on the computers sending and recieving the files, typically faster than most computers can deal with it
05:34 theBear hmmm, good enough
05:35 theBear oh, then again if i used my brain, i'd notice my big disk was in a box with a usb cable.. heh, i'm on fire today
06:08 GuShH https://www.youtube.com/watch?v=-uX6lfQNCxE
06:09 theBear orright ! all the change in the house and 79c on the card *BAM* ! cheap wine
06:35 RifRaf invasion of the rues, look out
06:36 Jak_o_Shadows Hide the party hats
06:44 theBear hehehe, do they have tiny versions of themselves in a pocket built into their tummies ?
08:48 ShH stares at the
08:49 ek stares at theB
08:49 theBear huh what ? stop it, i'm getting all self conscious
08:49 uirrelCZECH takes photo of the
08:50 ShH photoshops a duck face and posts it on faceb
08:50 theBear heh
08:53 fRaf falls asleep, 5 hour print just started, trying to get these stupid parts r
09:15 mindw0rk_office so
09:15 mindw0rk_office anyone tried OSH Park?
09:15 mindw0rk_office They have a pretty sweet deal going on.
10:01 GuShH "Dear $User,
10:01 GuShH We would like to take this opportunity to thank you for being a SiteUptime user. "
10:01 GuShH ...What a bunch of jokers, they can't parse values on their own spam and they want to offer SEO
10:01 theBear lol
10:02 GuShH "As part of our effort to help you improve and maintain your website, SiteUptime is partnering with The Hoth (http://www.thehoth.com) to offer you a 20% discount on their Search Engine Optimization (SEO) plans. "
10:02 GuShH SEO... I can't believe it's still going, most of it is marketing bullshit
10:04 GuShH a real developer just calls it proper coding, there's no need for weasels sticking their nose in it and "making it better" unless you started with a poor foundation, in which case they're still promising bullshit.
10:04 GuShH polish a turd, it's still a turd.
10:05 theBear polish what ? is that what old ti calcs do ? <grin>
10:05 GuShH polish notation!
10:05 GuShH what old ti calcs? the new ones are just the same
10:06 GuShH I also can't believe they're still selling them
10:06 GuShH Must be like Legos, for nerds.
10:07 theBear i only got one ti, and it IS a 'scientific calc', first time i ever saw one with hex/dec/oct buttons etc, but it's still a calculator, not some crazy computer that people still go nuts over 30 years later :)
10:07 theBear i was a kid, it was at a boot-sale for maybe a buck or something <grin> fanciest calc i ever seen, calcs weren't that fancy back then generally
10:08 GuShH reminds me... I gotta find out what's wrong with an old commodore calc I've got
10:08 GuShH I suspect the entire 7 segment array has gone bad
10:08 GuShH very early stuff
10:08 GuShH nicad leaked inside
10:10 GuShH http://spyropoulos.net/calcs-other/Commodore6X.jpg
10:10 GuShH not the exact model, but same series
10:10 GuShH I didn't throw it away because it's a Commodore!
10:11 GuShH here http://www.vintage-technology.info/pages/calculators/commodore/co3m.htm
10:11 GuShH 70s vintage
10:13 GuShH heh TI display driver
10:13 GuShH I also keep a couple old VFD big ass desktop calculators for no good reason
10:13 GuShH (with printout and other fancy functions)
10:15 GuShH theBear: heh http://mycalcdb.free.fr/galerie/CBM/commodore.MM3PM.3.jpg
10:15 GuShH looks like something most people could make at home these days
10:16 SleepersTide nice machine, GuShH
10:16 GuShH is it? I think they were crap.
10:16 GuShH I wonder if they're worth more than 1 buck these days
10:17 SleepersTide lol
10:17 GuShH wtf http://www.ebay.com/itm/NEW-in-BOX-Vintage-1973-NOS-Commodore-Minuteman-Mini-RED-LED-Basic-calculator-/261260321360?pt=Vintage_Electronics_R2&hash=item3cd4542250
10:17 GuShH ok it's NOS...
10:17 GuShH still, jeez.
10:17 SleepersTide I think the oldest bit of IT I have is one of these things: http://en.wikipedia.org/wiki/IBM_Portable_Personal_Computer
10:17 GuShH still works?
10:17 GuShH my oldest "PC" is a 286
10:17 GuShH everything works
10:17 GuShH but nothing older than that...
10:17 SleepersTide nah, PSU shat itself
10:18 GuShH fix it
10:18 SleepersTide been putting off sticking some random AT PSU in it because it seems like an ugly solution
10:18 GuShH they're useless, but nice to fire up once in a while
10:18 SleepersTide Ideally I'd fix the original PSU
10:18 GuShH most likely the caps went out
10:18 SleepersTide that thing is nearly 1.5 times my age
10:18 GuShH :p
10:19 GuShH CGA
10:19 ShH snic
10:19 SleepersTide I have some kind of MIDI card for it
10:19 GuShH I don't think I'd throw something like that away
10:19 SleepersTide oh, no, of course not
10:19 SleepersTide it's basically a museum piece
10:19 GuShH except it doesn't work
10:20 GuShH >_<
10:20 SleepersTide reminds me, I should have another look at my mac classic
10:20 GuShH so the screen was phosphor?
10:21 SleepersTide GuShH: yeah, a pleasant amber
10:22 GuShH any burn marks on yours
10:23 SleepersTide don't think so
10:23 SleepersTide it's been a while since I fired it up
10:24 robotustra most nice robo hand http://www.h-e-i.co.jp/Products/e_m_g/ph_sh_2_004.html
10:25 GuShH robotustra: out of proportion as every robotic hand out there.
10:25 GuShH they're almost mimicking feet.
10:25 GuShH must be some unsurfaced fetish
10:26 SleepersTide yeah, the thumb is a bit long
10:26 SleepersTide or so it seems
10:26 robotustra thumb is ok
10:26 Tom_itx not if it was modeled after an ape
10:26 robotustra but the joint of thumb is not ok
10:26 GuShH Or the guy had a small penis and tried to compensate.
10:27 GuShH robotustra: none of the joints are "ok"
10:27 robotustra GuShH: why are you trying to compensate also?
10:27 GuShH how so?
10:28 robotustra by saying this?
10:28 GuShH that doesn't make any sense
10:28 robotustra I told you that I like this hand more than all other hands on the page http://mindtrans.narod.ru/hands/hands.htm
10:28 GuShH it's a joke. the guy must've had some form of sexual insecurity so he compensated, like most people do with their vehicles, weapons, etc.
10:29 Tom_itx i carry a pop gun
10:29 robotustra I think it was just his job
10:29 robotustra and he did it good
10:29 Tom_itx no sense of humor
10:29 robotustra more over, all japaneese have smal dicks
10:30 robotustra small
10:30 GuShH I wouldn't know
10:30 GuShH But if you say so...
10:30 Tom_itx couldn't tell you about tha
10:30 Tom_itx t
10:30 ShH chuc
10:30 GuShH Maybe he went on a quest?
10:31 GuShH robotustra: as long as the hand was able to function as intended... who cares if the thumb or other articulations are correct or not.
10:31 GuShH are/were
10:31 GuShH he still probably got a couple million for it right?
10:31 GuShH and now spends most of his time scratching his arse with one of the prototypes
10:32 robotustra not it's my turn to make a robot arm :)
10:32 robotustra today I'm finishing fasting
10:32 GuShH seeing it hold the crescent wrench in such an unnatural way... couldn't help but remember how useless every one of those wrenches I've used were in general for anything but loose bolts
10:33 robotustra and start to work on some project
10:33 GuShH robotustra: there's twitter for that.
10:33 Tom_itx i bet if it fumbled a part it would drop it unlike a human
10:33 robotustra I don't have twetter so you must be patient
10:33 GuShH hammer was also held incorrectly.
10:33 GuShH I think the japanese dude never used any hand tools.
10:34 GuShH I do, but it's automated I don't really use it
10:34 robotustra GuShH: they do, and more often than you think
10:34 GuShH robotustra: again, jokes.
10:34 Tom_itx wonder how well the 'right hand' works
10:34 KongfuPanda hey
10:35 KongfuPanda GuShH ! hello
10:35 GuShH hi
10:35 theBear the right hand knows not what the left hand do-s
10:35 GuShH I already forgot who you were
10:36 theBear he's po
10:36 GuShH theBear: is that so in the middle east and such?
10:36 theBear OBVIOUSLY
10:36 theBear middle east ? is that code for my liver ?
10:36 GuShH because with your left hand you...
10:36 GuShH wipey wipey?
10:36 theBear oh, i thought that was somewhere asian
10:36 GuShH or do they use the other hand, or no specific but they choose to remember while they eat?
10:36 theBear and c'mon man ! get yer head out of the toilet <grin>
10:36 GuShH I think they cover up their women
10:37 theBear definately somewhere asian they keep a long little fingernail for nose-picking
10:37 GuShH probably too ugly to be seen
10:37 theBear you'd think i'd remember where, but i do not
10:37 GuShH wat
10:37 Tom_itx GuShH, better that than fat american women running around in spandex
10:37 GuShH fat women do run?
10:37 Tom_itx if you could call it that
10:38 theBear well, if yer gonna do it, you may as well have a purpose designed nail, saves yer whole finger going in, and saves you getting mixed up and eating boogers later
10:38 GuShH roll
10:38 theBear nah, it's more of a err, what's a good term for it
10:38 Tom_itx they start the quake and wait for the aftershock to move them
10:38 theBear we might need a new word, i can envision the motion, mathematically or geometrically, without the fat lady thank god, but umm, a term for it
10:39 GuShH hmm
10:39 theBear something to describe not the waddling 'run' so much, as the way the flesh kinda trails behind
10:39 KongfuPanda GuShH, do you remember you advice about a garage door motor? Unfortunately I couldn't use that, but I managed to make everything work with a stepper motor and a USB-stepper board ;)
10:39 theBear oooh, i remember that :)
10:40 GuShH ok
10:40 GuShH the furnace on rails guy
10:40 KongfuPanda yeah :)
10:40 GuShH slash bong maker
10:40 KongfuPanda here it is: https://dl.dropboxusercontent.com/u/26776513/setup.jpg
10:40 GuShH theBear: still waiting for you to come up with the new word!
10:40 KongfuPanda I'm not a bong maker
10:41 GuShH haha
10:41 GuShH Ok then, what are those high voltage sex toys called?
10:41 GuShH the wands
10:41 GuShH you could make those as well!
10:41 KongfuPanda GuShH
10:41 theBear aww man !
10:42 theBear gimme some time, i'll get back to yer
10:42 GuShH lies
10:42 theBear in the meantime you remember where my halogen integrated reflector 'lightbulb' is
10:42 GuShH check inside the toilet
10:42 theBear YOU LIE ! i am the last truth-bender ! they made a movie about me :)
10:42 theBear it was 3d
10:43 GuShH everything is "3d" now adays
10:43 GuShH like it used to be in the early 90s
10:43 KongfuPanda I have another question today. I'm working on my hexapod robot again. And I would like to measure the force on the legs somehow. Is it theoretically possible to measure the current that servos are using?
10:43 GuShH why not
10:43 GuShH still unrelated to your first question-ish
10:44 GuShH in a way.
10:44 KongfuPanda GuShH, are you talking to me?
10:44 GuShH KongfuPanda: I'm the Italian guy here
10:44 KongfuPanda BELLO
10:44 SleepersTide KongfuPanda: yes, you can measure current that's going through a servo
10:44 SleepersTide pretty easily, too
10:44 GuShH you can measure current going through anything
10:44 SleepersTide well, sort of
10:44 GuShH the servo will consume power even when it's idle as long as it receives a signal
10:45 SleepersTide measuring current going through ionised air in a lightning bolt sounds pretty difficult
10:45 GuShH through feedback it will compensate and you could see if there's a change in current in direct relation to the load
10:45 GuShH SleepersTide: it's all possible
10:45 KongfuPanda SleepersTide, do I need to buy something or do you think my microcontroller board (AXON 2 ) may be able to do it ?
10:46 SleepersTide do you have a multimeter?
10:46 GuShH series shunt resistor, adc...
10:46 SleepersTide GuShH: yes, but that's a bit more involved
10:46 GuShH measure drop across the shunt
10:46 ShH eyer
10:46 KongfuPanda well yes, but that's not what I want. I want to be able to measure the force and the microcontroller would then do things depending on the force distribution for various servos (legs)
10:47 GuShH as I said, and he will disregard, and I'll get mad and walk away
10:47 KongfuPanda I can't solder a multimeter to my robot :D
10:47 SleepersTide ah, I see
10:47 SleepersTide in that case, do what GuShH said
10:47 KongfuPanda shunt resisor then, let me google it
10:48 GuShH just a small value resistor to which you'll perform a parallel voltage measurement to figure out the voltage drop across it and thus come out with the current value
10:48 GuShH it is exactly what your DMM would be doing.
10:49 KongfuPanda GuShH, but how can I then pass the voltage to the board?
10:49 GuShH ADC
10:50 GuShH and if your levels are too low, you'll need to buffer and amplify.
10:50 KongfuPanda can I buy an ADC with 18 inputs?
10:50 GuShH depends on the shunt value you come up with based on the tolerances you're willing to work with
10:50 SleepersTide you'll probably need to figure out which pins on your microcontroller are for its ADC
10:50 GuShH KongfuPanda: your mcu doesn't have any ADC channels?
10:50 KongfuPanda my robot is very light, I can't put anything heavy
10:50 KongfuPanda GuShH, let me check
10:50 SleepersTide it's some AVR with a ton of I/O
10:50 ShH raises an eye
10:51 SleepersTide but probably only has like 8-16 ADC channels
10:51 KongfuPanda hmm, it has 16 ADC
10:51 SleepersTide there you go
10:51 KongfuPanda well, I guess I don't need the horizontal servo forces
10:51 KongfuPanda ok, so I need 12 shunt resistors and connect them to 12 ADC pins
10:52 KongfuPanda thanks a lot people !
10:52 GuShH it's not that simple
10:52 SleepersTide good luck
10:52 GuShH in practice
10:52 KongfuPanda GuShH, no?
10:52 KongfuPanda V= IR
10:52 GuShH but go experiment.
10:52 SleepersTide or in your case, I=V/R
10:52 KongfuPanda well, I know the servo will not be a DC
10:52 GuShH KongfuPanda: once your sampling speed goes up for instance...
10:53 SleepersTide since you want to know I, and you know R and will be measuring V
10:53 SleepersTide KongfuPanda: servos do run on DC... unless you have some seriously weird servos
10:53 KongfuPanda oh
10:53 KongfuPanda then it should be easy
10:53 SleepersTide you know how servos work, right?
10:53 KongfuPanda GuShH, what are your concerns?
10:54 KongfuPanda SleepersTide, in theory :D
10:54 GuShH KongfuPanda: not enough tp
10:54 SleepersTide okay
10:54 KongfuPanda GuShH, what's tp?
10:54 GuShH toilet paper
10:54 KongfuPanda oh dear
10:54 GuShH isn't that a concern for most people?
10:54 KongfuPanda :D you are funny
10:54 ShH bl
10:54 GuShH No, really. Running out is a concern.
10:55 SleepersTide KongfuPanda: basically you want to measure the +v line, no significant current flows through the PWM line
10:55 KongfuPanda I like GuShH, he's funny
10:55 SleepersTide hey, running out of TP is no laughing matter
10:55 SleepersTide wouldn't want to have to use your sock or something
10:56 GuShH wat
10:56 GuShH KongfuPanda: http://gushh.net/tmp/ivr.png
10:57 SleepersTide yeah, that
10:58 GuShH all the more reason to stock huge amounts of tp.
10:59 GuShH you could make a fortress too, should the shit hit the fan.
10:59 SleepersTide barrels upon barrels of it.
10:59 ShH runs
10:59 SleepersTide lolol
11:16 KongfuPanda GuShH, if my ADC has 10bit resolution, and my voltage so servos is 5V, with max current ~0.4A. If I aim for 50mV drop across the resistor, with about ~10 values of current, then I should get like a 0.125 ohm resistor, right?
11:16 GuShH should I be doing your homework?
11:16 KongfuPanda yes please
11:17 KongfuPanda I need your wisdom
11:18 GuShH this is when buffering and amplifying comes in handy, regardless of your shunt value (which should be chosen based on maximum allowance of voltage drop and for thermal dissipation reasons as well, I don't think you care about thermal stability in this application, it's irrelevant)
11:19 KongfuPanda I can't have amplifiers, my robot is already too heave. I will need 12 of these anyway, so including all resistors, extra wires, soldering it will be already a lot
11:19 GuShH so < 1 gram is too much
11:19 GuShH per channel
11:20 GuShH KongfuPanda: then you'll need to live with a highly limited set of data.
11:20 KongfuPanda that's fine
11:20 KongfuPanda I only need very rough values of current
11:21 KongfuPanda i.e. to know if one of the legs is stepping on an obstacle and is struggling
11:21 GuShH yeah, no. you won't be able to achieve it.
11:21 KongfuPanda then I will tell the controller to lift that leg until the force is dropped
11:21 GuShH as I said, current is almost constant as long as there's a signal going to the servo
11:21 KongfuPanda why NOT??
11:21 ShH s
11:22 GuShH your idea is to measure current increase relative to load increase, if there is a difference it won't be huge.
11:22 KongfuPanda but I heard that the current is directly proportional to torque
11:23 GuShH but I haven't fooled around with servos for a long while, try it out first
11:23 GuShH KongfuPanda: and not all servos are equal
11:23 GuShH also how would you obtain directionality
11:24 GuShH without tapping into the feedback potentiometer -assuming analog servos-
11:24 KongfuPanda there is always directionality because current is increased when the legs push on something
11:24 KongfuPanda I think I will try this way with one leg and see what I get
11:25 GuShH just measure current consumption on the lab psu as you try to stall the servo with your hand
11:25 KongfuPanda will do
11:25 GuShH then apply forces similar to what you'd expect
11:25 KongfuPanda I can actually measure the current values now with a DMM and know for sure
11:25 KongfuPanda good idea
11:25 GuShH and see if the difference is measurable with good repeatability using the limited amount of resolution you'll have
11:27 GuShH if this is for some sort of IK then there surely is a lot of material out there you can read :/
11:53 SleepersTide KongfuPanda: I'm actually pretty interested to know if your approach will work or not
11:54 KongfuPanda GuShH, it's a hobby :) what's IK?
11:55 SleepersTide inverse kinematics
11:55 KongfuPanda oh
11:55 KongfuPanda naa
11:55 KongfuPanda at least not yet
11:56 KongfuPanda I'm just a crazy scientist
11:56 KongfuPanda learning basics how to make terminator in the future
11:56 robotustra KongfuPanda: data aquisition systems: http://mindtrans.narod.ru/daq_systems/daq_systems.htm
11:56 KongfuPanda I'm on holiday atm from the lab, so I'm visiting parents, eating sleeping all day. And decided to continue with my old robot project
11:57 SleepersTide robotustra: whoa, expensive
12:00 theBear http://i.imgur.com/sQ4qGlq.gif
12:01 SleepersTide robotustra: also somewhat weird designs, by the looks of it. I see one of those has an x86 CPU, that seems excessive and inefficient for the intended application.
12:02 SleepersTide actually several of them have x86 CPUs...
12:07 GuShH theBear: do they make ones with rotating swastikas?
12:07 KongfuPanda SleepersTide, I'll let you know if it works. But probably in a few weeks, maybe even months. I need to get some resistors first and stuff
12:09 theBear GuShH, probably, i was just impressed that it was the first i'd seen in mayeb 5 years that didn't have the default adafruit test/demo images on it
12:11 theBear pfft, silly google, they keep adding all this crap i could never possibly want, reshuffling my mailbox filters and auto-adding new/default tabs and matching filters to my 'main' inbox so i miss stuff like internet bills, but you think they could have something handy like a 'i wanna tag this market/playstore app and leave a note to myself to checkitout/test it at my leisure on my device later' ? noooooo
12:11 theBear o, that'd be far to useful ! asshats !
12:12 SquirrelCZECH theBear: you know... there are "todo apps"
12:12 SquirrelCZECH but it's true that I didn't ment one that could be useful
12:15 theBear yeah, and i've got a nice little 'notepad' app i can popup on my desktop i been using for exactly this (and other everyday notes) recently, but seriously, the number of times i've wanted something like i just described is getting ridiculous... browsing (market) on a mobile device just sucks, and even with a 'decent' app/taskswitch app it's WAY too painful to test one at a time, the other alternative is
12:15 theBear logging in and installing everything as you browse on the pc, then your mobile is swamped auto-installing all the stupid apps you clicked on, and you can't really workout if one is stupid and slow or decent anyway 'cos they're all on there !
12:15 SquirrelCZECH :D
12:15 uirrelCZECH just got to problem which is always interes
12:15 SquirrelCZECH when I bought my phone, it was like... really ast
12:15 SquirrelCZECH *fast
12:16 SquirrelCZECH now it's .... not powerfull enough :-/
12:16 SquirrelCZECH but I can't say that I use it more or...
12:16 SquirrelCZECH it just lags with basic usage :-/
12:24 MrCurious is it friday yet
12:33 robotustra sure, even Saturday
12:38 MrCurious i know the real cause that soviet broke up
12:38 MrCurious it was a ......USSR error
12:43 robotustra I also know
12:43 robotustra and my knowledge is better :)
12:55 GuShH robotustra: hard to say ... most people living "in it" are usually a lot less knowledgeable about the subject.
12:56 MrCurious wish i could re-visit teh moment where engineers thought putting a live camera into every god damn device would be a good idea
12:56 MrCurious that would be an ultimate troll moment
12:57 GuShH MrCurious: let's focus on reality
12:57 GuShH so less wishing, more of bashing robotustra.
12:57 MrCurious so every computer has a camera in it. i wonder if anyone ever does anything in front of their computer that they wouldnt want to be on teh web forever
12:57 MrCurious oh! good plan
12:57 GuShH I don't know, I don't use the camera at all
12:58 MrCurious doesnt mean that your computer isnt owned, and the hacker doesnt enjoy watching you. similar to watching a snake in a tank....
12:58 GuShH it always points to the trackpad portion of the laptop anyway...
12:58 MrCurious "i just like to watch him eat"
12:58 MrCurious your phone got a camera or 2 in it?
12:58 theBear yep
12:58 GuShH and?
12:59 GuShH your paranoia is increasing...
12:59 MrCurious well, if govt organizations like NSA, CIA, DEA (notoriously not savvy) can access them on demand, makes you wonder how long hackers been peeping
12:59 GuShH here's a roll of tape
12:59 GuShH use it wisely.
13:00 GuShH (cover the lenses)
13:00 MrCurious i have many rolls of black camera tape :D
13:00 MrCurious its also useful for taping up electrical connections
13:00 GuShH I don't tape up electrical connections
13:00 theBear well, if you believe that you should study computer science a little more
13:00 MrCurious i prefer shrink wrap or hot glue these days
13:01 MrCurious theBear: clarify?
13:01 GuShH hot glue with sprinkles?
13:01 GuShH quit using your wife's tools.
13:02 theBear they can't access cameras on demand you boob
13:02 GuShH wive's? sorry it's been a couple days since I've had any sleep
13:02 MrCurious i suppose a nice phone security feature would be a led bar graph showing its current power consumption would betray any ilicit monitoring
13:02 theBear and don't even THINK about linking me to any crazy websites or forums
13:02 GuShH BOOB
13:02 theBear it's more likely to betray any poorly written apps these days
13:02 theBear or fringe reception areas
13:02 SquirrelCZECH :-)
13:02 SquirrelCZECH you know
13:02 GuShH theBear: ideas on how to run some cheap cameras on the CHEAP? 50+ meters wiring costs more than the camera
13:02 SquirrelCZECH that is the reason
13:02 SquirrelCZECH why I just can't buy kinect
13:02 SquirrelCZECH it's awesome.... :-)
13:03 GuShH wifi is not cheap, so that's out of the equation. plus it's the least secure option
13:03 GuShH kinect .... why not just walk outside and play in real life
13:03 GuShH you dumb fck
13:03 SquirrelCZECH but I can't stand the feeling
13:03 SquirrelCZECH that there is something this smart
13:03 GuShH pretending to be dancing and moving around by yourself in front of a tv
13:03 SquirrelCZECH hmm
13:03 GuShH what kind of retarded dipshit do you have to be
13:04 SquirrelCZECH could you just stfu dumb fck? :-)
13:04 GuShH it's only meant for socially deprived lowlife scum.
13:04 uirrelCZECH found is as great thing and par
13:04 SquirrelCZECH :-)
13:04 SquirrelCZECH you know, two people in front of tv
13:04 GuShH dumb as fuck.
13:04 SquirrelCZECH choose a game, and finds who is best
13:04 GuShH go outside, play the real game
13:04 theBear GuShH, cat5, hacked up common mode baluney things, surprisingly effective, and one of these days i'll learn/discover enough to be able to make proper isolated transformers instead of sideways transformers
13:04 GuShH theBear: voltage drop would be massive
13:05 GuShH my brother too favours cat5 with baloons
13:05 GuShH I think coax is the way to go, but still pricey. the cat5 would let me run multiple cameras though, which lowers the cost down considerably
13:05 SquirrelCZECH GuShH: sure, always the better option :-P
13:05 theBear depends on how modern/current-drawey the camera is, but i decided long ago that if it ever became an issue simple ac stepup and local reg'd supply at the cam end would be fine... i even share a cable (power and pal) with ethernet, split halfway !
13:06 GuShH 380mA maximum at night
13:06 GuShH each
13:06 theBear also local powersupply at cam end can work if power is around
13:06 GuShH at over 50 meters... there's some drop there
13:06 GuShH without feedback and a proper psu things get messy
13:06 GuShH theBear: there is
13:06 theBear pfft, i run over that about 30meters now and it's been a while, but there's VERY negligible drop
13:06 GuShH I can't say whether it's safer to run remote power vs local
13:06 GuShH as you can always sever the data cables...
13:07 theBear course it is, isolated wallwart, yer laughin
13:07 GuShH no, safe in the sense of security
13:07 theBear oh, if yer worried about physical reliability/security, that's a bit different
13:07 GuShH of course, spray paint = no more camera
13:07 GuShH paint gun = no more camera
13:07 theBear general conensus among us in the cam-monitoring-project/software channel is to always disguise cameras, and if at all possible make them inaccessible also
13:08 GuShH to avoid the former, simply installing the cameras way out of reach is the way to go
13:08 GuShH heh, there are channels for this sort of stuff?
13:08 GuShH this is a relatively long term project of mine
13:08 theBear unless yer running a methlab or doing something REALLY heavyduty, a cam is much more likely to get stolen than painted or wires cut
13:08 GuShH it would've been short term if I had the budget
13:09 GuShH nothing like that...
13:09 GuShH (yet?)
13:09 GuShH No, I just need basic surveilance. The neighbour down the road has about 6 cameras outside (visible at least)
13:09 GuShH There are a couple other cameras I've noticed around a 3 block radius
13:10 GuShH They actually do work as deterrents
13:10 GuShH theBear: also some dipshit has been throwing his/her trash to the side of my property, and that's just not cool.
13:10 theBear mmm, even in these modern cheap-technology days fake cams and enclosures with flashing led inside etc are very popular for that reason
13:10 theBear that is NOT cool !
13:11 GuShH exactly, I need an "eye" so I can react to them.
13:12 GuShH I'd like to mount at least one camera on a tree, but I'm not sure how to run the wiring... down the trunk with some conduit, facing the opposite side of the camera?
13:13 GuShH it sounds trivial but in practice all these remote wires make it hard... specially since I can't dig a lot without ending up on the ground twisting in agony like a worm.
13:13 GuShH the other idea would be to use a zoom lens and mount the camera on the roof, making sure to clear out any wranches that may obscure the view
13:13 GuShH branches
13:13 GuShH what's a wranch...
13:14 theBear that's another reason i like this software, i can do arbitrary stuff, like when motion is detected currently it does something along the lines of "ssh userwithnopass@mydesktopmachine ~/motion-script.sh %C" %C would be the cam # , and the script has a simple case to maybe do nothing, maybe play a sound/alarm, maybe even popup a nice xnotification.... even works well as a doorbell
13:15 MrCurious GuShH: i am noticing how active you are here. do you do anything other than IRC? :P
13:15 theBear wranch, it's like a tree-part that fits bolts
13:15 GuShH MrCurious: ...
13:15 GuShH oh a wrench made out of a branch! wranch.
13:15 GuShH MrCurious: when I'm working on the PC I can IRC rather freely with multiple screens...
13:16 MrCurious ahhh what you working on
13:16 GuShH hmm you can get a 16 channel cctv pci card for about 100 bucks these days
13:16 GuShH low speed though
13:16 GuShH (here, I'm sure it costs 50 bucks over there)
13:18 GuShH quite frankly I'd use an old laptop as the server, for power consumption reasons... but I don't have any that are functional
13:19 GuShH not too happy with the DVRs they sell
13:21 MrCurious seems Egypt is broken again
13:26 theBear if you look carefully it's usually more like a 1 or 4 * 'tv framerate' capture chip with a fancy input multiplexer
13:27 GuShH yeah
13:31 theBear wtf ? there was an olympics last year ?
13:31 GuShH probably
13:32 theBear howbout that !
17:12 zap0 yeah, london
17:12 zap0 and it was teh dogs bollocks
17:22 MrCurious did you have some pints
17:22 MrCurious did you 'ave a nice bitter
17:22 MrCurious did you get right pissed
17:33 zap0 i got well mangled
17:42 MrCurious legless!
17:46 robotustra heartless
17:48 MrCurious pull me finger
19:51 Curious wields a Henry Kissinger (+3) doing 2 attacks for 15 rhetorical da
20:02 theBear pfft ! your voice isn't half velvety and smooth enough to wield a kissinger, not to mention you gotta practice your diplomacy a little more
20:03 theBear not that you're rude, but that man, my god he can placate people
21:25 MrCurious 1, 2, 3, 4 Egypt smells like civil war...
21:35 theBear meh, i met a few egyptians over the years, even had a gf for a while, they're all mad as cut snakes !
21:36 MrCurious NY has stop and frisk, SF has stop and fist...
21:36 theBear other countries don't care and are happy :)
21:44 MrCurious russia is going to enforce their anti-gay laws during the games
21:44 MrCurious there goes figure skating
21:45 zap0 manliest sport there is
21:45 zap0 only topped by rythmic gynmastics
21:46 MrCurious yeah
21:46 MrCurious russia's loss
21:46 zap0 yeah, just imagine the horrible world it would be without figure skating
21:47 MrCurious go figure?
21:49 theBear i ain't good at figure skating, tho i like jumpey spins and going backwards real fast in hockey skates
21:49 theBear oooh, and slide stopping
21:50 zap0 do you do jazz hands while doing it?
21:51 MrCurious i often do jazz hands while programming
21:52 MrCurious and before you ask, yes there is a disco mirror ball in every room of my house
22:09 MrCurious is it right arm pain or left arm pain that means heart attack?
23:16 theBear right arm mostly, more numbness spreading from the chest, but if you need a hospital it's quite a bit of pain, mild numbness is just bad circulation and you maybe been sitting funny'
23:16 theBear feel yer pulse, if it's irregular you want a doctor
23:19 MrCurious its king of a hybrid between a samba and a bossa-nova
23:21 MrCurious hmmmm plant wars....
23:21 MrCurious Bamboo vs kudzu which will win
23:22 theBear ahh, like bender, nice
23:23 MrCurious finally, an OTC painkiller is removing the pain
23:24 theBear mmm, they can be good
23:24 theBear even for my cripplage most of this year i've been 'special' pills at the end of the day and otc so i can walk during the day... some of them aint bad
23:25 MrCurious i have no idea what i did. its like carpel tunnel out of control. palm is tingling like mad (typical for carpel tunnel)
23:25 MrCurious and upper arm feelz like i got a few hertz-doughnuts
23:28 theBear stand up, have a stroll around the house, move yer armz around a bit... getting too intense at computering tends to lean you forward and long-term-tense all kindsa chest and back and arm muscles that can cause stuff like that, tho if it REALLY hurts, you probly should see a doctor
23:28 theBear and don't drive yourself, some asshole ripped the bottom half of his body apart and almost killed me and my mum doing that on a highway.... frickin asshat !
23:29 MrCurious eeek
23:29 MrCurious i will see doc fri (day off) if it doesnt resolve