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[02:42:51] <z64555> so anonnumberanon. Looks like I'm getting serious about the quad
[02:43:12] <z64555> or at least, making sure my collegues don't get the wrong idea from an old paper.
[02:43:14] <z64555> sheesh.
[03:13:53] <z64555> I need to learn UML, or otherwise some sort of formal design convention
[03:33:19] <z64555> I wonder how good those MEMS magnetometers are at receiving radio signals
[03:55:30] <deshipu> aren't they too heavy for that?
[03:58:56] <z64555> er, heavy?
[04:00:15] <deshipu> they are mechanical devices
[04:00:23] <deshipu> with a moving part
[04:03:01] <z64555> a B field is a B field... so it would be a matter of signal strength in terms of uT and what the resonant frequency of the vibrator is
[04:10:26] <z64555> pretty sure it would be some low frequency, but I don't see anything in the datasheet I pulled up that suggests it
[07:50:59] <Jak_o_Shadows> Where'd I put my calipers
[07:52:06] <deshipu> under the doom melon
[07:53:47] <theBear> when did i buy a doom melon
[07:54:01] <theBear> also i suggest finding calipers now, cos mine been misplaced for a LONG time
[08:08:04] <Jak_o_Shadows> haha.
[08:08:15] <Jak_o_Shadows> They're only cheap ebay ones anyway. I found them as well.
[08:08:26] <Jak_o_Shadows> I think it's possible to charge my old nokia brick phone from usb, which is cool
[08:08:43] <theBear> mine were 2 dollar shop and plastic, but that's not the point <grin> they did 10ths of a mm, albeit a potentially varying start-point mm
[08:08:58] <theBear> and of course you REALLY didn't wanna press too hard, way more than real ones :)
[08:09:25] <theBear> old nokias with dc-jack connectors were all 3.7v as i recall, can dig 5 or 10 outta the bucket if yer really wanna know :)
[08:09:37] <Jak_o_Shadows> Yeah, mine are steel, but thats the main problem with them. You can alter it up to 0.2 mm.
[08:09:48] <Jak_o_Shadows> haha. The wall-wart says 5.2V (through I'd check of course)
[08:10:01] <theBear> heh, plastic ones of the same dimensions goa lot mroe than .2mm if you push :)
[08:10:11] <theBear> and that's if you don't damage the tip bits
[08:10:30] <theBear> it had a metal shaft up the back of the ruler bit to kinda pull it all together :)
[08:10:39] <theBear> they
[08:10:47] <Jak_o_Shadows> I'm glad ebay exists.
[08:10:49] <theBear> i'm still sure i'll find them
[08:11:04] <Jak_o_Shadows> Through, I swear I used ome 300mm ones once.
[08:11:21] <theBear> mmm, i find these days there ain't much china can't supply me thru dx or ali or even a local real-shop cheap enough to make me smile
[08:12:04] <theBear> mainly i'm bitter cos ebay seem to think you should login every year or two to keep yer account and associated good feedback ! 'sif
[08:12:26] <Jak_o_Shadows> Yeah. I've been logged out in firefox. SO I opened crhome
[08:12:54] <theBear> and i can't remember if the first one i lost was rupret_the_monkey_boy or rupert_the_crazy_bear but either way, i'm pissed off ! i had like, double digits of green ticks !
[08:13:21] <theBear> i DID stop checking that email and logging in for 3-5 years maybe, but that's irrelevant, i'm still me !~
[08:14:40] <SpeedEvil> theBear: might you have unprocessed boxes with invoices in?
[08:15:10] <theBear> unprocessed ? err, regardless of what that means here, i don't think so
[08:15:21] <SpeedEvil> I mean you have not thrown out the invoice
[08:15:25] <theBear> i still got a mobo and a p2 slot1, and maybe some ram i got
[08:15:50] <theBear> i tend to keep financial documents filed sensibly, in order to not do tax returns with them
[08:16:20] <theBear> i can produce receipts for 80gb hd's and amd k5 proc/mobo combos
[08:16:54] <theBear> i got that mobo before i finished school from teh place i did work experience/placement
[08:18:03] <theBear> i gotta ask some people what kinda accent i got... some words the google lady in my fone just cannot seem to understand, tho she good with alotta stuff
[08:18:26] <theBear> hmm, i'm finding it very hard not to see how she deals with "alotta stuff" after saying that
[08:18:46] <theBear> sneaky bitch proper-grammer-ed it !
[08:19:37] <theBear> SpeedEvil, oh yeah, you see what i said about some dude asking to be unbanned in the other cahnnel maybe 20 mins ago ? i have no strong feelings except mirth reviewing his situation in the logs
[08:19:55] <SpeedEvil> no
[08:20:40] <SpeedEvil> ah
[08:20:56] <SpeedEvil> It's depressing how bad some people are at asking questoins
[08:22:29] <theBear> it's shocking how they always ask to come back, but never show any remorse or regret, or offer any evidence to suggest they deserve another chanve
[08:22:30] <theBear> chance
[08:23:41] <theBear> heh, i noticed young mikey (xin most recently, mjcd the last time he was around the irc lands) got hisself banned again, hehe, he never learns (he used to live in my spare room for a few months, good boy outside of irc :] )
[08:26:47] <theBear> orright then, lets see if we can jumper some life into a drill and get a couple holes made without digging out the big heavy noisy real drill (the best battery drill packs are "under construction" at the moment, then there's just the ancient cheap noname hex-hole-no-chuck slow-mo screwdriver gun thing and err, the real drill which is mostly just too noisy for my mood, or indoors generally, tho i do
[08:26:47] <theBear> know where the muffs are at ..)
[08:27:04] <SpeedEvil> Toilet paper.
[08:27:13] <SpeedEvil> You can with practice do really good earplugs.
[08:27:47] <SpeedEvil> Fold a sheet four times or so lengthways, and then tightly roll up till the required diameter is reached, and then tear off.
[08:27:55] <theBear> the massive 0-16v or so 15a/25a short-term bench supply runs the battery drills pretty good if you can aim the clips onto the battery terminals, and the wires are a lot lighter than any battery i can afford a drill to contain
[08:28:04] <SpeedEvil> Slightly dampen end and form to appropriate shape.
[08:28:37] <theBear> yeah, i used to be a soundguy, i been there, but i also like my old building muffs, big soft pads and frankenstein style bolts poking out either side where they been un-cheaped long long ago :)
[08:28:50] <SpeedEvil> yeah
[08:28:57] <theBear> even know where a few packs of fresh cheapy earplugs are at the moment, rare times :)
[08:29:01] <SpeedEvil> :)
[08:29:51] <theBear> gotta drill something on the car some day soon, been musing about a lighter-socket -> drill batt cable, or just charging up the old-person-mobile deep cycle (the one that is still relatively non-dead) and taking that out with some tiny jumper leads hanging off :)
[09:26:17] <rue_house> making electric motor kits for kids
[09:26:47] <rue_house> my cnc machine can drill the 4 holes in about 3 boards in the time it takes the 3d printer to make 1 battery holder
[09:27:28] <rue_house> I'm not sure, by that count, who is slower
[10:43:39] <Frank69945> Guys do you think that this field of programming AI and working on robotic components will expand sooner or later?(in terms of more jobs), because I was looking for jobs related to robotic.* and it seems that I don't find too much at the moment
[10:49:19] <deshipu> actually ai and (industrial) robotics are completely unrelated fields
[10:49:49] <deshipu> there is much more ai application in the data processing industry
[10:50:16] <deshipu> but they mostly want mathematicians and statisticians
[10:50:48] <deshipu> and the industrial robotics mostly wants mechanics with some automation experience
[10:52:13] <deshipu> not much room for newbies
[10:53:38] <doomlord_> maybe pursue AI and direct other efforts toward the maker community?
[10:55:19] <deshipu> the maker community, while certainly vocal these days, is not really large enough to support a large workforce
[10:55:45] <doomlord_> yeah my suggestion is really 'robotics as a hobby'
[10:55:57] <doomlord_> whislt pursuing a software job
[10:56:14] <deshipu> that's what I do
[10:56:52] <deshipu> it mostly works, although since I program as my day job, I often build robots and put off programming them, because that's too boring :)
[10:57:40] <doomlord_> what do you make of the movidius fathom usb stick
[10:57:45] <doomlord_> looks like an interesting idea to me
[10:58:26] <deshipu> I can't help to ask: why usb?
[10:58:56] <doomlord_> they have made something that can be stuck in any controller board with a usb stick, or plugged into a laptop
[10:59:18] <deshipu> "any controller" doesn't necessarily have a usb host
[10:59:26] <doomlord_> it only needs enough bandwidth to take an image (usb cameras evidently work) and get classification back
[10:59:39] <doomlord_> usb is something available on a wide variety of devices
[10:59:55] <deshipu> but not necessarily on the cheaper microcontrollers
[11:00:00] <doomlord_> it does seem like a hack but i think this is good for the maker community
[11:00:37] <doomlord_> their real goal is to have the movidius chip in SOCs but they have to wait for that integration to happen
[11:00:48] <doomlord_> ^modividus core in SOCs
[11:01:26] <doomlord_> supposedly its 10x efficiency vs a gpu for conv-nets
[11:01:30] <doomlord_> energy efficiency
[11:02:11] <doomlord_> one of my biggest fears is dedicated AI hardware not being available to the maker community. this stick is a step in the right direction IMO.
[11:02:18] <deshipu> yeah, I would expect it to be integrated with a camera, though
[11:02:42] <deshipu> doomlord_: have you heard about OpenMV?
[11:02:50] <doomlord_> no; let me google.
[11:03:29] <deshipu> it doesn't do neural networks, but it does do some image processing, haar cascades, face detection, etc.
[11:03:58] <doomlord_> ok thats going for the same space, interesting.
[11:04:11] <deshipu> the idea is that you program it to do whatever you need done, and send the results over serial/i2c/whatever to your actual microcontroller
[11:04:34] <deshipu> I have two of them here for testing
[11:04:42] <doomlord_> nice.
[11:05:07] <deshipu> since the camera is build-in, you don't have to worry about the transfer speeds
[11:06:07] <doomlord_> does make sense. the movidius thing would be better if it had a camera input
[11:06:10] <deshipu> I think that this approach -- intelligence embedded in the sensors themselves, is getting more and more popular now
[11:06:16] <doomlord_> definitely
[11:06:34] <deshipu> like the bosch IMU unit, that does the kalman filter and integration internally, and just gives you the position
[11:06:46] <doomlord_> thats the whole idea of the movidius chp (the usb stick is just one product). their chip has potential for 6 camera interfaces or somethign
[11:06:58] <deshipu> or some sound recognition shields
[11:07:41] <deshipu> it's like playing with blocks then
[11:07:59] <doomlord_> literal plug and play
[11:16:30] <veverak> hmm
[11:16:32] <veverak> chmm
[11:16:34] <veverak> sounds cool :)
[11:17:58] <deshipu> the sound-recognition board had a built-in microphone, because getting it all tuned together is so difficult
[11:18:08] <deshipu> and that works well, actually
[14:33:15] <Phantomex> Greetings. I was researching artificial muscles and found this recent paper using heat-activated nylon
https://www.disneyresearch.com/publication/high-performance-robotic-muscles/
[14:33:33] <Phantomex> Which got me thinking about how to improve their relaxation speed
[14:35:03] <theBear> isn't that old news by now ?
[14:35:32] <Phantomex> Oh yeah, but I figure silver-coated nylon is cheap enough to experiment with myself
[14:35:42] <Phantomex> As opposed to servomotors or pneumatics
[14:36:24] <Phantomex> With enough muscles for the human hand's full range of motion (20 pairs of opposing muscles) all packed into a "forearm", I figure liquid cooling could cool the nylon fast enough
[14:36:26] <theBear> servos are cheap, pneumatics not so much, mostly cos they so damned rare outside of err, well anywhere
[14:36:47] <theBear> how you get it contacting enough ? nylon dont' have low thermal resistance
[14:37:28] <Phantomex> silver coated nylon in convoluted braids
[14:37:31] <Phantomex> not sure
[14:37:52] <Phantomex> but hypothetically
[14:38:06] <Phantomex> would the flowing coolant inhibit expansion?
[14:38:26] <Phantomex> Would they need some way to reduce their conductivity when being heated for contraction?
[14:38:34] <Phantomex> *thermal conductivity
[14:39:07] <Phantomex> I was thinking the "veins" carrying the coolant might contract to restrict flow to active muscles
[14:39:45] <Phantomex> But I'm not sure how to achieve that contraction
[14:42:39] <Phantomex> It's an engineering problem really. You've got a bunch of cables that need to get hot or cold on command.
[14:42:45] <Phantomex> I couldn't find an engineering irc though
[14:42:55] <Phantomex> Figure someone in here might have insight.
[14:52:37] <Snert_> I wanna try muscle wire.
[14:52:50] <Snert_> will get to that in a couple months I guess.
[16:19:18] <xx88xx> hi, i want to build a little robot that has 3 wheels.two wheels attached to one motor and the steering is done by one wheel that attached to servo,so the servo control the steering wheel.does someone know where i can buy this steering wheel?what is the name of this wheel that is steering by servo so i can search for it? thanks
[16:20:43] <deshipu> xx88xx: probably most furniture shops
[16:21:11] <deshipu> xx88xx: they put those wheel on chairs and cabinets
[16:21:16] <xx88xx> deshipu, yep but i don't know how to refer to this part.can you suggest a name please?
[16:21:26] <deshipu> swivel wheel?
[16:21:32] <xx88xx> ill try that
[16:22:11] <deshipu> http://www.aliexpress.com/wholesale?SearchText=swivel+wheel
[16:23:21] <deshipu> probably not the best choice, though, as the axis is not over the center of the wheel
[16:23:28] <deshipu> so it will be hard to move while standing
[16:25:16] <xx88xx> deshipu, yep i have something similar to:
http://tinyurl.com/h3lmbru but i thought maybe there is something that is ready to be connected to the servo.
[16:55:32] <deshipu> haven't seen anything like that
[16:56:03] <deshipu> most robots have that wheel casting, and have two motors for the two other wheels -- steering like a tank
[16:56:25] <deshipu> simplifies things greatly, as then you don't need a differential drive for the drive wheels
[22:06:26] <RustyShackleford> I'm looking for a way to create a motorized adjustable height desk
[22:06:53] <RustyShackleford> um hold on, lets fire up Paint for a second
[22:07:18] <RustyShackleford> one of the problems I see is where to find these parts. It won't be cheap if I need them custom made
[22:09:23] <theBear> RustyShackleford, there's a "cheap" similar thing withut a motor but pre-loaded spring assist to make it weigh almost nothing on the market
[22:09:32] <theBear> varidesk i think is the brand
[22:09:33] <theBear> have a look
[22:10:05] <RustyShackleford> i'll look that up
[22:10:17] <RustyShackleford> in the mean time, here's a (crude) sketch
[22:10:40] <RustyShackleford> If I had some "legs" with teeth cut like that, and a gear to mesh with it
[22:10:55] <theBear> probly not TOO hard to motorise if yer wanted too, but it's marketed for weak office workers of any sex to be able to "effortlessly" lift the whole work surface including keyboards and monitors and crap
[22:11:12] <RustyShackleford> I could get a stepper motor and it would be pretty easy
[22:11:17] <theBear> if you had some legs like that, i'd send you to a doctor <grin>
[22:11:56] <theBear> steppers generally ain't super-strong for their size/price, more a thing you use if you need to count (sub)rotations accurately than for strength
[22:12:17] <RustyShackleford> well you would want to count sub rotations
[22:12:23] <RustyShackleford> i'm picturing one on each side
[22:12:45] <theBear> you would ? i woulda thought dc motor spinning hard and fast geared down and just end stops or at most ome simple encoder
[22:12:57] <RustyShackleford> I dunno I'm not an electronics/robotics guy
[22:13:21] <theBear> i spose spring assist is still an option, but without it a stepper got no chance of lifting yer average desk content, or even a bit of wood desk-sized
[22:13:32] <theBear> err, on a sub-rotation/single turn that is
[22:13:34] <RustyShackleford> but I know a shop with all kinds of salvage electric motors and junk. If I knew what to look for, I could probably find it
[22:13:49] <z64555> this is mostly mechanics. but yeah, I'd go with a motor with gear reduction
[22:14:14] <theBear> lotta mechanicals in this world, almost everything best to find a similar motion and copy how it was approached
[22:14:59] <RustyShackleford> there are standing desks at work, no idea how they work. Can't exactly tear it apart to see lol
[22:15:14] <RustyShackleford> almost looks like its hydraulic
[22:25:36] <theBear> for smallish things i seen hydraulic-looking cylinders even wtih little remote control lock buttons on a long line, thing like car-boot raisers
[22:25:53] <theBear> kinda spring + shock-absorber in one
[22:27:52] <z64555> yeah, linear actuators
[22:28:09] <z64555> they use em for satellite dish positioning
[22:28:15] <theBear> nah
[22:28:22] <z64555> no?
[22:28:41] <theBear> just like a sprung slow-door-closer thing, like yer car boot has to assist you and so it doesn't fall on your head
[22:28:45] <theBear> there 1 either side
[22:28:57] <z64555> oh those are air springs
[22:29:02] <theBear> tho for him linear actuator makes sense
[22:29:43] <theBear> air springs you sure ? damned small chamber for that much travel and smooth spring-strength from end to end, either way they got air shock-absorbers of some kind in there too
[22:30:57] <z64555> that's what my dad called them
[22:39:43] * z64555 grumbles
[22:39:52] <z64555> air conditioner is going out
[22:57:08] <rue_shop5> usually half way out the window anyhow
[23:05:28] <z64555> I know! It's just there. teetering on the edge...
[23:15:29] <rue_house> *bunt*
[23:42:54] <orlock> rue:
http://en.crypt.net.au/Bracket/20160511_135259.jpg
[23:53:23] <rue_shop5> kinkey
[23:53:32] <rue_shop5> }:]
