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[05:16:57] <SpeedEvil> http://imgur.com/gallery/70I9euV
[05:21:13] <Jak_o_Shadows> Yeah, I saw that
[05:21:30] <Jak_o_Shadows> Braver than I am to let it that near your face
[05:23:31] <kiloreux> Hilarius
[08:15:39] <SpeedEvil> http://imgur.com/gallery/TKkFPnS
[09:49:33] <spacer> Anyone know of a lightweight robotic arm?
[09:50:07] <pokmo> hi
[09:50:20] <pokmo> does anyone know if there's any mechanism that could connect the red and yellow discs together?
http://i.imgur.com/qiaELmj.png
[09:50:26] <pokmo> the axis of red is fixed and the "orbits" around red
[09:50:28] <pokmo> the outer ring is fixed housing
[09:50:54] <pokmo> i wonder if a spring is needed
[09:51:44] <spacer> Try a universal joint
[09:52:23] <pokmo> spacer, hmm but the rotation is only on one plane
[09:54:14] <pokmo> i wonder if i should use a telescopic mount spring, like a sprung shock absorber
[09:54:42] <pokmo> but then, the yellow disc makes contact with the outer ring, so i wonder how friction could be reduced there
[10:00:19] <spacer> You could try using bearings on the yellow disc
[10:00:29] <robopal> pokmo, the red and the yellow circles are connected with a beam with a bearing at the ends? no?
[10:01:02] <pokmo> robopal, well, so far i'm just using a piece of spring. no bearing
[10:01:22] <pokmo> spacer, you mean on the bottom of the yellow disc?
[10:01:47] <spacer> Or the inside of the outer disc
[10:01:47] <robopal> where do you connect the spring?
[10:02:18] <pokmo> but because the red disc is eccentric wrt the outer ring, the distance between the red and yellow will change as red rotates
[10:03:13] <robopal> ah ok not in the center
[10:03:51] <spacer> You could use a sliding mechanism
[10:03:57] <pokmo> here's a better portrayal
http://i.imgur.com/FeqsPlt.png
[10:04:05] <pokmo> i'm using two springs at the moment (grey)
[10:04:11] <spacer> That changes lenght
[10:04:21] <pokmo> i could drop the springs completely though. i'm open to any alternatives
[10:04:48] <spacer> Use a slider
[10:05:34] <robopal> they are compression springs?
[10:05:37] <pokmo> spacer, as in, like the outer ring be a rail and yellow be a roller essentially?
[10:05:40] <pokmo> robopal, yes they are
[10:05:55] <pokmo> robopal, they're like RC car suspensions
[10:06:07] <robopal> ok
[10:06:13] <spacer> Yes
[10:07:20] <pokmo> i'm actually hoping to leave the centre of the yellow disc free
[10:08:13] <pokmo> i thought about putting two bearings on the bottom of the yellow disc.
[10:09:04] <pokmo> but when the red rotates, e.g., clockwise, the front bearing would be pressed against the wall harder than the back bearing
[10:09:38] <spacer> Does the yellow rotate?
[10:10:10] <pokmo> spacer, no it doesn't
[10:10:23] <pokmo> it "orbits" around red though
[10:10:43] <pokmo> sorry, let me rephrase it
[10:10:52] <spacer> Then you don't need the bearing. Just ensure lubricant
[10:11:01] <pokmo> it rotates to the extent that it always faces red
[10:11:07] <pokmo> like the moon to earth
[10:11:29] <pokmo> but it doesn't rotate freely like a bearing
[10:11:45] <z64555> Does the outside ring rotate?
[10:11:54] <spacer> Can't you use a lubricant
[10:11:56] <pokmo> z64555, no it doesn't. it's fixed
[10:11:59] <pokmo> spacer, yeah i thought about that
[10:12:12] <z64555> Ok, so the only axis is the red circle
[10:12:21] <pokmo> i'm just not sure how good it'd be to rely entirely on lube
[10:12:38] <pokmo> it'd depend on the force of the springs, right?
[10:12:46] <pokmo> z64555, yes that's correct
[10:12:59] <pokmo> z64555, and it's eccentric w.r.t. the outer ring
[10:13:07] <z64555> right
[10:14:07] <pokmo> if i were to just use lube, should yellow be a disc with a flat edge or a disc with a large fillet?
[10:14:51] <z64555> a simple compression spring should do the job. Can use a telescoping sleeve if you're concerned about it arching
[10:15:02] <spacer> A fillet would be preferable
[10:15:33] <spacer> Yeah I was going to say a telescopic sleeve
[10:15:42] <pokmo> z64555, i'm currently using 2 RC car sprung shock absorbers. do you know if there're better parts for that purpose?
[10:15:57] <z64555> can't think of anything at the moment, sorry
[10:16:15] <pokmo> spacer, toy car sprung shock absorbers?
[10:16:38] <z64555> uh. wait a minute
[10:16:54] <z64555> shock absorbers aren't springs
[10:16:58] <pokmo> spacer, but if it has a large fillet, would that not put too much stress on the face?
[10:17:05] <spacer> You've seen the telescopic forks used on bikes?
[10:17:06] <pokmo> on the contacting face
[10:17:18] <pokmo> if it was flat, the force would be distributed across a wider surface, right?
[10:18:43] <pokmo> z64555, i mean something like
http://i.imgur.com/FeqsPlt.png
[10:18:46] <pokmo> but with no fluid inside
[10:18:59] <z64555> ah, that should be perfect then
[10:19:22] <z64555> (wrong .png btw)
[10:19:28] <pokmo> the ones i have are way dodgier. just a piece of cheap black lastic
[10:19:39] <pokmo> oops
[10:19:49] <pokmo> z64555, sorry:
http://www.integy.com/C25124BLUE.jpg
[10:20:10] <z64555> yes :)
[10:20:14] <pokmo> spacer, yes i have. on MTBs
[10:20:42] <spacer> Yeah similar to the parts you've shown
[10:21:25] <pokmo> the issue i have is that most of these expect the axles to slip
[10:21:57] <pokmo> whereas, they should be fixed in my setup - i think
[10:23:11] <z64555> if you use two of them it shouldn't make a difference
[10:23:18] <pokmo> is it better to rub metal against metal or plastic against plastic?
[10:23:30] <pokmo> i've heard that plastic against metal might be better?
[10:23:45] <pokmo> i'm just worried that if i just use lub and no bearing, the yellow disc will quickly wear out
[10:23:48] <spacer> Metal against meta
[10:23:54] <z64555> check coefficients of friction
[10:24:10] <z64555> Some plastics have lower coefficients than metals, i think
[10:24:11] <pokmo> mixing materials seem to give lower coefficients
[10:24:34] <z64555> but you have to also look at durability vs. heat, UV exposure, etc.
[10:25:05] <pokmo> there won't be direct sunlight
[10:25:12] <pokmo> heat, well, probably from the friction
[10:25:27] <z64555> brass/iron is a long time combo
[10:25:40] <z64555> or brass/steel
[10:25:44] <pokmo> i'm looking at
http://www.tribology-abc.com/abc/cof.htm
[10:26:50] <z64555> metals are generally more durable than plastics, only the more expensive plastics compete there
[10:27:14] <pokmo> steel-steel gives 0.5, but platic-metal gives 0.4 max.
[10:27:17] <pokmo> *plastic
[10:28:08] <pokmo> steel-cast iron gives 0.2. much lower than steel-steel for some reason?
[10:28:32] <pokmo> steel-steel is almost the same as steel-wood
[10:28:34] <z64555> cast iron is bumpy and sacrificial
[10:28:40] <pokmo> is steel that bad?
[10:29:33] <pokmo> z64555, yeah, but it's still lower than steel-steel though
[10:29:38] <pokmo> steel isn't bumpy, right
[10:30:09] <z64555> its less bumpy, i believe
[10:30:32] <z64555> My observation about cast iron being "bumpy" is from using a cast iron skillet :)
[10:30:51] <pokmo> but in the setting i described, should the yellow disc have a flat contact surface (like a normal ring) or should it have a large fillet
[10:30:55] <z64555> also some cast iron chassis for a jukebox
[10:31:00] <pokmo> would a large fillet reduce friction?
[10:31:29] <pokmo> or would the concentrated pressure increase friction even
[10:31:32] <z64555> eh, which direction we talking here
[10:31:46] <pokmo> z64555, sorry, as in, the design of the yellow disc
[10:32:08] <pokmo> i wonder if it's better for it to have a flat contact surface, like a tyre
[10:32:23] <pokmo> or should it have high fillet, like a donut
[10:32:51] <z64555> so between the flat of the disc and the rim?
[10:32:56] * z64555 gets all the terms wrong
[10:33:11] <pokmo> z64555, yes that's right
[10:33:44] <theBear> cast iron can get a lot "nicer" than olde-worlde style stuff is, but iron alone is a pretty shitty kinda metal... that's why you always see steel kinda alloys and no iron arond and about
[10:33:46] <pokmo> because yellow won't be rotated but slide around
[10:33:52] <z64555> It'll increase the contact pressure for sure, but it may assist in debris removal
[10:34:18] <pokmo> oh, almost forgot about debris
[10:34:44] <z64555> also have a nice place for the lubricant to stick to
[10:34:53] <theBear> hehe, eccentric describing mechanical stuff always makes me giggle
[10:35:30] <pokmo> are there existing applications that already do something similar, i.e. sliding a part around a round ring
[10:35:30] <z64555> also
[10:35:36] <pokmo> without bearings
[10:35:37] <theBear> ooh, that friction coefficient page is good
[10:35:54] <pokmo> theBear, not sure how accurate it is though
[10:36:17] <z64555> Having a fillet allows the disc to move up an down a little bit while still maintaining contact with the ring
[10:36:21] <pokmo> z64555, a nice place for the lubricant to stick to - what do you mean?
[10:36:23] <theBear> depending on context that may be called a bush or damn, another word i hadn't forgotten a minute ago
[10:36:39] <theBear> damned sleepy ead
[10:36:41] <pokmo> the outer ring has a thickness (around 1cm)
[10:36:46] <theBear> head
[10:36:54] <pokmo> so i thought i could just rub lubricant on it
[10:37:14] <robotustra> https://www.youtube.com/watch?v=8p5uDf9i_Yc&feature=youtu.be
[10:37:19] <theBear> i haven't caught up yet, but lubricant isn't magic.... put it between two flat surfaces and they squeeze it out sooner or later
[10:37:42] <anonnumberanon> Sup.
[10:37:44] <z64555> Having a fillet allows a sort of primative resevoir of lubricant
[10:38:06] <theBear> a bit of a resovoir kinda thing helps a lot tho, for example how ball bearings have "spare" grease around the balls in the spare room
[10:38:14] * z64555 isn't a mechanical engineer, though
[10:38:41] <theBear> heh, eccentric fillet, i hope i hear someone sa that one day... it'll make me think of a madcap wacky fish or chunk of cow perhaps
[10:38:42] <pokmo> z64555, but is it a reservoir though? does the lubricant shift?
[10:39:39] <pokmo> theBear, by spare room, do you mean the gap between the balls?
[10:39:58] <theBear> if a lubricant is appropriate for an operating temperature, it'll usually be at laest barely non-viscous enough at that temp to move around and slide out of any resovoir to where it is needed
[10:40:00] <theBear> pokmo, yeah
[10:40:36] <pokmo> so in my case, i should lube both the yellow's fillet and the outer ring
[10:40:52] <pokmo> and hope that it won't get squeezed out by the springs
[10:41:16] <spacer> Just the outer ring should work
[10:41:17] <pokmo> by the force exerted by the springs
[10:41:21] <theBear> pokmo, and often beside them... ball bearings with seal/covers or integrated ones like cones in a bike wheel (probly old car wheels too,) or a bike headstem tend to just fill any space with goop, also helps to "block"outside debris if it gets taht far
[10:41:40] <pokmo> theBear, i see
[10:42:08] <theBear> i still not read back enough to be 100% sure what we talking about, but i tempted to say the springs won't be an issue so much as the change in available space/volume when they move
[10:42:12] <pokmo> spacer, right. but will lubing the fillet potentially be harmful?
[10:42:56] <spacer> Not in anyway I can see
[10:42:56] <pokmo> are ball bearing balls individually lubricated?
[10:43:02] <z64555> what's this mechanism for, anyway?
[10:43:13] <theBear> how you mean individually ?
[10:43:22] <z64555> lol.
[10:43:30] <spacer> You can get self lubricating bearings
[10:43:41] <theBear> thanks <grin>
[10:44:34] <z64555> those have lubricant impregnated into the material of the balls themselve. (I can't think of any wording that can't be spun dirty...)
[10:45:05] <pokmo> lol
[10:45:32] <z64555> think of it as a sort of alloy
[10:45:55] <theBear> interesting... what kinda material they use, just some kinda porous metal or other material, perhaps even sacrificial balls ?
[10:46:10] <spacer> They make them using powder metallurgy
[10:46:22] <theBear> i spose it doesn't only apply to balls conceptually either (yeah me too, i'm just taking the high road for a rare change and ignoring the balls :)
[10:46:25] <z64555> sacrificial, porous, or as spacer mentioned using compressed metal powder
[10:46:38] <theBear> heh, even that bit in brackets sounded bad
[10:46:57] <theBear> cool, something new every day, well, 2 things now and the day is only 20 minutes in
[10:47:10] <pokmo> interesting
[10:48:43] <z64555> pokmo: you haven't answered my question
[10:49:31] <spacer> Has anyone heard of a lightweight robotic arm?
[10:49:42] <theBear> sure, you just mentioned one then too
[10:49:49] <pokmo> z64555, oh! sorry. it's for a simple motorised curve drawer
[10:49:50] <theBear> but lightweight is very subjective
[10:50:00] <theBear> heh, for storing curves eh
[10:50:02] <z64555> neat
[10:50:07] <pokmo> z64555, the red and the yellow holds a pen each
[10:50:36] <theBear> could probly store round tuit's in there too
[10:50:48] <pokmo> and the distance between the red and the yellow are supposed to be adjustable
[10:51:12] <spacer> Like less than 5 kilos
[10:51:24] <z64555> by adjusting the size of the outside ring? or by changing the eccentricity of the red disc?
[10:52:02] <pokmo> z64555, the latter. the outer ring is fixed. the eccentricity is controlled by a motor
[10:52:13] <theBear> spacer, where you going with this ? also remembering that robot arms ain't a fixed concept like people arms, and that robots come in all kinds of sizes and strengths
[10:52:32] <z64555> ...so do people arms, tbh
[10:52:39] <z64555> just sayin ;)
[10:53:13] <theBear> it's true, heck, my ankle doesn't do stuff much these days, i should be as aware as anyone
[10:53:19] <theBear> ankles are part of the arm right ? <grin>
[10:53:27] <spacer> I need something lightweight to be attached to a tree climbing bot to cut fruit
[10:53:48] <theBear> damn, that's ambitious
[10:54:10] <z64555> if it's an olive tree, then just give it a good shake
[10:54:13] <theBear> what will backpackers do for work ?
[10:54:47] <spacer> These are coconut trees
[10:54:50] <theBear> i spose they be fine if they know how to service robots
[10:55:18] <pokmo> or catch coconuts
[10:55:34] <theBear> ii've got a lovely bunch of coconuts
[10:55:54] <theBear> what's the deal with "drinking coconut"s anyway ... why they so damned hard to open ?
[10:56:17] <z64555> pokmo: Since your mechanism will be drawing, I'd suggest trying to keep it dry as much as you can. the brass/steel combination should be a good start
[10:56:23] <pokmo> spacer, is a dremel too heavy for your bot?
[10:57:29] <z64555> theBear: just hack at it with a sizable machete :)
[10:57:35] <pokmo> z64555, i'll definitely try that combo
[10:57:50] <pokmo> probably a steel outer ring and a brass pen holder
[10:58:00] <spacer> Doesn't have enough degrees of freedom
[10:58:30] <z64555> spacer: shears or saw?
[10:58:44] <spacer> Saw
[10:59:01] <z64555> so something like a jigsaw, then
[10:59:19] <spacer> Yeah
[11:00:23] <theBear> z64555, heh they ain't so common round these parts, specially in the suburbs... think a few bad-apples misused them on the other side of the country and with that liberal media and their field days, you know <grin>
[11:00:59] * z64555 shakes his head
[11:01:47] <z64555> spacer: My lazy google search isn't turning up anything that looks particularly light weight
[11:02:09] <z64555> So, you'll probably have to fab one yourself. Could start with an Erector set
[11:02:16] <spacer> Yeah I tried google
[11:02:35] <theBear> rue has made some very lightweight moving bits, among other times when he was messing with the air-bladder/balloon style "muscles" ....
[11:02:39] <theBear> not sure if he did a whole arm
[11:03:10] <spacer> I have to look into the feasibility of fabricating one
[11:07:16] <anonnumberanon> theBear, did you watch my epci robot footage yet?
[11:07:21] <anonnumberanon> okay, not that epic..
[11:07:26] <theBear> umm, no ?
[11:07:57] <anonnumberanon> <h3>
[11:07:57] <anonnumberanon> <font color="red">10-16-2015</font> Finished robot frame with servos, 17DOF humanoid biped robot, re$
[11:07:57] <anonnumberanon> </h3>
[11:08:10] <theBear> wow, nice webpage
[11:08:14] <anonnumberanon> jk
[11:08:20] <anonnumberanon> =)
[11:08:27] <anonnumberanon> https://www.youtube.com/embed/01HExZuUz9s
[11:11:04] <theBear> ooh, resposive, nice
[11:12:10] <theBear> hmm, did you do the psychadelic edge-detect thing, or is my player dodgy again ?
[11:12:15] <anonnumberanon> It wants to do things but right now it is not being told how to correctly =)
[11:13:09] <anonnumberanon> What browser are you using?
[11:13:56] <anonnumberanon> You know what, I sent you the wrong fucking video.
[11:14:00] <anonnumberanon> UGH...
[11:14:34] <anonnumberanon> This is the robot:
https://www.youtube.com/embed/JQdXDg9PtzY
[11:22:05] <theBear> ffox, but, well, my computers and their level of workiness is complex :)
[11:23:13] <anonnumberanon> Oh i understand why you said the thing as buggy it is an effect in put in the video hahaha.
[11:23:28] <anonnumberanon> I thought it looked tight.
[11:23:43] <anonnumberanon> I don't care what casual viewers think :)
[11:24:13] <theBear> i didn't say it was bad, just checking if my pc is worse than i thought right now, also it did something not completely unlike edge detection when a player screwed up a few days ago
[11:24:42] <theBear> that is kinda epic, and i bet the arms weigh under 5kg :)
[11:25:17] <anonnumberanon> Yeah I'm not saying that, just saying that my mom for example can't watch more than 5 seconds of it.
[11:25:28] <anonnumberanon> Ah if only my dad was alive...
[11:25:58] <theBear> and nice faders... i thought i was the only one that had used a bank of them with an avr :)
[11:26:10] <anonnumberanon> =)
[11:26:46] <anonnumberanon> You can notice i burned the LED on the first one when i was learning to wire them.
[11:26:48] <anonnumberanon> haha
[11:27:18] <theBear> heh, modern tech is funny.. you can be capable of all taht fancy robotic stuff, and not know how to wire up a simple led :)
[11:27:43] <anonnumberanon> shut up! heh
[11:27:48] <theBear> pretty wafeforms too, nice use of a multichannel scope
[11:27:55] <anonnumberanon> no the thing is that pot had 5 hookups
[11:27:56] <theBear> wasn't about y ou, just an idle observation
[11:28:04] <anonnumberanon> it was genuinely weird to wire up
[11:29:09] <anonnumberanon> When you're debugging 10-12 PWMs, it's nice to have at least 4 channels.
[11:29:09] <z64555> 5 hookups...?
[11:29:17] <theBear> as in 5 pin pot ?
[11:29:23] <anonnumberanon> 5 ports or whatever
[11:29:38] <anonnumberanon> the datasheet was horrible
[11:29:48] <z64555> yes, I understood that part, but this is the first time I've ever heard of a pot that had that many
[11:29:57] <theBear> was it a "special" one, like dual or with loudness tap or something ?
[11:30:00] <z64555> I usually see just the 3
[11:30:17] <theBear> or not a pot but a digital knob perhaps, grey code or something
[11:30:21] <anonnumberanon> well because it has the LED, it has more, and i think one was unused as well, like a dummy leg, basically from the manufacturing of it
[11:30:29] <theBear> oh, led of course
[11:31:08] <z64555> http://www.petervis.com/walkmans/sanyo-mgr-80/sanyo-mgr-80-stereo-potentiometer-repair/5-pin-potentiometer-pinout.gif
[11:31:25] <z64555> somethign like that?
[11:31:38] <anonnumberanon> mine had 1 wiper
[11:31:40] <anonnumberanon> not 2
[11:31:46] <z64555> wierd.
[11:31:51] <anonnumberanon> digikey.com
[11:33:30] <theBear> mmm that one pictured is a stereo/dual pot, a true dual will have 6 pins, but those were kinda custom designed to fit in walkmans or similar things, thus a common (gnd in circuit) pin is fine
[11:34:25] <theBear> as i recall they were little compact tiny things, basically a round "flat" mounted knob with pins sticking out underneath, then they just expose the edge thru a slot in the casing
[11:35:40] <anonnumberanon> Okay the thing had 6 legs:
[11:35:41] <anonnumberanon> https://www.digikey.com/product-detail/en/PS45L-R02BR10KN/987-1403-ND/2620672
[11:36:34] <theBear> heh relax, i know it's emotional posting a vid of yerself, but we ain't givin' yer shit
[11:37:18] <anonnumberanon> Okay now please like my vid on Youtube with your 150 dummy accounts hehehe
[11:38:19] <theBear> oh fader, damn i'm not veyr "eye on the ball" tonight... aside from the led, those alps style mini fader/casings traditionally got a handful of different leg count/layouts, and they just get used as needed, tho there are some hints, like usually a pair to one side/edge will be wiper + track-end, and the other end of the track will line up at the far end of the fader
[11:38:56] <theBear> sorry, since the account merger thing i don't got access to a single tube account, and i ain't really into making one... it's too close to accidentally signing for google+ and officically becoming a member of a social network
[11:39:02] <z64555> Anybody seen NASA's 10-engine tilt rotor?
[11:40:19] <z64555> Now that is something that I want to build
[11:44:10] <mun> does anyone know if there's any small off-the-shelf telescopic shaft that can bear around 0.2N/m torque?
[11:44:17] <mun> something < 8cm long
[11:55:49] <theBear> i ain't got any shaft smaller than that <grin>
[12:08:55] <anonnumberanon> what happened i missed 20 minutes
[12:09:13] <anonnumberanon> gues that's about enough for some shaft action though
[12:53:15] <rue_house> I had a 75Ah UPS battery just drop dead last night
[13:09:14] <nos> \o/
[13:24:25] <rue_house> like, fine, fine, fine, fine, 0V
[13:57:55] <nos> https://www.youtube.com/watch?v=73KCuNqZYHk
[13:58:12] <nos> Hot Stamping
[14:49:49] <akem> hey
[14:52:59] <z64555> helloooo
[14:57:37] <akem> not enough psycho robots.
[15:00:13] <akem> i should work on an animatronic Christ for next gen Christians' houses of god, or maybe just an augmented reality app.
[15:00:17] <akem> oops
[15:05:01] <z64555> it doesn't work that way
[15:05:13] <anonnumberanon> sup akem, check the robot i made with the servos you was looking at:
https://www.youtube.com/embed/JQdXDg9PtzY
[15:06:56] <veverak> anonnumberanon: nice analog sliders with leds
[15:07:41] <anonnumberanon> cheap too
[15:09:21] <veverak> damn
[15:09:32] * veverak procrastrinates a lot with Great Ball Contraption designs
[15:09:35] <veverak> *designs
[15:21:24] <nos> https://www.youtube.com/watch?v=RBP4BvW4RBs
[15:21:32] <nos> iCub
[15:25:51] <Elleo> cool, I worked with one of the v1 icubs for a bit, looks like things have come a long way since then
[15:27:07] <emeraldgreen> Still, it doesn't walk after 10 years and with who knows how tens of millions euro of funding...
[15:27:16] <emeraldgreen> that's academic researchers for you :)
[15:27:31] <anonnumberanon> it does:
https://www.youtube.com/watch?v=fsgEUI1w4fI
[15:27:41] <anonnumberanon> just not impressive at all and no dynamic gait
[15:27:52] <emeraldgreen> wow
[15:27:55] <emeraldgreen> finally
[15:28:11] <anonnumberanon> Nao would take a shit on iCub, while walking fast around it =)
[15:30:47] <anonnumberanon> https://www.youtube.com/watch?v=nqt3Sp3P7lo
[15:31:39] <emeraldgreen> cool
[15:32:24] <emeraldgreen> why is it possible only with a second battery tho, lipo have a very good power density
[15:34:28] <emeraldgreen> I like this one
https://youtu.be/RC7ZNXclWWY?t=71
[15:35:22] <anonnumberanon> Two batteries can do more work than one.
[15:35:34] <anonnumberanon> The servos probably switch to higher voltage.
[15:36:12] <emeraldgreen> makes sense if nao doesn't have DC-DC
[15:36:24] <veverak> https://www.youtube.com/watch?v=J4PM_Wn4j-I
[15:36:26] <veverak> awesome!
[15:36:36] <veverak> also, studing on university is always fun
[15:36:42] <veverak> many youtube hous stacked
[15:36:45] <veverak> *hours
[15:51:10] <nos> Lithium ion batteries don't sag their voltage with increased load, unlike most other batteries... Should be no reason to add a Li-based battery if you want to draw more power.
[15:51:57] <nos> Maybe the extra weight keeps it from falling over.
[16:52:30] <deshipu> you can actually damage a lithium battery by drawing too much current
[16:52:37] <deshipu> including a fire, in extreme cases
[17:03:58] <DagoRed> To can usually purchase batteries for hire output too. That is what the C rating for hobbyist batteries denote.
[17:04:39] <DagoRed> Lipos have the highest outputs and best energy density while also the most dangerous.
[17:06:48] <deshipu> I wish it was easier to find charging modules for lifepo4s
[17:06:51] <deshipu> they are a bit safer
[17:06:59] <deshipu> and don't self-discharge as much
[17:11:04] <robotustra> https://www.indiegogo.com/projects/diy-household-robot-assistant/x/13314999#/
[17:13:15] <deshipu> robotustra: they stole your robot!
[17:13:21] <veverak> damn
[17:13:25] <veverak> project name is hard to figure out truly
[17:13:28] <robotustra> :)
[17:13:52] <robotustra> it's me actually
[17:14:09] <deshipu> veverak: I usually just choose Czech names
[17:14:16] <deshipu> veverak: because they sound so funny
[17:14:28] <veverak> ...
[17:14:31] <veverak> :P :)
[17:14:38] <deshipu> I have Kubik and Katka
[17:14:44] <veverak> yeah
[17:14:53] * veverak doesn't really like czech names so much :D (usually)
[17:14:59] <deshipu> call it Jarda
[17:15:10] <veverak> that sounds horrible for me
[17:15:13] <veverak> :)
[17:15:23] <veverak> I've got "Leverak" somewhere used
[17:15:28] <deshipu> maybe you could use polish name
[17:15:32] <deshipu> like Szczepan
[17:15:36] <veverak> "veverak" = squirrel in czech
[17:16:10] <veverak> "leverak" -> is based on that, but it also sounds like "levy" which means that you are ..
[17:16:29] <veverak> clumsy a lot?
[17:16:31] <veverak> :)
[17:24:29] <deshipu> wilkołak mean werewolf in polish
[17:24:43] <veverak> :D
[17:24:48] <veverak> ok, it needs to be short and catchy
[17:24:49] <deshipu> I guess wiewiórak would mean weresquirrel
[17:25:14] <veverak> :D
[17:25:17] <veverak> sounds funny
[17:25:34] <deshipu> wiewiórka is squirrel
[17:25:49] <deshipu> wiewiór would be a very large male squirrel
[17:26:42] <veverak> :D
[17:26:51] <veverak> schpin
[17:26:54] <veverak> sounds nice
[17:27:20] <veverak> (yiddish for spider)
[17:27:35] <deshipu> spindle
[17:32:09] <veverak> yeah
[17:32:14] <veverak> Schpin will be workname at least
[17:33:31] <deshipu> sounds a little like szpon
[17:33:41] <deshipu> which means "claw"
[17:43:07] <veverak> :D
[17:43:24] <veverak> also close to chopin with proper pronanciation
[19:47:36] <veverak> hmm
[19:47:42] <veverak> how is one supposed to debug state machine?
[19:48:00] <veverak> I mean, I've got code that got several input callbacks (two) AND timer callback
[19:48:03] <veverak> and setup state
[19:48:12] * veverak wonders what is proper way to make sure it's bugless
[19:48:15] <veverak> :)
[20:03:33] <z64555> You'd need a way to affect the variables that are used to switch between states, a way to manually set the state, and a breakpoint or something to report the current state
[20:04:07] <z64555> idea is to ensure that the paths between each state are working as they should
[20:14:26] <veverak> hmm
[20:14:40] <veverak> actually I am not sure its' proper to call it state machine
[20:14:43] <veverak> nah
[20:14:47] <veverak> it's 2:49 AM for me
[20:14:49] <veverak> this needs sleep
[20:14:51] <veverak> ;)
