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[00:08:30] <rue_shop3> ok, lets see
[00:08:38] <rue_shop3> power supply or the pipe bender for the 12' mecha
[00:09:55] <rue_shop3> oooh they cheated oh his supply
[00:10:08] <rue_shop3> its "36V, 5A" but not at the same time, its limited to 80w
[00:10:26] <rue_shop3> my 2 channel 30V, 5A, can output a full 300W
[01:56:00] <rue_shop3> would all the arguing parties in my head PLEASE SHUT UP
[01:56:02] <rue_shop3> cant think..
[01:56:18] <rue_shop3> should I use the fet or the bipolar...
[01:56:37] <rue_shop3> the bipolar may not work and will dissipate 8.75w
[01:56:43] <rue_shop3> best case
[01:57:09] <rue_shop3> and we dont have much data on the fet circuit, but we know it switches ok
[01:57:14] <rue_shop3> at 50%
[01:57:26] <rue_shop3> maybe trying it at different duties is a good idea
[02:09:44] <rue_shop3> aha, if the bucking regulator inductor rings, put a snubber across it
[02:20:54] <Jak_o_Shadows> ah, the shed is getting there
[02:21:19] <Jak_o_Shadows> pegboard is hung on rails, working on other things to hang off the rails
[02:23:03] <rue_shop3> cool
[02:23:15] <rue_shop3> the transistors drawr set is 5x5
[02:23:24] <rue_shop3> I need to divvy it up by voltage and current
[02:23:42] <rue_shop3> and have room for pnp/npn / Pch/Nch
[02:23:54] <rue_shop3> each drawr only divides into 3 spaces
[02:24:03] <rue_shop3> so
[02:24:08] <rue_shop3> I have 5x5x3
[02:24:19] <Jak_o_Shadows> So not looking forward to lowering the workbench
[02:24:32] <rue_shop3> I have transistors from 10ma to 60A
[02:24:44] <rue_shop3> from 30V to 1200V
[02:25:24] <rue_shop3> its just transistors, no triacs or scrs
[02:26:13] <rue_shop3> NPN | PNP | Pch | Nch | other
[02:26:30] <rue_shop3> <1A
[02:26:31] <rue_shop3> --
[02:26:38] <rue_shop3> <3A
[02:26:40] <rue_shop3> --
[02:26:48] <rue_shop3> < 10A
[02:26:50] <rue_shop3> --
[02:27:02] <rue_shop3> <40A
[02:27:04] <rue_shop3> --
[02:27:12] <rue_shop3> 40A+
[02:27:26] <rue_shop3> and do votlage going back
[02:27:59] <rue_shop3> depths would be <30V | 30-60V | <60V
[02:28:04] <rue_shop3> ?
[02:28:27] <rue_shop3> >60V :)
[02:29:43] <rue_shop3> then when i'm looking for one, I'm immediatly down to a column,
[02:29:53] <rue_shop3> a few rows, depending
[02:30:00] <rue_shop3> a few depths
[02:30:22] <rue_shop3> and then its just gain, which I can sort out by whats in that part of the corresponding drawr
[02:30:45] <rue_shop3> maybe 2 rows for NPN
[02:30:49] <rue_shop3> er, columns
[02:44:42] <rue_shop3> 1k 20V
[02:45:02] <rue_shop3> ohm -v 20 -r 1000
[02:45:02] <rue_shop3> Wattage is: 0.400000
[02:45:02] <rue_shop3> Current is: 0.020000
[02:45:02] <rue_shop3> Voltage is: 20.000000
[02:45:02] <rue_shop3> Resistance is : 1000.000000
[02:45:06] <rue_shop3> hmm
[02:45:19] <rue_shop3> 1/4w resistor wont do
[02:45:46] <rue_shop3> no, no, thats not right
[02:45:50] <rue_shop3> there are two
[02:46:00] <rue_shop3> ohm -v 20 -r 2000
[02:46:00] <rue_shop3> Wattage is: 0.200000
[02:46:01] <rue_shop3> Current is: 0.010000
[02:46:01] <rue_shop3> Voltage is: 20.000000
[02:46:01] <rue_shop3> Resistance is : 2000.000000
[02:46:12] <rue_shop3> still high for a 1/4w resistor
[02:46:44] <rue_shop3> right now I'm at 20V using 2k
[02:47:04] <rue_shop3> oh thats my target for this one anyhow
[03:40:32] <rue_shop3> turned the shop upside down and shook it, good, no 1k over 1/4w
[03:40:42] <rue_shop3> so, I'm guessing 2x 2k in parallel
[04:08:15] <theBear> wow, you been goin' to gym a bit since the last picture i saw eh ? impressive... ("She was a shoplifter when I knew 'er" "mmmpf... she doesn't look strong enough" "WHAT ?" "to lift shops" <grin>)
[04:34:07] <rue_shop3> :)
[04:34:42] <rue_shop3> well, there is a slight turn off delay in the fet driver that causes both fets of the pushpull to hit heads when going to 100% duty
[04:34:52] <rue_shop3> not sure how I should limit that one
[05:15:25] <theBear> me neither, but i suspect it's gonna be not-cool-dude if you don't
[05:26:46] <rue_shop3> I tried to use the input filter choke as a current sense, but I only get about 20mv on it
[05:28:35] <rue_shop3> bedtime, I'm getting tippy
[06:34:18] <vicarion> dammit, she looks so sad in that picture i just want to give her a hug:
http://www.foxnews.com/photoessay/sites/foxnews.com.photoessay/files/styles/large/public/photoessay/photoessay_5949_images/1211081240_M_121108_aiko8.jpg
[06:35:25] <theBear> she looks like a realdoll
[06:38:28] <Snert> is that a fucktoy?
[06:38:41] <vicarion> maybe they all look alike because of the silicone skin?
[06:39:15] <vicarion> naw, it's a robot:
http://www.projectaiko.com/
[06:42:01] <theBear> oh, i didn't mean a robot
[06:42:08] <theBear> the original "realistic sex doll" ones
[06:42:34] <theBear> robots are more animated and got more facial expression than that girl
[07:55:36] <jhylands> Aiko is made by a guy in Toronto - he used to come to our meetings in Brampton
[09:22:53] <theBear> gas station in brampton ? i've never been to brampton ('HE HAS NEVER BEEN THERE !' 'he's never been there !')
[09:23:05] <theBear> what ? hypnogerms ? you're crazy man
[09:23:32] <jhylands> huh?
[09:26:33] <theBear> don't mind me... i'm wrong in the head, certain things give me, for want of a better term, flashbacks.... reflection on the past, that may even be THE term, medically or technically or something
[09:26:37] <theBear> :)
[09:26:43] <jhylands> cool
[09:27:03] <theBear> yeah, i know, but thanks anyway, compliments are always welcome
[11:03:25] <akem> hey
[11:03:48] <akem> i was looking a raspberry boot time since there is a Linux OS
[11:05:01] <akem> maybe not so fast, but there must be 'hot' boot support, like getting out of hibernation mode swapping the memory back from SD, instant boot up
[11:05:58] <akem> my HJ servo fried out on 5 or 6 V today unbelievable but the truth Mr Fux.
[11:06:51] <akem> with an interesting smoke effect, one transistor inside, so i turned it back to regular DC motor but all gears are metal
[11:07:00] <akem> unlike MG
[11:07:10] <akem> anyway.
[11:07:37] <akem> enjoy @ my no life dot no fun
[11:29:20] <deshipu> maybe you connected it backwards?
[11:33:04] <akem> yea, but it shouldn't with low voltage like this
[11:33:38] <akem> what do you use to reverse DC output polarity?
[11:35:08] <akem> example on a small normal DC motor you change polarity and it will turn the other way around
[11:35:08] <akem> separate power supply
[11:37:52] <deshipu> voltage is irrelevant, as long as there is enough current
[11:38:14] <deshipu> to reverse polarity on a motor you use a H-bridge
[11:38:30] <deshipu> there are ready chips that have a double h-bridge in them
[11:38:57] <deshipu> alls the "motor boards" use them
[11:39:25] <akem> yea right just like bipolar driver boards, gotta get some
[11:40:04] <deshipu> the servo has an h-bridge inside it already
[11:40:29] <akem> ok, i was thinking of a passive component way of doing that, not with ICs.
[11:41:30] <akem> don't know why it is called an H-bridge, but they are cheap.
[11:43:27] <akem2> deshipu what servos are they the spider/quadruped ones? MG?
[11:43:36] <deshipu> akem2: you mean Tote?
[11:43:45] <deshipu> akem2: it uses the cheapest shit there is, sg90s
[11:44:07] <deshipu> akem2: they suck, but it's the cheapest you can get
[11:44:33] <deshipu> I have one version using sg92r, and they are much better
[11:44:39] <deshipu> but twice as expensive
[11:44:49] <deshipu> I think mgs would be too heavy
[11:44:52] <akem2> SG ? just like the stargate right, i got some MG90s, they look like the same
[11:45:36] <deshipu> yeah, the only difference between sg and mg (apart from who cloned them) is that mg have metal gears, and sg have nylon gears
[11:46:14] <deshipu> well, mgs may have stronger motor too, no idea
[11:46:30] <akem2> ok i got SG90s also, just double checked...same but different color
[11:47:32] <akem2> on the MG the 1st gear attached to the motor axis is plastic/nylon, so not full metal which is bad
[11:47:51] <deshipu> I think it varies depending on who actually produced them
[11:48:05] <deshipu> they all say "towerppro", but most of them are clones
[11:48:10] <akem2> if it force a little the teeth on the 1st gear gets bitten off...
[11:48:11] <akem2> yes also
[11:48:22] <deshipu> sg92r have carbon fiber gears
[11:48:29] <akem2> we can't really tell
[11:51:03] <akem2> with the HJ i have nice metal grip/attach to the back of the motor body
[11:51:40] <deshipu> cool, I always find mounting the hobby servos awkward
[11:51:49] <deshipu> they really weren't designed for robots
[11:52:35] <akem2> http://ecx.images-amazon.com/images/I/61N%2B3mUd1CL._SL1000_.jpg
[11:54:01] <akem2> deshipu what other servo types you use?
[13:11:40] <akem> sardines box just for my lovely person.
[13:17:33] <akem> none of your business i know
[13:17:55] <akem> deshipu you got a 3D printer?
[13:18:13] <deshipu> sorry, airport wifi is patchy
[13:18:28] <deshipu> no, I don't
[13:19:13] <deshipu> I could have access to one but never needed it
[13:19:42] <akem> ok
[13:20:46] <deshipu> I want to build my robot without one, so that they can be easily replicated by other people
[13:21:54] <akem> i was interested here but now i m more interested in a stepper based robot arm with the extruder attached to it.
[13:22:23] <deshipu> that won't be very precise
[13:22:43] <akem> i see, but not only for robot, general purpose 3D printing
[13:23:24] <akem> not sure
[13:23:39] <deshipu> gotta run for the plane
[13:24:21] <akem> i have a kitchen blender for crunching vegetables or fruit
[13:24:37] <akem> ok, enjoy your flight bye
[13:25:13] <jhylands> akem - I use 3D printing a lot with my robotics
[13:25:54] <akem> and its very handy,, i could do that easly with a 3D printer
[13:26:29] <akem> jhylands what 3D printer/s? mechanical parts?
[13:26:44] <jhylands> I have a Mojo, which prints only ABS
[13:27:06] <jhylands> but I'm getting a Raise3D N1, which is way cheaper and can print a wide variety of materials
[13:27:49] <jhylands> what do you mean by mechanical parts?
[13:27:50] <akem> jhylands don't know this one, you do things like inmoov robot?
[13:28:21] <jhylands> well, I don't do humanoids, but I have a quad walker
[13:28:29] <jhylands> https://www.youtube.com/watch?v=1q4nsocmLWU
[13:28:30] <akem> gears, motors attach/clips/slots
[13:28:41] <jhylands> yeah, definitely
[13:28:48] <jhylands> ABS is awesome for that sort of thing
[13:30:07] <jhylands> here's a picture of another robot I built
[13:30:07] <jhylands> http://1.bp.blogspot.com/-dSrmNR0NCOs/UrH-PrvsP4I/AAAAAAAACaA/fBx451OXB1A/s1600/2013-12-18+14.50.38.jpg
[13:30:23] <jhylands> the black tracks are lego, but everything ivory-colored is 3D printed
[13:33:04] <jhylands> This one is black ABS:
https://app.box.com/s/vbj5vmr67pw32jbk8j33sjgbkfelrqyg
[13:33:31] <jhylands> I drill and tap holes for machine screws
[13:33:32] <akem> nice
[13:37:40] <akem> big 3d printer and the raise3d one i did not know also, what 3D software you use?
[13:38:43] <akem> you re also a micro python guy i see
[13:39:26] <jhylands> yeah
[13:39:40] <jhylands> I used to use Rhino3D for everything, but lately I've been using OnShape
[13:40:03] <jhylands> I'm in the process of putting a raspberry pi on my quad walker
[13:40:13] <jhylands> along with a couple micropython boards
[13:40:26] <jhylands> one will manage power, and one will be an espruino pico
[13:40:45] <jhylands> which will plug right into one of the pi's USB ports
[13:40:58] <akem> same here i do not know them, but i heard about, i'm using blender(not the kitchen one)
[13:41:18] <jhylands> you should try OnShape
[13:41:25] <jhylands> its free, and awesomely powerful
[13:47:17] <akem> i feel fine with blender, just that i'm waiting for the fresh android bug free version
[13:47:46] <jhylands> OnShape has a very usable Android client
[13:48:02] <vicarion> <jhylands> Aiko is made by a guy in Toronto - he used to come to our meetings in Brampton <-- jhylands do you know what happened to him?
[13:48:14] <jhylands> no, he just sort of disappeared
[13:48:30] <jhylands> I was going to do some 3D printing for him, but he stopped coming
[13:49:14] * mrdata is in toronto
[13:49:31] <jhylands> I live in London now, just a couple hours west
[13:49:49] <mrdata> what else do you know about the guy?
[13:49:56] <vicarion> yeah, i don't think he's updated his website since 2013
[13:50:01] <jhylands> he has weird friends
[13:50:03] <mrdata> he might be coming to maker spaces i go to?
[13:50:14] <vicarion> don't we all
[13:50:24] <jhylands> apparently the first thing his friends tried to do when he showed them Aiko was to feel "her" breasts
[13:50:59] <jhylands> http://www.projectaiko.com/aiko2.html
[13:51:09] <jhylands> he's the guy in the two bottom left pictures
[13:53:07] <mrdata> looks vaguely familiar
[13:53:32] <jhylands> Trung Le
[13:53:36] <jhylands> that's his name
[13:53:46] <vicarion> i was quite impressed by what he achieved, given that he's just one guy working in his garage in his spare time. it's a shame all the software and other work he did was never released
[13:53:50] <akem> ok, bye
[13:56:09] <mrdata> https://www.youtube.com/watch?v=yomx7bXMf2U
[13:58:24] <vicarion> i think that's the only robot demo video i've ever seen that involves boob grabbing
[13:58:55] <jhylands> yeah
[14:07:45] <vicarion> where do they put the speaker for these androids? if it's inside her mouth, i would have thought her lip movement would interfere with the sound
[14:08:01] <jhylands> I think its just inside the head somewhere
[14:08:08] <jhylands> the head is mostly hollow
[14:08:28] <jhylands> although they typically have servos and such
[14:09:06] <vicarion> it seems like the acoustics would be poor, unless the speaker is in contact with the air
[16:28:14] <deshipu> it doesn't matter, with this poor quality overall
[16:28:44] <jhylands> how was your flight?
[16:42:22] <deshipu> quite bad, as far as they go, luckily Brussels is close to Zürich
[16:42:35] <deshipu> we still had a 40 minutes delay and bad turbulences
[17:16:09] <ace4016> hrm, i wonder if Boston Dynamic tries to mimic feet/toes at all...
[17:18:22] <emeraldgreen> afaik Boston Dynamics approach to engineering/control is based on Raibert's work
https://mitpress.mit.edu/books/legged-robots-balance
[17:18:44] <emeraldgreen> don't know more tho because couldn't find a dl for this book
[17:19:26] <ace4016> out of print :P
[17:19:57] <ace4016> considering their designs don't have toes, i'm assuming they don't consider it
[17:20:12] <emeraldgreen> nice, its became available on l i b r a r y g e n e s i s
[17:22:25] <maiden> emeraldreen: have you seen:
https://github.com/RobotLocomotion/drake/wiki
[17:22:48] <maiden> take a look at
https://www.edx.org/course/underactuated-robotics-mitx-6-832x-0
[17:23:17] <maiden> a good online book for the course:
http://underactuated.csail.mit.edu/underactuated.html
[17:23:24] <emeraldgreen> drake looks very cool
[17:23:38] <ace4016> hrm...
[17:24:05] <emeraldgreen> these courses/books look really cool, but I'm not yet at that level
[17:24:37] <emeraldgreen> >hardcore applied math
[17:25:27] <emeraldgreen> really very cool tho, at least I can read deeper at post-ZMP walking approaches
[17:25:34] <emeraldgreen> *about
[17:26:39] <maiden> i am currently enlisted to that course, are working myself through the lecturers and got drake + matlab up and running :D
[17:26:55] <maiden> quite sweet that you get a matlab licence from a free course ;)
[17:27:00] <ace4016> i can understand the math; should start collecting the books...
[17:27:05] <maiden> and it works just fine in linux as well :D
[17:28:24] <maiden> on the subject of walking:
http://underactuated.csail.mit.edu/underactuated.html?chapter=4
[20:08:49] <rue_house> .... I just lost a piece of a tooth :(
[21:20:37] <codepython777> rue_house: hope it was a gear tooth
[23:22:24] <rue_house> no, it was one 2nd from the back...
[23:22:34] <rue_house> I think its been cracked for a while
