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[00:11:36] <theBear> hmmm.... i always found it was easier to enjoy chemicals like that without a respirator getting in the way, except the ones that do stuff like causticking yer lungs to am ushy mess of not lungs real quick, cos ya know, there ain't no enjoying those, not from a personal/human kinda perspective directly
[01:04:54] <rue_bed> the STM arms arrived today
[01:05:15] <orlock> STM?
[01:05:20] <rue_bed> there are two packages at the post office, hopefully one of them is the programmer
[01:05:24] <orlock> Scanning Tunneling Microscope?
[01:05:31] <rue_bed> STM32F----
[01:05:44] <rue_bed> less than $2 ea
[01:05:47] <rue_bed> 75Mhz
[01:05:55] <rue_bed> I'll get more if it works out
[01:06:29] <rue_bed> I'll need something to use when microchip discontinues the avrs
[01:06:44] <rue_bed> and in 8 years EVERYTHING will use arms
[01:08:34] <rue_bed> hmmm
[01:08:52] <rue_bed> I wonder if the crossover noise in dram can be used to perform logic ops
[01:09:08] <rue_bed> that might make an interesting evolved processor
[01:16:13] <Triffid_Hunter> rue_bed: see "rowhammer", it can potentially be used for privelege escalation exploits
[01:33:55] <z64555> s/arms/legs
[02:27:23] <rue_bed> I'm interested in what evolved software could do with it logically
[02:54:59] <Jak_o_Shadows> 10 through hole small toggle switches just arrived
[02:55:04] <Jak_o_Shadows> I cannot remember buying them
[03:06:12] <deshipu> Jak_o_Shadows: sometimes they send you the wrong thing
[03:06:36] <deshipu> Jak_o_Shadows: you pay for a microcontroller and you get a LED
[03:15:33] <Jak_o_Shadows> If it is, I am going to be very annoyed.
[03:15:49] <Jak_o_Shadows> If it's the thing I need soon anyway
[03:17:26] <Jak_o_Shadows> There's only 3 things it could be, and out of them, 1 is kinda urgent
[03:39:28] <deshipu> check the sender?
[03:41:45] <Jak_o_Shadows> can't see any details. Oh, wait, "frankie"
[04:25:05] <deshipu> frankie & johnny?
[04:52:34] <Jak_o_Shadows> haha
[09:28:47] <rue_house> where did you buy it from?
[09:31:44] <MrOwl> could someone point me to a good resource for slightly larger hardware at all? ideally 1.5kw 12/24v DC motors
[09:32:11] <rue_house> motors are hard cause they are so expensive to ship
[09:32:27] <rue_house> the odds are that the closer a supplier you find, the cheaper they will be
[09:32:51] <MrOwl> I see
[09:35:06] <rue_house> I wonder if there is a way to trick a max232 into generating more than 10V
[09:37:03] <rue_house> I think id be ok to use a max232 to drive a AOP605
[09:37:05] <rue_house> or two
[09:38:19] <rue_house> why cant anyone make an H bridge with a descent drive capability?
[09:39:08] <rue_house> should be able to put a 6A H bridge into a 8 pin dip with logic level conversion
[09:39:37] <rue_house> but no, everyone uses bipolar and has 1 - 2V drop on top and bottom of the bridge
[09:44:15] <rue_house> I have to use fets, and free wheeling diodes, and fet drivers, and a logic gate, arg
[10:20:22] <Snert_> you can't supersize the devices with comparable of a higher wattage case size?
[10:21:22] <Snert_> guess it's not if it's dip. There might be a 1up though.
[10:49:20] <SpeedEvil> MrOwl: depends if you're willing to do some work
[10:49:28] <MrOwl> SpeedEvil: always
[10:50:13] <SpeedEvil> http://www.hobbyking.com/hobbyking/store/__56935__Turnigy_9014_105kv_Brushless_Multi_Rotor_Motor_BLDC_.html - for example. This is a 2.6kW 500g (counting a fan) 2400RPM 24V motor
[10:50:17] <SpeedEvil> (requires ESC)
[19:20:33] <rue_house> Snert, there just are none
[19:21:15] <Snert> Add dip heatsinks ? I always like my chips running cool. Well, cooler.
[19:22:21] <Snert> I'm gonna check AOE and see if they have a complete Hbridge circuit that I can upsize the mosfets on.
[19:23:53] <rue_house> small 1A motor drivers with low votlage drops just do not exist
[19:24:10] <Snert> gotta be careful about shoot throu I know but seems like a better choice.
[19:30:23] <rue_house> there are none, no small ones
[21:14:31] <Snert_> hmmm. wonder if that's a $ opportunity.
[21:14:46] <Snert_> prolly not since china would knock it off in a heartbeat.
[23:24:04] <anniepoo> rue, none probably exist because of the physics of the motors. Motor drop is due to two sources, ohmic loss and back emf
[23:25:29] <anniepoo> back emf is proportional to speed, among other things, so if you clamp the shaft of a motor it looks like a resistor, one whose resistance is just that of the length of wire in the rotor (permag motor0
[23:30:30] <orlock> anniepoo: You are an EE?
[23:30:51] <anniepoo> I have 980% of a physics degree
[23:30:57] <anniepoo> I have 90% of a physics degree
[23:31:04] <anniepoo> 8cD and an inability to type
[23:31:13] <orlock> Cool, still studying?
[23:31:19] <anniepoo> no
[23:31:28] <orlock> got distracted by the real world then?
[23:31:43] <anniepoo> I've been a working engineer since the mid 80's
[23:31:54] <orlock> Awesome
[23:31:57] <anniepoo> I'm not sure what to call myself any more
[23:32:21] <anniepoo> I am working part time as a logic programmer
[23:32:51] <orlock> Say, do you know what the standard rule of thumb loss is for brushed perm. magnet electric motors?
[23:32:59] <anniepoo> I am partners in an engineering facility. We operate industrial lasers, CNC machine tools, and other fun stuff
[23:33:12] <anniepoo> I spent today struggling with a powder coating job we're doing
[23:33:25] <orlock> Ahh, my employer has a similar facility
[23:33:45] <orlock> but we havea cube farm of engineers doing the designs
[23:33:51] <anniepoo> and right now I'm watching a video on making puppets, part of planning to make a social robot
[23:34:17] <anniepoo> We have a couple engineers who just refused to succumb
[23:34:38] <anniepoo> http://theelginworks.com/
[23:35:39] <anniepoo> To the capabilities list should now be added sheet metal work and chemical coatins
[23:35:44] <anniepoo> To the capabilities list should now be added sheet metal work and chemical coatings
[23:36:04] <orlock> anniepoo: We design and manufacture medical robots
[23:36:26] <anniepoo> Oooh, the kind that run around the hospital or the surgical kind?
[23:36:29] <orlock> anniepoo: We did do a whole pile of other stuff, but there was a corporate split just under a month ago
[23:36:45] <orlock> Pathology lab gear , here specifically
[23:36:53] <anniepoo> I used to work for a social robotics company.
[23:37:10] <orlock> so tissue encapsulation and staining
[23:37:17] <anniepoo> Ooh, so the 'put a bit of something in each of a zillion eppinger flasks' type
[23:37:23] <orlock> AHh - The closest we get is a yearly sumo bot compitition
[23:37:56] <orlock> anniepoo: More working with tissue samples - getting it onto slides, and making them more visible.
[23:37:58] <anniepoo> http://www.robokindrobots.com/ <-- worked for these guys
[23:38:16] <orlock> anniepoo: The other "half " specialised in that sort of thing, but they are now part of another company
[23:38:28] <orlock> anniepoo: Along with Fluke and Tek
[23:38:40] <orlock> they just got new owners too
[23:38:54] <anniepoo> I once did a software contract for such a situation that was fun. I built a tool to make thousands of images of cell cultures fly around in 3D space
[23:39:15] <anniepoo> in a virtual world, so the researcher could interactively sort them and graph them in various ways
[23:39:17] <orlock> anniepoo: They made something like that too.. except real, not simulated
[23:39:36] <orlock> bio tissue 3d printer
[23:39:38] <anniepoo> something like what?
[23:39:49] <anniepoo> wait, they were printing boys?
[23:39:58] <anniepoo> =8cO the ethical issues abound
[23:40:11] <orlock> no, cell cultures
[23:40:25] <anniepoo> Oh!
[23:40:29] <anniepoo> much better
[23:40:44] <orlock> Hmm - my daughter has ASD. I'm not sure how she'd go with a roboy playpal
[23:41:20] <orlock> She actually has no problems making friends at all, which is awesome. I fear she'd rather take the robot apart though
[23:41:50] <anniepoo> the problem with the usual robot used like this is cost. The robot's expensive and breakable
[23:41:55] <anniepoo> I'm working around that.
[23:43:35] <anniepoo> let me ask you -
[23:43:53] <anniepoo> would it be an advantage to make the robot capable of coming apart?
[23:44:34] <orlock> i think it might depend on the person, and how its engineered
[23:44:42] <orlock> Did you ever use a mid-90's Toshiba laptop?
[23:44:45] <anniepoo> if it could come apart nondestructively, (I have NO idea how that'd work)
[23:44:48] <orlock> with the trackball?
[23:44:50] <anniepoo> no, never did
[23:44:52] <Triffid_Hunter> robosapien are apparently pretty nice inside, everything colour coded and labelled and suchforth
[23:45:15] <Triffid_Hunter> those things are cheap as chips these days, and a joy for folks who prefer a teardown to 'normal' interaction
[23:45:27] <orlock> It clipped onto the side, firm enough for use, but using a pair of rubberised prombs instead of hard/brittle
[23:45:35] <orlock> so if there was a knock, it would just fall off
[23:45:41] <anniepoo> ah
[23:46:16] <anniepoo> I see
[23:46:54] <anniepoo> I've developed a soft material that makes the robot impact resistant
[23:47:07] <orlock> Milo reminds me of the slightly creepy puppets in Lazytown
[23:47:25] <anniepoo> the attack dolls in Barbarella
[23:47:43] <anniepoo> Hmm...
[23:48:57] <anniepoo> orlock, so your daughter would rather disassemble and reassemble the robot?
[23:49:11] <anniepoo> Or shoulld I think more destructive?
[23:49:13] <anniepoo> Or?
[23:49:34] <orlock> More creative rather than distructive
[23:50:09] <anniepoo> sadly, Robokind didn't have it's act together - corporate dysfunction. I eventually left
[23:50:24] <anniepoo> Hmm...
[23:50:24] <orlock> if something looks like it might or should come apart, she'll try, but usually not breaking things
[23:51:08] <anniepoo> Sure - and many of us were the kid who took the family alarm clock apart
[23:51:58] <orlock> Yeah
[23:52:04] <anniepoo> the best present my father ever gave me was the old hydraulic control unit removed from the automatic transmission of the family car. I spent Sooo many hours taking that thing apart
[23:54:03] <anniepoo> what I really want to make is a robot that's indestructable, won't endanger the children (one parent gave me the design advice 'first consider every toy as a weapon')
[23:54:18] <orlock> that's very good advice
[23:54:31] <orlock> even hard eyes on a plush toy can hurt if thrown accuratly enough
[23:54:37] <anniepoo> yes
[23:55:09] <anniepoo> so, I want them cheap enough that every child can have one
[23:55:31] <anniepoo> I've been working with elementary teachers to figure out how to use them in the classroom
[23:57:06] <anniepoo> this conversation's making me think about what sort of robot I would have enjoyed - and while I've considered disconnectable sockets just as overstress fusing, (the arm doesn't breeak, it just pulls off), you've made me see other uses
[23:57:24] <anniepoo> the robots will be 'naked' (think muppets) and come with a stack of clothes
[23:58:52] <anniepoo> outside covering will be replaceable (and identical, so we can renew Susy's robot after she spray paints it)