#robotics Logs
Dec 26 2018
#robotics Calendar
12:15 AM mrdata--: https://www.theguardian.com/technology/2018/dec/21/alexa-amazon-echo-kill-your-foster-parents
12:19 AM mrdata--: alexa attains a whole new level of creepy
01:32 AM rue_shop1: PEW! PEW! PEW PEW!!!!
01:32 AM * rue_shop1 shoots lasers at z
01:42 AM rue_shop1: ha! almost got my hand stuck in a 3d scanner!
01:46 AM rue_shop1: so, I guess a good goal is to take a jpg image, map it out, diff it against itself and make sure the result is null
01:46 AM rue_shop1: then to take and do it with two images of the same thing
01:53 AM flav0r: HEY HEY !
02:17 AM rue_mohr: I wonder if there is a way to use SDL to dump a jpg to a buffer
02:41 AM rue_mohr: ahhh I'm having a problem doing anyting
01:10 PM rue_mohr: 3d scanner: attach driver board, ok.
01:26 PM Tom_L: check.
02:47 PM veverak: so
02:47 PM veverak: bought this model of ship
02:47 PM veverak: (let's make it RC)
02:48 PM veverak: so, I looked at what lights are sold at RC shops
02:48 PM veverak: fucking motherfuckes
02:48 PM veverak: 10$ for one light 5x4mm ?
03:11 PM polprog: RC shops are mostly for people with limited electronics ability
03:12 PM veverak: yeah
03:12 PM polprog: its like, the apple of electronic shops :P
03:12 PM polprog: i went to one once, and the prices were just insane
03:12 PM veverak: yup
03:12 PM polprog: not gonna pay $200 for a receiver box with a couple H drivers for a motor.
03:21 PM veverak: exactly
03:21 PM veverak: and thanks god
03:21 PM veverak: modern receivers/transmitters moved to modern age
03:21 PM veverak: mine actually has 'serial bus' communication :)
03:22 PM veverak: so, 'arduino' it!
05:40 PM rue_mohr: I keep stock on a lot of the china stuff, leds and mtoor drivers
05:40 PM rue_mohr: peopel say "why"
05:40 PM rue_mohr: well, casue if I have it in stock, I dont have to pay 10x what its worth or wait 4 months to get it
05:41 PM rue_mohr: people also say "why build efficient code, we have processors that are really powerfull these days"
05:41 PM rue_mohr: people say "why insulate your house, just install another heater"
05:43 PM veverak: people are dumb
05:43 PM veverak: :)
05:43 PM veverak: rue_mohr: I found out
05:43 PM veverak: that there are few sellers that ... buy a tons of china stuff and sell it locally
05:43 PM veverak: and still have reasonable price
05:46 PM rue_mohr: 2x china can be reasonable for walk-in-and-buy-it
05:46 PM rue_mohr: esp with the hastle to get it sometimes
05:47 PM rue_mohr: well, where is my race with z on the 3d scanner then...
05:47 PM rue_mohr: I need to mount the driver board and program the pi
05:48 PM veverak: I wonder
05:48 PM veverak: what CPU to put into the RC Boat
05:48 PM veverak: it just should controll the lights...
05:48 PM veverak: ...and work with SBUS of receiver
05:48 PM veverak: hmm
05:49 PM Tom_L: electric rc boat?
05:49 PM veverak: yup
05:50 PM veverak: converting one to RC
05:50 PM veverak: Frsky got receivers with SBUS
05:50 PM veverak: so I will get full 16 channels with small cheap receiver :)
05:50 PM veverak: (there is a lib for stm32/arduino)
05:51 PM Tom_L: mine were gas
05:52 PM veverak: mine is small
05:52 PM veverak: https://imgur.com/a/1RFl6Mr
05:52 PM veverak: these small parts get on my nerves
05:52 PM veverak: but it's the 'right pain in the ass'
05:53 PM veverak: so
05:53 PM Tom_L: cute
05:53 PM veverak: got prepared lights (8 leds), servo for 'rotating radar' and stepper for reel
05:53 PM Tom_L: mine were fiberglass race boats
05:54 PM veverak: it's plastic kit
05:54 PM veverak: http://www.billingboats.com/da/14/2/boats/the-beginner/P-bb101-royal-navy-lifeboat.html
05:54 PM veverak: tbh I enjoy it
05:54 PM Tom_L: yeah, i did
05:55 PM veverak: hmm
05:55 PM veverak: * Teensy 3.0 || Teensy 3.1/3.2 || Teensy 3.5 || Teensy 3.6 || Teensy LC || STM32L4 || Maple Mini || Arduino Mega 2560
05:55 PM veverak: the SBUS lib supports only this HW
05:55 PM veverak: that suck
05:55 PM Tom_L: was an expensive hobby though
05:55 PM veverak: Tom_L: I hope the small shipp won't be :)
05:55 PM Tom_L: naw it shouldn't be
05:56 PM Tom_L: just make sure it's all water tight
05:57 PM veverak: yup
05:58 PM veverak: ok
05:58 PM veverak: stm32l4 it is
05:59 PM veverak: so
05:59 PM veverak: maybe arduino shield would be nice
06:00 PM veverak: nah, local store does not have it
06:00 PM veverak: I think this one http://www.mpja.com/images/33327-large.jpg
06:01 PM veverak: is perfect
06:01 PM rue_shop3: stm32F103
06:02 PM rue_shop3: use it as a project to start converting over
06:05 PM veverak: I prefer l4
06:06 PM rue_shop3: yes, you prolly want to etch your own board, etc etc etc, the 32F103 comes on "blue pill" with a bunch of support hardware
06:07 PM rue_shop3: I tend to just throw them into projects, like the pro minis
06:07 PM veverak: yeah
06:07 PM veverak: L4 too
06:07 PM veverak: :)
06:07 PM rue_shop3: ? oh
06:07 PM veverak: NUCLEO L432KC
06:07 PM veverak: and I used that board this summer at work for a few months
06:07 PM veverak: so, experience...
06:09 PM rue_shop3: https://os.mbed.com/media/uploads/bcostm/nucleo_l432kc_2017_10_09.png
06:09 PM rue_shop3: ?
06:09 PM veverak: yup
06:09 PM rue_shop3: its fun watching arduinoism trying to apply itself to all these different platforms
06:10 PM veverak: :))))
06:10 PM rue_shop3: the arduino might be 'dead' but its legacy set a new stage
06:10 PM rue_shop3: (one with lots of steps in odd places)
06:11 PM veverak: exactly
06:11 PM rue_shop3: that board sure has a lot of config jumpers...
06:11 PM rue_shop3: (the 0 ohm resistors)
06:12 PM rue_shop3: its interesting, the manufacturers comming up with arduino carriers for their chips
06:12 PM rue_shop3: their KINDA acknowledging the hobby market
06:15 PM veverak: yup
06:15 PM rue_shop3: huh its got a dac
06:16 PM rue_shop3: that could be hooked into a pwm generator and used to control a servomotor :)
06:16 PM rue_shop3: we can code a software pwm system in java, and if its not fast enough, we can get a faster processor running a realtime operating system
06:17 PM veverak: hush
06:17 PM veverak: there are things that rather not be told loudly
06:17 PM veverak: :)
06:17 PM rue_shop3: we can have a monkey code it, and then run it all thru a debugger to see why the code doesn't do what we want
06:19 PM veverak: hmm
06:20 PM veverak: do I want 1W led?
06:20 PM rue_shop3: use pmma fibers to take the light to where you want it
06:20 PM rue_shop3: smaller @ point of usage
06:20 PM veverak: !!!
06:20 PM rue_shop3: ^^ no I'm not being cynical that time
06:20 PM veverak: hmm
06:20 PM veverak: 90 degrees angle is off the limits I suppose?
06:21 PM rue_shop3: fer what?
06:21 PM veverak: the fiber
06:21 PM veverak: or
06:21 PM rue_shop3: you can put pretty sharp bends in the pmma
06:21 PM veverak: the light in it
06:21 PM veverak: hmm
06:21 PM rue_shop3: I have some 0.5mm (?) pmma I was playing with
06:22 PM rue_shop3: SOMETIMES you can find a good price on a 50pcs bushel of 1m peices
06:22 PM rue_shop3: pmma fiber is generally pretty pricey
06:22 PM rue_shop3: sometimes toslink cables aren't
06:23 PM veverak: hmmm
06:23 PM veverak: this way
06:23 PM veverak: I could have small light on top of the boat
06:23 PM veverak: that can rotate in two axis and got the power...
06:23 PM rue_shop3: mirror rotating with light under it
06:23 PM rue_shop3: or over it
06:23 PM rue_shop3: ^
06:23 PM rue_shop3: |
06:23 PM rue_shop3: er
06:24 PM rue_shop3: try that again
06:24 PM rue_shop3: /
06:24 PM rue_shop3: ^
06:24 PM rue_shop3: |
06:24 PM rue_shop3: led
06:25 PM veverak: yeah
06:25 PM veverak: hmm
06:25 PM veverak: it will be mounted on top of a tube
06:25 PM veverak: so you rotate the tube
06:26 PM rue_shop3: http://ruemohr.org/~ircjunk/robots/abspos/dscn0659.jpg
06:26 PM veverak: too big, but yeah
06:26 PM rue_shop3: yea
06:26 PM rue_shop3: you could also scratch a bundle of 8pmma fibers and put them on a ratating array of leds
06:28 PM veverak: I wonder
06:28 PM veverak: if I have two tubes
06:28 PM veverak: one inside the other
06:28 PM veverak: and let's say I am able to rotate both
06:28 PM veverak: and move the inner up/down
06:28 PM veverak: there should be a way to make 'tilt' mechanism at the end?
06:30 PM rue_shop3: armatron
06:31 PM veverak: ?
06:32 PM rue_shop3: iirc they had a concentric drive system
06:37 PM veverak: I've got an idea
06:38 PM rue_shop3: I hope you get lots more
06:42 PM veverak: WTF
06:42 PM veverak: I can make videos with my notebook?
06:48 PM veverak: rue_shop3: https://share.icloud.com/photos/0R07MdXRRnLll4HKlC1_A17dw
06:48 PM veverak: same could work with the fibers
06:48 PM veverak: the top 'holder' is on axis
06:48 PM veverak: movement of the inner tube should rotate the axis
06:49 PM veverak: so, two axis gimbal for light that is hidden inside the ship
06:49 PM veverak: I suppose two sg90 could control it just fine
06:49 PM veverak: :)
06:51 PM veverak: ordered
06:51 PM veverak: also ordered attiny65
06:52 PM veverak: I suppose I can use pca9685 with attin65 to controll the thing from laptop directly
06:52 PM veverak: (attiny65 can be usde to make /dev/i2c-x)
06:52 PM flav0r: looks like a trash can
06:53 PM veverak: rue_shop3: but, having the main light on two axis gimbail seems like overkill
07:01 PM rue_shop3: dont 100% get what your up to
07:02 PM veverak: me neither
07:02 PM veverak: gn :)
07:14 PM Tom_L: meh, i gave up wondering what you're up to
07:17 PM rue_shop3: so, the idea is to become a mechanical lifeform
07:17 PM rue_shop3: definitions aside
07:17 PM rue_shop3: to win, I need to make exponential progress
07:17 PM rue_shop3: how do I do it, I think some time spent on prioritization is important
07:22 PM rue_shop1: you cant do it on your own
07:22 PM rue_shop3: do it or figure it out
07:23 PM rue_shop1: figure it out
07:23 PM rue_shop3: right, we can only fiure it out for someone else
07:23 PM rue_shop1: so it seems a good time to pull a card out of ones sleeve
07:24 PM rue_shop3: I do love technicallities }:]
07:25 PM Tom_L: so will we find you one day 12" from a charge station holding the plug in your hand?
07:25 PM rue_shop3: na, the first trick is to replicate a few times
07:25 PM rue_shop1: once digital, copies apply
07:26 PM rue_shop1: so I solved the blur problem on the scope
07:26 PM rue_shop1: took off the screen protector thats been on there for ~20 years
07:26 PM Tom_L: that was it?
07:29 PM rue_shop1: yea, just happened to notice the traces off the edge of the protector were really sharp
07:29 PM Tom_L: haven't had my scope out in ages
07:29 PM rue_shop1: ok rue, lets see
07:30 PM rue_shop1: so far we have said that you should build some prosthetics and get used to them
07:31 PM rue_shop1: I think the main focus should be your exhaustion issue
07:32 PM rue_shop1: dont worry about becomming a machine, get used to being one first
07:32 PM rue_shop1: its not a chicken and egg problem
07:33 PM rue_shop1: need to find a way to zerp knowing too much showing your donw
07:34 PM rue_shop1: slowing you down
07:34 PM rue_shop1: but there needs to be a focus on what you need to get from here to there
07:34 PM rue_shop1: knowing what its like existing as a machine is just a thread
07:35 PM rue_shop1: you need to be apt at designing and ripping out hardware
07:35 PM rue_shop1: 4 3d printers is a start
07:35 PM rue_shop1: we need that large cnc
07:35 PM rue_shop1: so should that be a focus this summer??
07:35 PM rue_shop1: hmm
07:39 PM Tom_L: naw
07:40 PM Tom_L: too hard for you to get tooling for it
07:40 PM rue_shop3: 48x96" table router
07:40 PM rue_shop3: the one that furry wont compromize on to get working
07:40 PM Tom_L: go get furry's
07:41 PM rue_shop3: it'd cost more than I can build one from scratch
07:41 PM Tom_L: maybe
07:41 PM Tom_L: and it's not that solid anyway
07:41 PM rue_shop3: it would
07:43 PM Tom_L: if i had no limitations i'd have as many of those as you do printers
07:45 PM rue_shop3: dont know if I'll go to china in the newyear for vaccation
07:46 PM Tom_L: too much smog for me
07:46 PM rue_shop3: the thought occured to me to maybe have you me and z co-ordinatine a meeting somewhere in the middle
07:46 PM Tom_L: i've heard horror storries about the smog
10:06 PM rue_shop1: I'v also been told our forrest fire smoke was 3x worse
11:29 PM rue_mohr: hello?
11:30 PM flav0r: WHATS UP????
11:30 PM rue_mohr: flav0r, do you have any sugar cubes?
11:30 PM flav0r: nope
11:31 PM flav0r: i dont keep sugar at home
11:31 PM rue_mohr: hmm
11:31 PM rue_mohr: damnit, i need to know the dimensions
11:31 PM flav0r: id guess 10mm
11:31 PM flav0r: but then maybe differen t sizes in different countries
11:36 PM rue_mohr: http://www.lanticrogers.com/en/products/fine-white/
11:36 PM rue_mohr: "Dear Rogers, I am trying to take over the world, but am being held up because I cannot verify the size of your sugar cubes...
11:41 PM rue_mohr: sent! I can expect an answer somewhere between 48 horus an eternity!