#robotics Logs

May 18 2017

12:01 AM rue_house: I mean really, who wants to be dictated to?
12:04 AM rue_house: ok
12:04 AM rue_house: ""
12:04 AM rue_house: here I will spell out how to do a few mods to a nice cheap hobby servo to
12:04 AM rue_house: get some extended features out of it.
12:04 AM rue_house: to
12:04 AM rue_house: here I will go over several mods you can make to a nice cheap hobby servo to
12:04 AM rue_house: get some extended features out of it.
12:05 AM rue_house: damn I just fell asleep
12:09 AM rue_house: I need a victim
12:09 AM rue_house: er, test subject
12:10 AM rue_house: anyone have an avr/arduino and want to be a test subject to modify a 9g servo into awesomeness?
12:10 AM rue_house: I'm feeling a 'naaa' here
12:10 AM rue_house: cmon, sacrifice limbs for science
12:10 AM LoRez: I've got a couple?
12:10 AM LoRez: tree limbs?
12:10 AM rue_house: see thats the spirit
12:10 AM rue_house: sure, see, if there is a will there must have been a whey
12:11 AM rue_house: LoRez, you ahve time now to play?
12:11 AM rue_house: I have 4 minutes
12:14 AM LoRez: probably can't do much in 4 minutes. I don't have a lot of tooling set up right now
12:14 AM rue_house: ok, hows your schedule looking in 20 hours?
12:14 AM rue_house: 4 hours ago tommorow...
12:16 AM LoRez: fine? what are we doing?
12:16 AM rue_house: modifying the 9g servo to read its position and torque
12:17 AM rue_house: do you have a 2N3906 or other small PNP transistor?
12:17 AM LoRez: I'm trying to get a dragon to jtag a mega2560 and apparently none of that shit works.
12:17 AM rue_house: 1k resistor and a 10R resistor?
12:17 AM LoRez: uh? maybe?
12:17 AM rue_house: k
12:17 AM LoRez: dunno
02:21 AM anonnumberanon: The torque of a 9g servo is actually a constant; a constant, equal to 0.
02:22 AM anonnumberanon: Question: can big data be used in robotics?
05:07 AM Jak_o_Shadows: rue, I have some 9g hobby servos, and I bought some PNP transistors (that you suggested in the past) for the exact purpose of getting torque out.
05:07 AM Jak_o_Shadows: Using your method.
05:07 AM Jak_o_Shadows: So rue_house, do you just tap into the pot as well?
05:08 AM Jak_o_Shadows: Through, this is a bit of a moot point, I don't have the stm32's driving servos yet.
05:08 AM Jak_o_Shadows: The stewart platform is approx half printed though.
09:11 AM rue_house: Jak_o_Shadows, hey I dont have any stm32 driving servos yet either
09:11 AM rue_house: maybe there can be something in it for me
09:11 AM rue_house: Jak_o_Shadows, the two mods are to tap the pot, and one side of the motor
09:12 AM rue_house: the circuit for current detection sits on the outside of the servo
09:12 AM rue_house: with the 10R, PNP and two 1k's for voltage division
09:12 AM rue_house: stm32...
09:13 AM rue_house: stm32--109?
09:14 AM rue_house: 103
09:14 AM rue_house: STM32F103C8T6
09:15 AM rue_house: only 2 adc :/
09:17 AM rue_house: oooh 2 adc + multiplexors
09:23 AM rue_house: 2.5ms
09:23 AM rue_house: 50hz
09:23 AM rue_house: 8 channels on the nose
09:24 AM rue_house: there are lots of timers, so
09:26 AM rue_house: I need a document that describes the io programming better
09:29 AM rue_house: prolly cant do 16 channels due to adc count limits
09:29 AM rue_house: 8 might be an ok start
09:40 AM rue_house: so, hmm
12:16 PM Snert_ is now known as Snert
12:20 PM veverak: stm32 got some fame in our hackespace
12:20 PM veverak: used a lot
12:20 PM veverak: but for know, haskell + ivory tower wins as coding language
01:13 PM * anniepoo is watching the CNC lathe be wheeled in
01:13 PM Snert: ...and what snail part will it make? :)
01:14 PM anniepoo: who knows
01:15 PM anniepoo: snail's more a manual lathe kinda gal
01:15 PM Snert: undercarriage bearing races or something I guess.
01:16 PM Snert: maybe a turret thing for the head.
01:45 PM anniepoo: parts for the printer
01:45 PM anniepoo: Pomatia's got a receipt printer under her butt, so she can leave behind bits of paper
02:51 PM justan0theruser is now known as justanotheruser
04:28 PM Tom_L: LoRez, get much of a storm down there?
04:33 PM LoRez: Not here yet.
04:34 PM Tom_L: they must be expecting something here. all the city trucks parked under bridges etc
04:34 PM Tom_L: alot of the dealer lots moved their inventory to parking garages
04:51 PM LoRez: That's a bad place to be putting vehicles. It makes it worse in the wind.
05:58 PM Tom_L: the place they put them is fairly protected
06:17 PM veverak: deshipu: I am thinking about making esthetically good looking version
06:17 PM veverak: like out of scifi movie
06:17 PM veverak: (of tote)
06:17 PM veverak: hmm
06:18 PM veverak: really considering putting two servos on femur arm (one from tibia, one from coxa)
09:29 PM LoRez: Tom_L: they turn into venturis. can literally blow them out from under the bridge
09:42 PM rue_house: yay I picked up $60cad after work today that I'm gonna spend in china!
09:43 PM rue_house: $40usd
09:47 PM anonnumberanon: rue_house, that's enough for 40 pieces of really cool things you can play with, or 20 pieces of way better things, or 10 pieces of super geek level gear
09:47 PM anonnumberanon: good luck on the Alibaba cavern
09:47 PM anonnumberanon: :)
10:29 PM anniepoo: whoot
11:01 PM rue_house: ARG I hate it whe you buy soemthing and scroll down to find a lot of 50pcs for what you just paid for 20pcs
11:07 PM orlock: rue: what about shipping though?
11:07 PM rue_house: shipping is free from china DUH
11:07 PM rue_house: :)
11:08 PM orlock: apparently this term at my daughters school its all about coding and technology and stuff
11:08 PM rue_house: is there any point, everyone hires out to china
11:08 PM orlock: they have a thing, like an Excursion, except its within the school and they call it an Incursion
11:09 PM rue_house: thats why I'm not coding still
11:09 PM orlock: so they are going to have people teaching about robots and stuff
11:09 PM rue_house: for money anyhow
11:09 PM orlock: so it's going to be a Robots Incursion
11:09 PM orlock: which actually sounds kind of scary?
11:09 PM orlock: OH NO THE ROBOT INCURSION IS HAPPENING!
11:09 PM orlock: "Daddy, did you lose your legs in the robot incursion?"
11:09 PM orlock: etc
11:13 PM rue_house: I have 9.77 left
11:14 PM orlock: 9.77 what?
11:14 PM orlock: minutes?
11:15 PM orlock: cubic feet of air?
11:15 PM rue_house: usd
11:32 PM rue_house: 6.17
11:48 PM anonnumberanon: buy some arm st00f?
11:49 PM rue_house: 00?
11:49 PM rue_house: stm32?
11:49 PM anonnumberanon: stuff
11:49 PM anonnumberanon: st00f
11:49 PM anonnumberanon: but not the usual stuff, it's boring
11:49 PM anonnumberanon: some weird arm man
11:51 PM anonnumberanon: then write Ada for it
11:51 PM anonnumberanon: just for the brainfuck
11:56 PM rue_house: OOOoOooOooOoO
11:56 PM rue_house: I dotn know
11:56 PM rue_house: https://www.aliexpress.com/item/W27C512-45Z-W27C512-DIP-IC-EEPROM-512KBIT-45NS-NEW-GOOD-QUALITY/32728172730.html
11:56 PM rue_house: so cheap...
11:57 PM rue_house: but I have so many uv eproms...
11:59 PM rue_house: at 8Khz, how much 8 bit audio can I save to a 64Kbit memory chip
11:59 PM rue_house: 1 second
11:59 PM rue_house: thats enough time to say hello