#robotics Logs

Apr 10 2013

01:24 GargantuaSauce_ will an insomniac do?
01:24 Hukka There's nothing to talk about right now
01:25 Rif more pictures
01:28 MrCurious totally
01:29 MrCurious the odroid-u2 has been up 3:30 hours. the raspberry pi + 10dof board + gps + rtc + 2 * wifi nic's has een up 1:30
01:29 MrCurious lipo is now down to 11.8 from 12.4
01:30 MrCurious beginning to believe this will be enough to power the brains of this robot, possibly the motors too
01:34 Rif do you know the actual current draw?
01:34 MrCurious nope
01:34 MrCurious its using 2x3 lipo cells from old mac book pro batteries that say 11Wh on the side
01:34 Rif just put an ammeter inline with one side of battery
01:35 MrCurious will have to do that tomorrow. this was just a rough test to see if it was 30 minutes then empty
01:35 MrCurious for the real test, i need to get the kinect in the circuit too
01:36 MrCurious then get it all streaming
01:36 MrCurious its strange how after chasing robotics as a hobby for 2 years, stuff is finally starting to come together, as i crossed the tipping point of clue in all the required areas
01:37 MrCurious mechanical, power, processing, video, software, uC, motor drivers, stepper drivers.
01:37 Rif yep, feels good, i am having so much more success this time around as well
01:37 MrCurious thought it was going to just be a 2 month quest at the start
01:37 Rif yeah sooo many fields to know
01:38 MrCurious so many rabbit holes to avoid... so easy to fall in to them and get lost
01:38 MrCurious like the avr vs arduino war
01:38 MrCurious fall in teh AVR hole, and you end up spending long long time on uC code. avoid it with arduino code, and your code is less efficient, but good enough to do what you need
01:40 Rif heh, since i struggle with software am using any shortcuts i find to have more stable sensors etc
01:41 MrCurious what is your chosen line of work rif?
01:41 MrCurious i am a programmer by training
01:41 Rif been IT for 20 years, but now i change every year or 2, and a machine operator now
01:41 Rif just about to shut router off and go home
01:41 Rif and cad stuff to make the machine work
01:41 MrCurious fly and be free....
01:42 MrCurious i got that on my to do list
01:42 Rif k back in a while
01:42 MrCurious CNC and extruder
02:22 RifRaf hrm wats the site that helps me win stuff on ebay? need to get new phone and will forget
02:22 RifRaf gixen
06:09 RifRaf so glad i made that current meter logger now, is hooked up on new bot, draws 10A spinning wheels full speed and not even on ground
06:12 RifRaf upto 20A going into reverse suddenly, and you can see the negative current fed back to batteries when you stop, like -6A spikes
15:26 Tom_itx http://www.electronicproducts.com/Electromechanical_Components/Motors_and_Controllers/Ion_thrusters_provide_55_times_more_propulsion_than_jet_engines.aspx
15:41 LoRez can I get one of those on my car?
17:45 GargantuaSauce_ >Ion thrusters provide 55 times more propulsion than jet engines
17:45 GargantuaSauce_ what a misleading title
17:46 GargantuaSauce_ they provide more SPECIFIC IMPULSE
17:46 GargantuaSauce_ with stupidly low thrust
17:46 Skwint they provide a 55 times more thrust-per-energy-input
17:47 Skwint but then I provide significantly more thrust than a racing car, based on that principle
17:47 Skwint I'm wondering if you could increase the thrust by spraying a fine mist of water vapour into it
17:47 Skwint so it pushes something a bit heavier than a column of air
18:17 dunz0r This is going quite well! https://www.youtube.com/watch?v=f11fKuj7024
18:22 GargantuaSauce_ ehehe it's so little :V
18:28 dunz0r Yep. 10x10cm
18:39 RifRaf dunz0r thats a nice fast little robot, what sensors are used to locate the object?
18:41 dunz0r RifRaf: Sharp GPY2Dsomething, 4-30cm. And two 5cm ones at the side
18:41 dunz0r Two of the 4-30cm ones in the front
18:43 Jak_o_Android Electronics
18:43 Jak_o_Android Dammit
20:34 RifRaf fuck it i need a waterjet cutter
20:34 RifRaf stainless steel sucks
21:29 MrCurious i love opening up stuff and finding a nice set of lipo batteries :D
23:29 rue_house its amazing how soft stainless is till it workhardens
23:46 RifRaf did 3 $60 bits before morning tea
23:47 RifRaf gonna get waterjet to do it for me
23:55 RifRaf het rue_house , are you working on a big secret project or just not doin much lately?
23:58 rue_house no
23:58 rue_house just more all over the place