#robotics Logs

Oct 30 2013

00:02 defaultro is this another symbol for GND, / / / with a bar on top?
00:03 defaultro found it, http://www.beam-wiki.org/w/images/7/7a/Ground_Symbols.GIF :D
00:03 defaultro now I'm talking to myself, hehehe
00:04 defaultro yes, I have tons of IN4001 :)
00:05 katsmeow-afk the TIP122 is also a darlington, the TIP42 isn't
00:06 defaultro omg
00:06 defaultro i was looking at my IN4001 in my breadboard, the neg side is connected to +
00:06 katsmeow-afk ther were 3 versions of GND once, now there's just the two, one is earth gnd, one is chassis gnd, and they may not be the same voltage and may not be connected togther
00:06 defaultro i'll look again
00:07 defaultro can I use my TIP122 since i don't have tip42
00:07 defaultro i know where BCE are on my tip122
00:07 katsmeow-afk obviously you did not read the difference tween t npn and apnp
00:08 katsmeow-afk sure you can use it, maybe the smoke will get you to rtfm
00:08 katsmeow-afk bye
00:08 defaultro k
00:08 hackman127 The main difference between the two is that if you use an NON in place of a PNP, you'll hear a pop and a sizzle, and your stuff won't work.
00:09 hackman127 NPN
00:09 defaultro k
00:09 defaultro I won't do it then. I'm worried. I'll buy TIP42 instead
00:10 defaultro but still wondering why my diode's negative is connected to the + side
00:10 defaultro my diode is connected to the collector
00:13 defaultro i think this is a good one for me, http://www.markallen.com/teaching/ucsd/147a/lectures/lecture3/10.php
00:24 defaultro katsmeow-afk: I hope I finally got it correctly, please verify - http://neil.privatedns.org/tip42_and_centertapwire.png
00:36 MrCurious hello
00:37 MrCurious cat has stopped eating again
13:31 tsmeow-afk installs 4 weedwhackers side by side across the kid's gocart, and lets them go ride around in the back field all day for
13:39 tsmeow-afk comes home and finds the cops with complaints from pilots who can read the cursewords the kids mowed into the back f
13:40 tsmeow-afk cusses the lil hac
13:42 katsmeow-afk "i'm sorry to bother you, but our spy sats picked up small height deviations in the grass in your lawn, in the shape of words,,,, seems your mowerbot wants to be set free?"
13:44 katsmeow-afk "no ma'am, we are not spying on you, but we are recording how high each blade of grass is in your yard."
18:04 tubes4branes hi
18:05 tubes4branes Does anyone know if NASA has the Mars Science Rover's Fiducials anywhere for download? They are the radial/circular fiducials.
18:07 katsmeow-afk fiducial : Relating to or of the nature of a legal trust (i.e. the holding of something in trust for another)
18:07 tubes4branes and also as a marker unless I spelled it wrong?
18:07 katsmeow-afk marker of what?
18:08 tubes4branes for 3d computer vision and orientation.
18:08 tubes4branes Like AR markers.
18:08 tubes4branes like reactables.
18:08 tubes4branes etc...
18:08 katsmeow-afk http://en.wiktionary.org/wiki/fiducial
18:11 katsmeow-afk https://www.google.com/search?q=Mars+Exploration+Rover+Instrument+Positioning+System
18:12 ace4016 http://www.huffingtonpost.com/2012/08/30/mars-rover-curiosity-fiducials_n_1844679.html
18:12 tubes4branes yes.
18:12 ace4016 NASA probably doesn't have them for download
18:12 ace4016 but apparently they're fairly common...and look really simple
18:12 tubes4branes http://en.wikipedia.org/wiki/Fiduciary_marker
18:12 tubes4branes yeah, they would be easy to recreate, and could be done with a little of processing code or something.
18:13 ace4016 you don't need NASA to get them though; seems common enough in computer vision
18:13 tubes4branes I thought for some reason that the Rovers were open at least when it came to blueprints and such, as there were enthusiasts that built replicas of the earlier Mars rovers.
18:14 tubes4branes ace4016: I looked in computer vision and didn't find the radial / circular ones were very common.
18:14 katsmeow-afk i picked the "positioning system" as a search term because it may give urls for how that data is used on the rover, not just how made and where they are
18:14 tubes4branes I wonder if the code to process those is harder or easier than the circular ones?
18:14 ace4016 the circular ones are easier
18:14 ace4016 simple to compute the center of the circle
18:15 ace4016 which is why they were used (which makes sense)
18:15 tubes4branes that makes sense, and then I'd also like to use those for my computer vision project.
18:21 ace4016 heh, it's simple to create
18:22 ace4016 just a circle split into alternating quarters
18:22 ace4016 with an outer circle with alternating quarters as well
18:24 katsmeow-afk well, you also scratch the ground, run the rover wheel steppers out 20ft, look behind you to where you started, and that's 20ft of cal data from your ground scratcher
18:24 katsmeow-afk or 100ft, etc
18:24 tubes4branes interesting.
18:24 tubes4branes thanks guys :)
18:24 tubes4branes thanks ace.
18:25 tubes4branes yeah, I will code something up to automate them for different tags.
18:26 katsmeow-afk there's some astronomy peoples in here, they know about measuring on space stuff
18:29 tubes4branes The fidicuals on the rover just looked easy to work with, which is where I wanted to start.
18:29 tubes4branes :)
23:02 MrCurious hah! a pinata loaded with bacon!
23:02 katsmeow-afk yummy!
23:03 MrCurious found out today, i did not get the job i interviewed 5 times for
23:03 Curious makes the such is life
23:03 katsmeow-afk se la vie
23:03 MrCurious it was great interviewing experience. look at the pus side
23:03 MrCurious plus
23:04 MrCurious the pus side is failure hurts
23:04 MrCurious :)
23:04 tsmeow-afk never looks on the pus
23:05 MrCurious always look on the blight side of life *whistles*
23:06 katsmeow-afk lol
23:07 MrCurious route once, solder twice
23:07 MrCurious no... thats not it
23:09 katsmeow-afk yeas, wire has two ends, if you solder one and route,, wait, still not right
23:10 MrCurious route twicec, solder once
23:11 katsmeow-afk i whipped out a soldering iron once and someone jumped back and asked "shouldn't we be wearing face protection helmets and fireproof clothes?"
23:12 katsmeow-afk because on tv when anyone solders,, they use a wirefeed welder cranked up to "sparkle"
23:12 MrCurious apparently the mortality rate in frogs is rather high
23:12 MrCurious they croak at night
23:12 katsmeow-afk not all of them
23:13 MrCurious hmmm take a TIG welder and miniturize it into a soldering iron format
23:13 MrCurious that could be super pro
23:13 katsmeow-afk really, near as i can tell, all the ones that croaked here is *because* they croaked, got the rattlesnake's attention, they did
23:28 katsmeow-afk this month it has been on the market just short of 2 yrs since i left it
23:29 MrCurious you lost me
23:30 katsmeow-afk i lost it too, and the correct channel to say that in
23:33 MrCurious hah
23:34 MrCurious watching tomorrow people. seems like a series based on jumper movie. except jumpers are aliens and not mutants
23:35 katsmeow-afk never heard of it, all i can get here is abc
23:36 MrCurious its on "the CW"
23:37 katsmeow-afk i lost them, and pbs and cbs and an independant when the change to digital happened
23:38 MrCurious i had heard "the change" could be tramatic
23:41 tsmeow-afk is still freaked and needs counce
23:41 katsmeow-afk i didn't mind getting a better picture, but i had hoped it would be a pic worth watching,, but what i got was the worst of the lot
23:42 katsmeow-afk but it's a wonderful clean digital picture
23:55 MrCurious have you put up an antenna
23:55 MrCurious i think cableis required to provide free OTA channels
23:55 katsmeow-afk what's an "antenna"?
23:55 MrCurious its what people used before and after the age of digital
23:56 katsmeow-afk wait, paid cable is required for free Over The Air channels?
23:56 MrCurious i put up an old style flying V array tv antenna
23:56 MrCurious got lotsa channels after the change
23:56 tsmeow-afk wonders if MrCurious is seriously asking her about ant
23:56 tsmeow-afk was building yagi's inverted V, longwires, in the early 19
23:57 MrCurious my spidy sense is telling me its time to back away from this potentially disturbing possibe miscommunication
23:57 rgantuaSauce installs a high-gain antenna on MrCur
23:57 MrCurious and yet you have a antenna that can get but ONE channel
23:57 katsmeow-afk i had an antenna farm growing int he back yard, with my up in the telephone pole, the oak trees, the barn, teh attic, etc
23:57 katsmeow-afk yeas
23:57 MrCurious GargantuaSauce: you were right. DX is sending me the missing brackets. totally cool company with good cust service
23:58 katsmeow-afk i can get FM stations from 80 miles, but just the one tv signal
23:58 katsmeow-afk i useto pull in AM from S America, and from across the CTUSA
23:59 MrCurious perhaps you should investigate xbmc + plugins like navi extreme and get lots of free channels and stuff
23:59 MrCurious i hear alll the cool kids are doing it