#robotics Logs

Oct 02 2014

00:31 rue_bed-aok I think kat thought you would
00:59 deshipu google challenge?
08:53 CyberAngel Anyone here part of the First Robotics Competition?
09:08 rue_house CyberAngel, what do you want to know?
09:09 rue_house deshipu, google's power supply challange
09:09 rue_house google is frustrated cause they cant buy the power supply they want anywhere, so they took the specs and started a challange
09:11 CyberAngel rue_house: just curious about your experience. I just volunteered to be help mentor a group here
09:14 rue_house TELunus, has been in a few rounds
09:23 CyberAngel rue: thanks, I'll ask TELunus
09:23 CyberAngel installing the NI stuff atm. Damn things takes forever to install
09:37 CyberAngel Our team is a rookie team this year in the competiton. I couldn't believe what it costs just to get the basic setup going
09:38 CyberAngel thankfully a more established group nearby gave use a ton of equipment last night
09:38 CyberAngel now we need to find sponsors and order even more equipment
19:38 rue_house first definitly makes its money
19:40 rue_house so then today I'll work on the electrical for ths septic system
19:40 rue_house its just down to the easy stuff
21:10 Tom_itx why does one of those need electric?
21:25 Tom_itx rue_house, have you ever tried a PATA to SATA adapter?
21:54 rue_shop2 Tom_itx, yea, worked fine
21:54 rue_shop2 Tom_itx, 70 feet uphill to the field
21:57 Tom_itx have you ever seen a 2.5" PATA drive adapter to SATA?
21:57 Tom_itx i'm looking but finding both to USB
21:57 rue_shop2 I think they are there
21:58 Tom_itx http://www.ebay.com/itm/SATA-PATA-IDE-Drive-to-USB-2-0-Adapter-Converter-Cable-for-2-5-3-5in-hard-drive-/321538137406?pt=US_Drive_Cables_dapters&hash=item4add2a9d3e
21:58 rue_shop2 so I dint' get the septic done, I got the boiler up
21:58 rue_shop2 kinda
21:58 Tom_itx is that usb only output or can it be any?
21:58 rue_shop2 its not running right
21:58 Tom_itx i want a 2.5" pata to connect to a sata cable
21:58 Tom_itx not USB
21:58 rue_shop2 usb, the other thing is a power supply
21:58 Tom_itx yeah
21:59 Tom_itx i just can't tell if it's USB only output
21:59 Tom_itx or any
22:00 Tom_itx http://www.ebay.com/itm/Protronix-SATA-IDE-PATA-to-USB-2-0-Adapter-for-2-5-3-5-Hard-Drives-/151320508634?pt=US_Drive_Cables_dapters&hash=item233b67b8da
22:00 Tom_itx that has a better pic
22:00 rue_shop2 http://www.ebay.com/itm/Mini-7-15-Pin-Female-SATA-HDD-SSD-TO-2-5-Male-IDE-Adapter-Converter-For-laptop-/110999547832?pt=US_Drive_Cables_dapters&hash=item19d816afb8
22:01 rue_shop2 oh, hmm
22:01 rue_shop2 wrong way?
22:01 rue_shop2 the last one I got said it was bidirectonal, it hasn't arrived yet
22:01 Tom_itx that's pata to pata
22:01 Tom_itx i have a bunch of those
22:01 Tom_itx from small drive format to large
22:01 rue_shop2 http://www.ebay.com/itm/Mini-7-15-Pin-Female-SATA-HDD-SSD-TO-2-5-Male-IDE-Adapter-Converter-For-laptop-/110999547832?pt=US_Drive_Cables_dapters&hash=item19d816afb8
22:02 rue_shop2 I think you just use that one with a cable
22:02 rue_shop2 wait...
22:02 Tom_itx you do but that's not what i'm after
22:02 rue_shop2 wtf
22:02 Tom_itx same link btw
22:02 rue_shop2 yea, that IS a converter for using a pata drive with a sata board
22:02 rue_shop2 I see the chip now
22:03 Tom_itx http://www.ebay.com/itm/Protronix-SATA-IDE-PATA-to-USB-2-0-Adapter-for-2-5-3-5-Hard-Drives-/151320508634?pt=US_Drive_Cables_dapters&hash=item233b67b8da
22:03 rue_shop2 what do you want then, pata motherboard to sata drive?
22:03 Tom_itx take a look at that one
22:03 rue_shop2 why, its usb
22:03 rue_shop2 you dont want usb, you said you didn't
22:03 Tom_itx i want to plug a SATA 2.5" laptop drive into a SATA plug on the MB
22:04 Tom_itx but that link also shows a SATA plug on top of the connector
22:04 rue_shop2 what?
22:04 rue_shop2 both are sata?
22:04 rue_shop2 then you dont really need anything
22:04 Tom_itx one side is large pata the other side is small pata and the top is sata
22:05 Tom_itx out to USB i guess
22:05 Tom_itx but i was hoping i could plug the drive in the side and output to the top SATA plug
22:05 rue_shop2 tom
22:05 rue_shop2 'i want to plug a SATA 2.5" laptop drive into a SATA plug on the MB'
22:05 rue_shop2 ^^ is that true?
22:05 Tom_itx yes
22:06 Tom_itx why wouldn't it be?
22:06 Tom_itx i have 2 spares
22:06 Tom_itx and would like to use them on SATA instead of PATA
22:06 rue_shop2 you keep switching betweeen the drive being sata and pata
22:06 Tom_itx no i never switched
22:06 rue_shop2 so, what do you want, sata or pata
22:06 rue_shop2 <Tom_itx> one side is large pata the other side is small pata and the top is sata
22:06 rue_shop2 <Tom_itx> out to USB i guess
22:06 rue_shop2 <Tom_itx> but i was hoping i could plug the drive in the side and output to the top SATA plug
22:06 Tom_itx the confusion is reversed tonight
22:06 rue_shop2 ^^ that time you said pata to sata
22:07 rue_shop2 'i want to plug a SATA 2.5" laptop drive into a SATA plug on the MB'
22:07 rue_shop2 ^^ that time you say sata to sata
22:07 Tom_itx err sorry
22:07 rue_shop2 yea, tell me which story is true
22:07 Tom_itx parallel to serial
22:07 rue_shop2 ok!
22:07 Tom_itx :D
22:07 rue_shop2 do you have a 2.5" pata cable?
22:08 rue_shop2 some laptops have them
22:08 Tom_itx i dunno but i do have 2.5 to 3" adapters
22:08 Tom_itx to the big ribbon
22:08 Tom_itx i don't think i have any small ribbons
22:09 Tom_itx i could use USB but i'd rather not
22:10 Tom_itx the problem with using USB is i may or may not be able to boot from it
22:10 Tom_itx and i need to boot from it
22:10 rue_shop2 http://www.ebay.com/itm/150-MB-s-SATA-Serial-ATA-1-0-ATA100-133-to-IDE-PATA-HDD-Converter-Adapter-Cable-/311088530469?pt=US_Drive_Cables_dapters&hash=item486e524425
22:10 rue_shop2 the one I got turned a pata drive into sata
22:11 rue_shop2 !? ok?
22:11 rue_shop2 its wrong size, convert it. :)
22:11 Tom_itx close but i can't see the gender of the parallel plug
22:11 rue_shop2 yes you can, its female
22:12 rue_shop2 squint harder
22:12 Tom_itx i'm not sure i have any male ribbon plugs
22:12 Tom_itx my eyes hurt tonight
22:12 Tom_itx and are blurred
22:12 rue_shop2 you dont need one, you stick the drive right onto it
22:12 rue_shop2 +- converter
22:12 Tom_itx is that 3" or 2.5?
22:12 Tom_itx it doesn't matter but..
22:12 rue_shop2 its big
22:12 orlock i have some SATA drives that plug right into the motherboard socket
22:12 Tom_itx ok
22:13 rue_shop2 .1" spacing
22:13 Tom_itx now see if you can find a small one :D
22:13 Tom_itx for a 2.5" drive
22:13 rue_shop2 no, I need to tend the boiler and eat :)
22:13 orlock they are like, 4 gig flash drives - main annoyance is they need a pissy tiny little power connector
22:13 Tom_itx i think i have the connector
22:15 Tom_itx http://www.ebay.com/itm/Protronix-SATA-IDE-PATA-to-USB-2-0-Adapter-for-2-5-3-5-Hard-Drives-/151320508634?pt=US_Drive_Cables_dapters&hash=item233b67b8da
22:15 Tom_itx i may get one of those too for backup drives
22:15 Tom_itx i wonder if ghost would work on those
22:58 rue_house the boiler is NOT heating up, gonna have to tear into it tommorow and clean out the fire pit
22:59 rue_house it could hardly get itself into secondary combustion
22:59 rue_house did NOT wanna stay there
22:59 Tom_itx gonna frost tonight
23:02 orlock my woodshed is almost full
23:03 orlock got a pile of wood to split and some to saw up too
23:04 rue_house most people cut it to length first, then split it
23:05 rue_house oh, sorry i read that wrong
23:05 orlock branches too thin to split
23:05 orlock but too long to shove in heater
23:07 orlock i should split and cut them while its green right?
23:08 rue_house I got the tank up to 32c tho
23:08 Tom_itx splits easier when frozen
23:08 rue_house orlock, its all about surface area, go to them with the chipper
23:09 Tom_itx how much wood can a wood chuck chuck...
23:09 Tom_itx k now for the wait from china
23:09 rue_house till he gets a sliver, then he's on compo as long as they will let him be
23:10 Tom_itx i got one of each of those
23:10 rue_house www.ebay.ca/itm/161252650992?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
23:10 rue_house these are what I just got, I cant wait to find out what I get
23:11 Tom_itx should work
23:11 rue_house it says its fully bi-directional
23:11 rue_house I really doubt that
23:12 Tom_itx unidirectional
23:12 Tom_itx from china to canada
23:12 Tom_itx gnite
23:13 rue_house I mean, if I saw a listing for a 3 pin regulator that would buck or boost depending on you swapping the input/output lines, I'd bleive it just the same
23:13 rue_house gnight
23:25 marvimias I need to design a two-level circuit that converts 3-bit unsigned binary (U=u2 u1 u0) numbers into 4-bit two's complement representation (T=t3 t2 t1 t0).
23:25 marvimias Another bit, bit S, will decide whether or not the number is positive.
23:25 marvimias If S = 1, T will be positive, and if S = 0, T will be negative.
23:26 rue_house ok
23:27 rue_house draw a table out of all the 3 bit numbers
23:28 rue_house 0 0 0
23:28 rue_house 0 0 1
23:28 rue_house etc
23:28 rue_house (say when done)
23:37 marvimias rue_house, Can you explain what you mean by that?
23:43 rue_house do you know how to count in binary?
23:44 marvimias rue_house, T=(S?(~U)+1:U)
23:44 marvimias Is that correct?
23:44 marvimias rue_house, yes
23:44 rue_house how about make a translational table for figure it out
23:44 rue_house how good are you with tables?
23:45 marvimias rue_house, the first and last are easy: T₃=S∧(⋁U), T₀=S₀ but the other two are harder T₁= T₂=
23:45 rue_house table
23:45 rue_house no equations, table
23:45 marvimias rue_house, what difference does it make
23:46 rue_house you asked for my help
23:47 MrCurious i am not entirely sure that Texas is up for this challenge.
23:50 rue_house should I mention that unsigned to singed conversion will always be positive?
23:53 marvimias rue_house, T(n) = U(n)⊻(S∨-⋀{i∈0..n-1:U(i)})
23:54 marvimias which in English is: Tn is the same as Un, unless S and at least one of the U(n-1)...U0 are 0
23:55 rue_house dude
23:55 rue_house 3 bits unsigned
23:55 rue_house the options are 01234567
23:55 rue_house express 01234567 in a signed number
23:55 rue_house 0 = 0
23:55 rue_house 1 = 1