#garfield Logs

Sep 19 2014

19:53 dumbass Only 5 billion years until The Milky Way gets gobbled up
19:53 dumbass Washington Post - ?7 hours ago?
19:55 dumbass This year, Greenland's ice sheet was the darkest Box has ever measured.
19:56 dumbass over the last two or three years, Box calculated that Arctic fires have been burning at a rate that's double that of just a decade ago.
19:56 dumbass Box is not a bot
19:57 dumbass In total, more than 3.3 million hectares burned in Canada's Northwest Territories alone this year�nearly 9 times the long term average�resulting in a charred area bigger than the states of Connecticut and Massachusetts combined.
19:57 dumbass the massive Birch Creek Complex, which could end up being the biggest wildfire in modern Canadian history. In July, it spread a smoke plume all the way to Portugal.
19:59 dumbass www.motherjones.com/environment/2014/09/why-greenland-dark-snow-should-worry-you
20:01 dumbass according to http://darksnow.org/ , part of the darkening of the snow/ice is mold, Greenland snow is moldy because no one has cleaned it
20:05 dumbass http://darksnow.org/wp-content/uploads/2014/07/assets-climatecentral-org-images-uploads-news-7_16_14_Brian_NWTFiresAerial-640x480.jpg
20:11 dumbass 74vhct573 are 0.6 cents each now
20:30 dumbass just when you thought you knew what a 7404 is, the IRF7404 is a sot-8 mosfet, 20v .040 ohms , 6Acont , 27Apulsed
20:31 dumbass $6 per 100
20:32 dumbass course, 6amps at .040 ohms is 1.44 watts , so it's outa spec
20:42 dumbass FAA Issues Spaceport License to Midland Airport in Texas
21:04 dumbass Omaha's first commercial 3D printing service opens shop
21:09 dumbass <waste of money>
21:09 dumbass During the pursuit, the van struck Gordo, a young Maltese mix that ran into the street.
21:09 dumbass The fluffy white dog received a deep gash to his back leg and a crushed hip. Vets trying to save his leg removed part of his hip joint on Thursday and repaired other damage.
21:09 dumbass Next week, the dog will run into the street again, and they'll blow anotehr few hours in surgery on it.
21:09 dumbass </waste of money>
22:43 dumbass Total names in #robotics : 67
22:48 rue_mohr2 kat, its dissapointing isn't it?
22:48 dumbass incredibly
22:49 dumbass but then, they look down on me, so what's that make me?
22:49 Tom_itx short?
22:50 dumbass short of alot of whatever people look up to
22:50 dumbass what are you doing Tom?
22:50 Tom_itx going to sleep
22:50 rue_mohr2 I have to work had to not be depressed
22:50 rue_mohr2 that the universe will start to fizzle out in about a billion years
22:51 rue_mohr2 about a billion years ago soemthing changed, and the rate of dissipation is going up exponentially
22:51 dumbass if i could save it, they'd al turn me down
22:52 rue_mohr2 so, I'll just play
22:52 rue_mohr2 I wonder if I can write that pwm eprom today
22:52 rue_mohr2 I just came back from a trip to the hospital
22:52 rue_mohr2 the truck is full of printers and UPS'
22:53 dumbass i wonder if enough energy-producing matter cold be accumulated to last thru one end of universe till the start of the next
22:53 rue_mohr2 dark matter is interesting
22:53 dumbass but it won't keep you warm
22:54 rue_mohr2 dark energy being the counteracting force to gravity, which as of 1 billion year ago's force has surpassed that of gravity
22:55 dumbass makes no sense, matter has gravity, excessive dark matter will have excessive gravity
22:55 rue_mohr2 2020 hind sight, you would have loved the presention by the astrological society last weekend
22:55 rue_mohr2 do you have a passport?
22:55 dumbass yeas
22:55 dumbass i want outa this country
22:55 rue_mohr2 I wonder how much a plain trip from alabama is worth
22:55 rue_mohr2 ;)
22:56 dumbass wouldn't it be cheaper to just video the meeting and lemme download it?
22:56 Tom_itx i dislike that airport
22:56 Tom_itx but i dislike the houston airport more
22:56 Tom_itx i was layed over there for 10 hrs once
22:57 Tom_itx rudest people you could ever not want to be around
22:57 e_mohr2 turns kats name tag upside down to see if it says her name r
22:57 rue_mohr2 heh
22:57 dumbass in Houston or Bham?
22:57 Tom_itx bham
22:58 rue_mohr2 pnwqgss
22:58 dumbass you being not from here, i am surprised they didn't shoot you
22:58 e_mohr2 squ
22:58 rue_mohr2 ssgqwnp
22:58 e_mohr2 squints ha
22:58 rue_mohr2 still dosn't say katsmeow
22:59 dumbass rue, someone in #roboTics TOLD me that washing machines have NO SELENOID VALVES, and the humans there believed him
22:59 rue_mohr2 not even in the mirrow
22:59 dumbass i stupidly believe they do
22:59 rue_mohr2 obviously someone who knew nothing about washing machines
22:59 rue_mohr2 I'm still collecting for the mecha
23:00 rue_mohr2 I should try harder I think I'm only up to like 20 or so
23:02 rue_mohr2 huh, didn't scroll back yesterday
23:02 rue_mohr2 cute
23:02 dumbass hmm?
23:02 rue_mohr2 I'm sure that washing machine valves are good for 80psi, I wonder how high they can go
23:03 rue_mohr2 but really, working with air muscles, like 60 is more than all you could ever need
23:03 rue_mohr2 too much and the bladder is pushed thru the mesh, which leads to popping :)
23:03 dumbass i would be very afraid of a air robot dropping a heavy load, the tension in the arm muscles may cause the robot to doa flip
23:04 rue_mohr2 when used for air the washing machine valves need a little back pressure,or the diaphram bounces when it closes, cuasing farting noises
23:05 rue_mohr2 ANY WHO, I ASK YOU WHO!, WANTS A F A R T I N G ROBOT!?
23:05 dumbass GargantuaSauce
23:05 rue_mohr2 OH
23:05 rue_mohr2 well ok
23:05 rue_mohr2 hmm
23:06 rue_mohr2 shoudl I stay up or go to sleep?
23:06 dumbass both, you can unlead the truck in your sleep
23:06 rue_mohr2 I got a bunch of LM393 for comparitors, but between ordering them and getting them I decided they are a bit slow
23:06 dumbass yeas, they are slow
23:07 rue_mohr2 whats a fast comparitor?
23:07 dumbass op37
23:07 rue_mohr2 isn't that an opto isolator?
23:07 dumbass nope, opamp, so is the AD746 , which is even faster
23:08 rue_mohr2 I was really surprised to see a circuit that used an LM10, I didn't know lm went that low
23:08 dumbass they quit making those yrs ago, afaik, ditto the LM12
23:08 rue_mohr2 hmm, if I have either they are gonna be in the 'misc amp' drawr
23:09 dumbass if you are comparing two signals in a .5v range of each other, and need *REAL* speed, use a MC100 family of ecl differential inputs
23:10 dumbass funny thing about differential input ecl, they have differential ANALOG inputs
23:11 dumbass how fast of a comparitor do you need?
23:11 rue_mohr2 op37 one per package, ok
23:11 rue_mohr2 well, 250khz pwm would be nice
23:12 dumbass the op37 will do *wonderful* 250khz pwm, use good cpacitor pwr bypass and gnd plane
23:12 rue_mohr2 ooo no resistors in its totem
23:13 rue_mohr2 17V/us
23:13 dumbass AD746 = 75V/us
23:13 rue_mohr2 oooo
23:13 rue_mohr2 I'm glad you worked with chips I havn't
23:13 dumbass i have some on pcb from recycling center that go 600V/us
23:13 rue_mohr2 8-|
23:13 rue_mohr2 pn?
23:14 dumbass i forget atm, it's an ADGxxxxxx iirc
23:14 dumbass prolly cannot get them on ebay
23:15 rue_mohr2 do you have a url fragemnt for user/password injection getting into digchip directly without logging in
23:16 dumbass i don't use them
23:16 rue_mohr2 I ahvn't looked at the login page to see what mechanism they use
23:16 rue_mohr2 they are pretty good
23:16 dumbass alldatasheet.com
23:17 rue_mohr2 the "we dint' find your part number but here is a list of useless links datasheet site that *sometimes* has datasheets?
23:17 dumbass those 100's of cable boxes, each has one of several good chips, like 20Mhz 10bit or 8bit adc, a WM8783GED 96Khz sterio dac chip, ram chips, etc etc
23:18 dumbass what part are you looking up?
23:18 rue_mohr2 I look up chips I have in misc bins sometimes
23:18 rue_mohr2 some of the stuff is unsearchable
23:18 mbass
23:18 rue_mohr2 tho I should run them by you
23:19 rue_mohr2 I ahve some MTxxxx that I think are some sorta phone chip
23:19 rue_mohr2 hmmm $1.78ea for AD746 so far...
23:19 dumbass AD8008 1000V/us opamp
23:20 rue_mohr2 yea china knows a good chip
23:21 dumbass if you need *slow* but fantastically accurate, the OP1177-OP2177-OP4177 are amazingly precise in comparing
23:21 rue_mohr2 hmm, 1000V/us, the switching must emit EMI
23:21 dumbass of course it does
23:21 rue_mohr2 copius amounts
23:22 rue_mohr2 8008 is onyl avail in sop
23:22 rue_mohr2 ;) not htat 8008 the opamp one
23:22 dumbass good reason for that, gotta keep lines short at thos speeds, or it will oscillate
23:23 rue_mohr2 8008 for $2.80 ea
23:23 rue_mohr2 oh $1.03
23:23 rue_mohr2 er $1.30
23:24 dumbass that's a good price, the OP37 is prolly more
23:24 rue_mohr2 $1.20
23:24 rue_mohr2 op37
23:25 dumbass good deal
23:26 rue_mohr2 http://www.aliexpress.com/item/10pcs-lot-OP37GPZ-OP37GP-OP37-DIP-8-OP37G-Free-Shipping/2009163836.html
23:26 rue_mohr2 gonna check my bins
23:26 dumbass ye old TL084 can be cheap and quite adequate, but not for 250Khz square waves
23:26 rue_mohr2 I have lots, rail limits and freq limits are problem
23:26 dumbass yeas
23:26 rue_mohr2 I have many TL081/2/4 TL071/2/4
23:27 dumbass depending on who you believe, the -8x parts need a lot of current to drive the inputs at high audio freqs, because of the fets
23:28 rue_shop3 lm358
23:28 rue_shop3 ne5532
23:29 dumbass while back, the 40v version of the -74 was on ebay, i grabbed 250 of them and 1000 of the 40v TL072 for under $10 total
23:29 rue_shop3 lm389
23:29 rue_shop3 lm381
23:29 rue_shop3 xp4739cp
23:29 rue_shop3 lmc6462
23:29 rue_shop3 lm307
23:30 rue_shop3 LM301
23:30 dumbass lotsa numbers, no one has time to work with them all, you pick what works for you
23:30 rue_shop3 NE531
23:30 rue_shop3 ka2209
23:30 rue_shop3 tell me if anything stands out :)
23:30 dumbass i tended to pick the opamps to use as comparators because they also work as opamps :-)
23:31 rue_shop3 M8752
23:31 rue_shop3 LM308
23:31 dumbass the LM3xx are gonna be slow
23:31 rue_shop3 LM387
23:32 rue_shop3 NE532
23:32 rue_shop3 UA798
23:32 rue_shop3 never noticed most of these are 3xx
23:33 rue_shop3 MC1455
23:33 dumbass oollldddiieee
23:34 rue_shop3 BA1032
23:34 rue_shop3 3xxx slow?
23:34 dumbass dunno them
23:34 rue_shop3 3403
23:35 rue_shop3 mc14574 dosn't sound like an opamp
23:36 rue_shop3 I dont think they even fathomed 1000V/us in the days when these chips were made
23:36 dumbass MC14576A is a video apm
23:36 dumbass amp
23:36 rue_shop3 oh
23:37 rue_shop3 funny the things ya find in these bins
23:37 dumbass the 3403 is a 741 clone
23:37 dumbass ditto 3303
23:38 dumbass well, remember the Ghz oscopes used ghz chips to drive the crt plates
23:38 dumbass in the 1980's
23:39 rue_shop3 the datasheet I ahve here says 14574 is 0.8v/us
23:40 mbass had her paws on the first 8bit video flash adc chip the week it came out: 1.2 inch x 3.x inch long, ran so hot it burned the
23:41 dumbass within a year, it was down to a plastic dip-10 or so
23:41 rue_shop3 then the chart shows up to 20V/us at 5V
23:43 mbass soooo misses being useful and intelli
23:43 rue_shop3 you are, your just not feeling it anymore
23:44 rue_shop3 oh looka this, NE592 "video amp"
23:44 dumbass no, when i am TOLD there's no selenoids in a washing machine, and everyone believes them, i am out of the loop
23:45 dumbass watch the 592 about oscillating and preset gain limits
23:45 rue_shop3 fancy chip...
23:46 rue_shop3 gain to 400, 4Mhz bandwidth, they dont say slew rate
23:46 dumbass Tiggr said : NE592= [!what][!electronics][!device] Type:linear ; Function:Differential Video Amplifier ; OEM:Philips Semiconductor, Texas Instruments ; Case:16-pin, 8-pin
23:47 dumbass yeas, ntsc vidio is spec'd to 5Mhz at a min, 8Mhz prefferredd
23:47 rue_shop3 I have 3, one of them still has the thruplating from the board it was in on one of its pins...
23:48 dumbass but if you are driving a ttl input and using it open loop as a comparator, it may work for you at 250Khz
23:48 rue_shop3 I have this too...
23:48 rue_shop3 US733
23:48 rue_shop3 er, UA733
23:48 dumbass LM733= [!what][!electronics][!device] differential video amplifier
23:49 rue_shop3 150Mhz
23:49 dumbass got a LM7121 ?
23:49 rue_shop3 gians of 10, 100, 400
23:49 rue_shop3 no :(
23:49 dumbass gain of 1 is prolly ok for what you are doing
23:50 dumbass LH series has some fast chips
23:50 dumbass Tiggr says LH0063= [!what][!electronics][!device] damn fast buffer amplifier
23:51 rue_shop3 The 733 is intended for use as
23:51 rue_shop3 a high-performance video and pulse amplifier in communications,
23:51 rue_shop3 magnetic memories, display and video recorder systems.
23:51 rue_shop3 :)
23:52 dumbass mag memories are not nesisaarily fast, you gotta read up on those
23:52 rue_shop3 'm glad that in 1992 they had not given up on magnetic memory
23:52 rue_shop3 hey, oh , click
23:52 dumbass i wish they'd have given up on ccd memory
23:52 rue_shop3 harddrives prolly have some wickid fast amps in them
23:53 rue_shop3 ?
23:53 dumbass but very tiny voltage specs
23:53 rue_shop3 5V rail-rail?
23:53 dumbass less
23:53 rue_shop3 :(
23:53 rue_shop3 even old ones ya think
23:53 rue_shop3 10MB MFM seagate
23:53 rue_shop3 ?
23:53 dumbass microvolt inputs, 3.6 rail,
23:54 dumbass mfm may have 12v rails
23:54 rue_shop3 lets see what we can find!
23:54 dumbass i have a floppy here with a motor the size of a roll of toilet paper, but it's got dead slow chips on it
23:55 dumbass 10 inch floppies
23:55 dumbass IBM, with changer magazines
23:56 rue_shop3 I wonder what the bitrate on a 6.25" is
23:56 dumbass 170k bits
23:56 dumbass oh, the hdd, i dunno