#garfield Logs

Mar 20 2015

01:12 tsmeow-afk slaps
01:12 katsmeow-afk better?
01:13 rue_house just eating supper
01:13 rue_house then back to bed
01:13 katsmeow-afk oh
01:14 katsmeow-afk iwas winding down, listening to some surprisingly peaceful Deep Purple
01:14 katsmeow-afk hoping zhanx is ok
01:15 rue_house ok?
01:16 katsmeow-afk well, he said lifehas not been good as a civilian
01:18 rue_house I dont tthink he'd do anything stupid
01:18 katsmeow-afk "stupid" is relative tho
01:44 katsmeow-afk > Navigation & Maneuvering > Aids to Navigation > Intercoastal Waterway
01:44 katsmeow-afk Aids to Navigation
01:44 katsmeow-afk Intrercoastal Waterway
01:44 katsmeow-afk For the sea buoys that delineate channels off the coast of the United States, and for the Intracoastal Waterway (ICW),
01:45 katsmeow-afk i gotta wonder if these peole have a cluewhenthey don't know whatICW stands for, and cannot spell it the same way 3 times in a row
09:37 rue_house katsmeow-afk, in the datasheet for the LM117 there is an app note for a 5A power supply
09:45 katsmeow-afk paralleling the regulators is an old trick, but you have a lot of Vdrop
09:46 katsmeow-afk LMx17 and 78xx regulators need (usually) 2.5 volts to throw away in order to run, not very efficient
09:46 katsmeow-afk you also lose the short circuit shutdown when you float the sense pin off gnd
09:48 katsmeow-afk and it's iffy using them above 30v anyhow
09:50 katsmeow-afk there'as a scheme for a booster in some data sheets, using the 78xx 's *input* to pull down on a pnp's base, tying the pnp's collector to the78xx's output
09:51 katsmeow-afk if done right, you can tweak a resistor to set the overcurrent shutdown, but it's not accurate over temperature range
09:52 katsmeow-afk but yeas, again with excessive Vdrop, you canget massive current using pnp boosters, or just putting the regulators in parallel
09:54 katsmeow-afk if you lok at the fnctional diagram of what's in a 78xx regulator, it's an opamp and a transistor, if you have an opamp and a transistor, you can build one and include the pnp in the design
09:54 katsmeow-afk the only big change in the olde 78xx and the newer low-drop regulators is the pnp pass transistor instead of the npn
09:55 katsmeow-afk there's more gnd sense pin current in some
09:56 katsmeow-afk i still say for a 48v supply, those +/- 50v (or 80v or 100v) audio power modules , with short circuit protection and mute, seem like a good option
09:58 katsmeow-afk use a 100v module, a +60v and a -10v, fake a gnd at +20, and limit the output swing from +48v to 0v
10:00 katsmeow-afk what can i do with large dead 12v car/marine batteries?
10:17 katsmeow-afk btw, doing the pnp booster with a 78xx is a lot like a szilakai circuit
19:42 katsmeow-afk -----------------
19:42 katsmeow-afk New listing New 1/4" Metal Train Truck Air Horn Electric Solenoid Valve Heavy Duty 12V
19:42 katsmeow-afk $0.99
19:42 katsmeow-afk 0 bids
19:42 katsmeow-afk +$6.99 shipping
19:42 katsmeow-afk Watch
19:42 katsmeow-afk Ended (Tomorrow, 9PM)
19:43 katsmeow-afk From Hong Kong
19:43 katsmeow-afk -----------------
19:43 katsmeow-afk new listing! no bids! Ended tomorrow!
19:59 katsmeow-afk thatidea works better and better: if all timer functions are in a fifo on one cpu, and the command can be "go into the space of cpu15 and set %cow45.age to %cow45.age + 1" , then all such timers can be offloaded from the main program
20:01 katsmeow-afk if cpu67 can be booted to "i/o" and pointed to cpu23.var78, then cpu23 doesn't need to deal witht he i/o of it's var78, AND var78 doesn't need to be copied to anywhere
20:03 rue_house the main converter isn't a problem, the voltage/current limiting is
20:03 katsmeow-afk a string exec(what) can send the string to cpu56, which maps itself into the existing varspace, or not, and var56 deals with the compiling and running of eval(what), while the prgram cpu keeps running theoriginal program, or not
20:04 katsmeow-afk except for the timer functions, this is an idea i had in the early 1990's :-/
20:04 katsmeow-afk and no programming language that i know of can do it yet
20:14 katsmeow-afk It's hard to find good numbers on how much force it takes to tear off a person's arm.[1]
20:20 rue_house I think it would depend heavily ont he person
20:21 tsmeow-afk ag
20:21 rue_house and if they are resisting or not
20:21 katsmeow-afk somewhat, yeas
20:21 rue_house http://s26.postimg.org/i6mwprh8p/alimentation_labo_2.jpg
20:21 rue_house that bottom amp
20:21 rue_house its a type of noninverting transimpedence amp, I think
20:21 rue_house (d)
20:23 rue_house the current thru P must equal Uref/R
20:23 katsmeow-afk if you redraw it so parts are laid out conventially/modernly, i think you'll find it's just a unconventional way to low-pass the driving signal provided by P
20:24 rue_house Uref is a votlage source
20:24 katsmeow-afk oh, wait, they are using "U" as "v", and that's a cell, not a capactior
20:24 rue_house (damn french)
20:24 katsmeow-afk wierd
20:25 rue_house i been trying to bend my head around it because I'v not seen it done before
20:25 katsmeow-afk what's it good for?
20:25 rue_house well, b is an improvment on a,
20:26 rue_house c seem to improve b
20:26 rue_house so I deduce that d is an improvement of c
20:26 rue_house tho, I'm not so sure any of them are improvements
20:27 rue_house I can see how d might react better
20:27 rue_house as its parts are more related to the load
20:27 rue_house (tho i see problems around 0V)
20:28 rue_house I think I'm gonna sleep
20:29 katsmeow-afk i wish you'd find a cure for that
20:29 rue_house yea
20:29 katsmeow-afk a simple on-off sleep switch would be best, with a timer
20:30 rue_house ya
20:32 rue_house yesterday I slept till 10
20:32 tsmeow-afk remem
20:33 katsmeow-afk i was worn out today from working yesterday, that's myexcuse
20:33 katsmeow-afk soon as i got ready to go grocery shopping 3x today, all 3x it began raining
20:35 rue_house I found a good way to draw it
20:36 rue_house op-amp, - on top
20:36 rue_house output over top to - input
20:36 katsmeow-afk - is usually drawn on bottom
20:36 rue_house output spaced right a bit with RL on it
20:37 rue_house divider left of RL consisting of current-source on top, and variable resistor on the bottom
20:37 rue_house divider middle to + input
20:38 rue_house so, the current source is just ref'd off the output voltage, and the variable resistor sets a voltage on the + input
20:39 rue_house the advantage, I guess, is that because RL is part of the current path, everything responds a bit faster
20:41 katsmeow-afk people have built audio amplifiers that do the same thing, as current sources, not voltage sources,,but you can do that with any ole audio amp and one resistor
20:42 rue_house there was once a base amp I was set to repair, they had some kinda split rail power supply where the speaker + went direct to the + rail and the speaker - went direct to the -
20:42 rue_house power rail
20:42 rue_house I never really worked out how that damn thing worked
20:43 katsmeow-afk prolly really well, for burning up speakers
20:43 rue_house no it was fine, but I dont know what the principal was
20:44 katsmeow-afk err, prolly human
20:44 rue_house have anyhting good on the MJ4502?
20:44 katsmeow-afk how can an audio amp work if you hood the speaker to the +45vdc and the -45vdc ??
20:45 rue_house different supplies
20:45 katsmeow-afk it's an ancient transistor
20:45 rue_house and you modulate how the supplies are linked
20:45 rue_house ancient eh?
20:45 rue_house must take atleast 4A
20:46 katsmeow-afk if the + is always + and the - is always -, then you can't get to 1/2 the signal thatis -/+ vs +/-
20:46 rue_house like I say, I dont know how it worked
20:46 rue_house that said, it needed a new speaker and it was good
20:47 rue_house I think someone just plain overdrove it
20:47 rue_house the new speaker for it was like $150
20:49 katsmeow-afk http://i.imgur.com/4EXLpYj.png
20:51 rue_house never heard of that one
20:52 rue_house http://www.atmo.arizona.edu/students/courselinks/spring08/atmo336s1/courses/spring15/atmo589/ATMO489_online/lecture_7/lect7_conductivity_meter.html
20:52 rue_house ooo
20:54 katsmeow-afk yeas, some very sensitive fets are used to make proximitydetectors based on ion disturbance in the air
20:55 katsmeow-afk not all that reliable, but some are good up to 20ft away, majorly depending on the wind
20:57 katsmeow-afk just exhaling upwind of it would trigger it
21:25 katsmeow-afk http://static.fjcdn.com/pictures/Blank_1aadbd_5374455.jpg
21:50 rue_house hmm fingers linked at the knuckles eh?
21:51 katsmeow-afk i wonder about the stationary thumb at the bottom of the hand
21:59 Tom_itx sumatra doesn't allow editing pdf
22:04 rue_house http://www.wallpaperhi.com/thumbnails/detail/20130227/star%20wars%20droid%20battles%201920x1200%20wallpaper_www.wallpaperhi.com_75.jpg
22:08 katsmeow-afk need engineering drawings, rue
22:11 katsmeow-afk http://www.deviantart.com/morelikethis/artists/340509494?view_mode=2
22:16 katsmeow-afk http://starwars.wikia.com/wiki/Special:Search?search=droids&fulltext=Search
22:18 katsmeow-afk wooo, that poor dope put up another auction for sterio reamp/tone module with NE5532 again, the guy i got one from for $2.26 free s&h
22:18 katsmeow-afk cannot get the pcb for $2.26
22:18 katsmeow-afk cannot get the 4 sterio pots for $2.26
22:19 katsmeow-afk the s&h from China is prolly $2.26 too
22:36 katsmeow-afk http://www.thinkartificial.org/
22:41 katsmeow-afk http://www.thinkartificial.org/artificialcreativity/original-thoughts-intro/
22:46 katsmeow-afk <quote>
22:46 katsmeow-afk If people like Kevin Kelley and Kurzweil are correct, however, a single computing device matching the power of the human brain will cost $1k in 2019. And the internet in the year 2040 will have processing power that matches all 7 billion human brains on Earth.
22:46 katsmeow-afk Now we wait.
22:46 katsmeow-afk </quote>
22:59 katsmeow-afk and in 2041 there will be very few humans on Earth
23:01 katsmeow-afk how to get rid of the humans on Earth: tell the Ai that humans are responsible for the mess simply because there's too many of them
23:11 rue_house if you had to reduce the number of joints in a foot, how many would you leave it with?
23:14 katsmeow-afk about what it has now, because i woldn't use a ball joint for the ankle, but i wold eliminatehalf the major toe joints
23:15 katsmeow-afk by eliminating half the joints, like all those that connect tothe ankle, or under it, you can lower the ankle down deep into the foot
23:16 katsmeow-afk on the other paw, it makes some sense to use hands for the feet
23:16 katsmeow-afk if youuse hands, you get dexterity and a common appendage
23:17 katsmeow-afk no more typing on only one keybd, or typing and not being able to solder
23:17 katsmeow-afk or fixingbreakfast while washing dishes at the same time
23:18 katsmeow-afk it gets back to my question: why emulate the human completely? why restrict yourself? design out the humans' built-in restrictions
23:19 katsmeow-afk the movie Mission to Mars had a very capable doggie, other than it had a built-in human-mode combat program
23:20 katsmeow-afk put dexterous hands in place of it's paws, add another pair of identical limbs at midchassis
23:21 rue_house I'd rather type with two extra arms than with my feet :)
23:21 katsmeow-afk yeas
23:21 katsmeow-afk you need one pair to stand on or maintan balance, or make noisesto worrythe cat
23:21 rue_house I'm pretty sure I could handle two extra arms
23:22 rue_house three to carry stuff and one to open the damn doors with
23:22 katsmeow-afk open the door with one of the "feet" ?
23:23 rue_house dont know how many times this week I'v had the option to put something down in a puddle or mud so I can open the door to put it back in the van
23:23 katsmeow-afk remember, tothe robot, with 6 "arms" and 6"hands", any set of them can be used as "feet" at any time
23:24 katsmeow-afk ya just don't see any decent 6-handed robots around
23:25 katsmeow-afk no, wrong movie
23:26 rue_house hmm
23:27 rue_house ifny_, I should say hello while your here
23:27 rue_house "here"
23:27 rue_house hmm, well its cold and raining
23:27 rue_house I'm in my pajamas
23:28 rue_house if I dare go to the shop, its nice and cozy and warm
23:28 rue_house katsmeow-afk, if I'm about to fall asleep right after work, remind me of the existance of tea please
23:28 rue_house I forget you know
23:28 rue_house "I have a good memory, it just dosn't last long"
23:29 katsmeow-afk tea: it's a stimulant, especially hot, and poured into the lap while sitting
23:29 rue_house hah
23:30 rue_house it does keep me up, the caffeen or having to take a leak every 15 mins, not sure.
23:33 katsmeow-afk why can't i remember th ename of that movie???
23:33 katsmeow-afk damned dysnomia!
23:36 katsmeow-afk i have it on vhs, which means it's upstairs, so i won't be getting it tonite
23:48 rue_shop3 prove your kat! tell me 3 transistor part numbers for PNP transistors that start with TIP
23:48 rue_shop3 !
23:48 katsmeow-afk prove my kat?
23:49 katsmeow-afk tip 30 , 36 , 42
23:50 rue_shop3 :) thanks!
23:50 katsmeow-afk 135 , 145 , 125
23:50 katsmeow-afk 147 , 2955 , ummmm,, ok, i got 3
23:50 rue_shop3 I have a lot of tip32
23:51 rue_shop3 hmm LM318 in a video amp circuit, wonder if they are good
23:53 katsmeow-afk Red Planet (2000)
23:53 katsmeow-afk AMEE (Autonomous Mapping Exploration and Evasion)
23:53 katsmeow-afk This unsuccessful science fiction thriller film followed a small, six-person team of astronauts on an investigative rescue operation to the red planet of Mars in the year 2045, led by pretty Commander Kate Bowman (Carrie-Anne Moss). Their mission was to investigate further terraforming of Mars for future human colonization.
23:53 katsmeow-afk During a solar flare incident and subsequent shipwreck on the planet, a multi-purpose, unspeaking quadripedal (crouching) or bipedal (7 foot tall) robot named AMEE, an ex-military android (completely CGI-created) designed for mapping and exploration of the Martian surface, was damaged in the crash and reverted to its original programming as a hunter/killer.
23:53 katsmeow-afk The android stalked the crew members with its infra-red and X-ray vision. The metallic, skeletal monkey-like AMEE had four limb appendages with joints that swiveled, turned, pivoted, and spun around, and clawlike 'fingers'.
23:54 rue_shop3 ah yes, AMEE, I remeber went a little crazy
23:55 rue_shop3 got its power supply harvested
23:55 katsmeow-afk yeas
23:58 katsmeow-afk great, locked up Ff aff'inggain
23:59 rue_shop3 even in mid 80's boards, its hard to find things desgined with power PNP's
23:59 katsmeow-afk yeas, like p-chan fets, they had issues