#robotics Logs
Feb 02 2012
#robotics Calendar
00:34 dumbass .
01:35 theBear hmmm.... sounds like rif is gettin flooded
04:39 Tom_itx rue_mohr the buffers are so you can program devices down to 1.75v or so
09:01 rue_mohr ok isn't it a '244?
09:48 Tom_itx rue_mohr, no
09:48 Tom_itx it's a level translator
09:48 rue_mohr ooh
16:54 SolarNRT Hi guys, I'm trying to build an H bridge for my windscreen wiper motor. I want your thoughts on what I've done so far: http://imgur.com/akcjb http://imgur.com/ss7zL
16:57 Triffid_Hunter SolarNRT: got a schematic?
16:59 SolarNRT Yes sir: http://www.bobblick.com/techref/projects/hbridge/hb.gif
16:59 SolarNRT This is the circuit I'm trying to build
17:00 SolarNRT But I'm using TIP 2955's instead of TIP125s and I'm using TIP3055s instead of TIP120's and I'm using sn3904s instead of pn2222s. I haven't soldered any resistors on yet
17:00 SolarNRT Because I fear as I am using different parts, the resistances required may alter
17:01 SolarNRT Can you tell me what resistors from R1 through to R8 I should use instead and also is a 470uF capacitor also suitable
17:01 SolarNRT ?
17:01 Triffid_Hunter SolarNRT: yeah the 470u is bulk storage, use the biggest one you got with appropriate voltage. add some 10 to 100nF ceramics in parallel with it
17:01 Triffid_Hunter SolarNRT: the resistances come from the hFe of the transistors and your supply voltage
17:02 Triffid_Hunter SolarNRT: with darlingtons and extra drivers, only R1/R2 (the 47r ones) are important and they should work for most situations
17:02 Triffid_Hunter SolarNRT: make it as it is, see what happens
17:02 Triffid_Hunter SolarNRT: running from 12v? put a car tail-light in series with the supply, if there's a fault it'll stop your transistors catching fire
17:02 SolarNRT What does 47r mean, is that the same as 47 ohms?
17:02 Triffid_Hunter SolarNRT: yes
17:03 SolarNRT I'm using my PC power supply to drive the windscreen wiper motor
17:03 Triffid_Hunter SolarNRT: and fyi, 4R7 is a shortcut for 4.7 ohms
17:03 SolarNRT That provides 12v
17:03 SolarNRT How can I tell a 47r resistor? I have lots of resistors, do you know the striped colour code?
17:03 Triffid_Hunter SolarNRT: yep the bulb will light up when you run the motor, and it'll also light up if you have a short circuit. when you think the h-bridge is behaving properly, remove it and run direct to 12v
17:04 Triffid_Hunter SolarNRT: http://images.google.com/search?q=resistor%20color%20code
17:04 Triffid_Hunter take your pick ;)
17:05 SolarNRT 47r should be yellow pink black
17:05 SolarNRT thank you
17:05 SolarNRT catch fire?
17:05 SolarNRT Sounds bad
17:05 SolarNRT I've volt metered it
17:05 SolarNRT There are no short circuits
17:05 Triffid_Hunter pink? you mean purple?
17:06 SolarNRT I drilled holes into all the strips except the ones going to the bases of the big transistors
17:06 SolarNRT yellow magenta black then :)
17:06 Triffid_Hunter that works, I cut them with my box cutter (they're called X-acto in america i think)
17:08 SolarNRT I'll make the circuit,, what do I do if my kitchen goes bang or catches fire?
17:10 SolarNRT call the fire brigade, thanks for your help
17:21 Triffid_Hunter SolarNRT: yeah have a fire extinguisher with suitable material for electronics, ie CO2 or something
17:21 Triffid_Hunter or a bucket of sand
17:22 Triffid_Hunter SolarNRT: but if you're learning electronics, having things catch fire occasionally is simply part of the learning curve, best get used to the idea of it happening
17:22 Triffid_Hunter oh, and learn the lessons around that with cheap components rather than the expensive ones you get to later on ;)
17:50 SolarNRT I think using cheap components was the reason why apollo 13's motor driver blew up and thus blew up the oxygen tank?
17:56 dumbass 2955 and 3055 are not darlingtons, the gain is very difefrent
17:58 dumbass the Apollo 13 motor didn't blow
17:58 dumbass some *other* dumabss installed the wrong voltage heaters in the O2 tanks, which overheated, and overpressurised the tanks so they blew
18:00 dumbass same sorta error in specifying breathing lines which are almost explosive in pure O2, and then using pure O2 for a test with live humans
18:00 SolarNRT I reliably heard it was an IBM chip that caused it to blow from someone who used to work on the chips during the apollo program for Texas Instruments
18:01 SolarNRT I heard it was a shit motor driver that operated the fan thad too much current flowing through it and caused the chip to explode
18:01 dumbass or not clarifying 'm' for meters or miles, so the retros fired at miles up and were out of fuel by the time the spacecraft needed them, dooming it o crashing
18:01 dumbass stirring motor and heaters
18:01 dumbass not the chips tho
18:01 dumbass 48v vs 24v
18:01 SolarNRT I thought that it was an IBM chip that put too much current into the system and was the wrong chip to use
18:02 dumbass with the overvoltrage situation, the driver had no choice
18:04 dumbass the military/nasa/etc has always had famouly stupid errors, being they like to use non-standard power systems
18:04 dumbass 400hz vs 60hz, etc
18:05 SolarNRT From what I heard it was a cost cutting decision to use a cheaper IBM motor driver rather than the texas instruments chip they used on apollos 8-12
18:05 dumbass ok
18:05 SolarNRT Just what Delinah told me she was there, she worked for TI, she was at NASA from 67-72
18:05 SolarNRT She's now quite old
18:05 SolarNRT In a wheelchair
18:05 SolarNRT I don't doubt what she says
18:06 mbass is old now, in a wheelchair, and watched it lve o
18:06 dumbass your choice
18:07 dumbass from NASA itself:
18:07 SolarNRT Perhaps she's just a senile old pensioner who is claiming things that never happened
18:07 dumbass science.ksc.nasa.gov/history/apollo/apollo-13/apollo-13.htmlCached - Similar
18:07 dumbass You +1'd this publicly. Undo
18:07 dumbass Jun 29, 2001 – An explosion on board forced Apollo 13 to circle the moon without landing. ... 2 by using the electrical heater within the tank. .... included raising the permissible voltage to the heaters in the oxygen tanks from 28 to 65 volts DC.
18:07 dumbass from NASA itself:
18:07 dumbass nssdc.gsfc.nasa.gov/planetary/lunar/ap13acc.htmlCached - Similar
18:07 dumbass You +1'd this publicly. Undo
18:07 dumbass Nov 19, 2009 – The Apollo 13 malfunction was caused by an explosion and rupture of oxygen tank no. ... 1 oxygen tank, causing it to lose oxygen rapidly. ... All components were upgraded to accept 65 volts except the heater thermostatic ...
18:07 dumbass from NASA itself:
18:08 dumbass www.hq.nasa.gov/office/pao/History/apollo/apo13hist.htmlCached
18:08 dumbass You +1'd this publicly. Undo
18:08 dumbass Mission aborted after rupture of service module oxygen tank. ... controlled heating element, and two stirring fans driven by electric motors. ... to empty the tank, engineers decided to use its internal heaters to boil off the contents and applied ... the caution and warning system alerted the crew to low voltage on d.c. main bus B, ...
18:08 dumbass your choice
18:09 SolarNRT So when Schwigart was ordered to "stir the tanks" he flicked a switch, which sent a signal to a line driver, went to a phone line, went to another line driver in the service module, that line driver activated a motor driver, the motor driver sent in voltage into an electric fan within the oxygen tank that went BANG
18:09 SolarNRT That motor driver that made the oxygen tank go bang was an IBM chip, take my word for it
18:09 dumbass wasn't an instant bang
18:10 dumbass i don't care who made the parts, overvolting them from 24v to 65v was the problem
18:10 SolarNRT yes
18:10 SolarNRT too much voltage into the fan motor
18:10 orlok I did not know roland made milling/drilliung/3d scanning systems
18:11 dumbass remember, they didnt have pwm controlers, it was all relays, few transistors, and iron-powrder ring core memories in the "computers"
18:11 dumbass whatever the technology was, space travel then was as much as 20 yrs behind , to wait till it was proven and mature
18:12 dumbass changing anything inevitably screwed things up
18:12 SolarNRT I think that if we built apollo again it would be lighter thanks to advances in electronics and in material science
18:12 dumbass going to a higher voltage allowed smaller wiring, but you see it screwed things up for that mission
18:13 dumbass Apollo was going to be rebuilt twice, both times it was canceled for cost reasons
18:13 dumbass the most recent cancelation was by Obama 2 months(?) into office
18:14 SolarNRT I have a hunch that with advances in 3d printing, it may be possible to "print" another apollo rocket
18:14 SolarNRT Yes, constellation
18:14 dumbass and constallation was a chemical fueled versiojn of a nuke rocket
18:14 SolarNRT Nerva?
18:14 dumbass no, you are thinking of the russian rocket
18:15 Tom_itx you don't seem very dumbass to be speaking of such things
18:15 dumbass sorry
18:15 SolarNRT No the Russians' was N-1. Nerva was a US nuclear thermal rocket developed by rocketdyne in the US
18:15 SolarNRT I think his name is meant to be ironic
18:15 dumbass solar, the ruisssains and use collborated on that for a mars mission
18:16 dumbass "his" ?
18:16 SolarNRT her?
18:16 SolarNRT its
18:16 SolarNRT Sorry it surprises me that women use IRC, I'm not trying to be sexist or nothing.
18:17 dumbass i was thinking of the first Orion , the 2nd Oriion was apollo-like but chemical, and was changed to be constelation
18:17 SolarNRT I think the closest we may see is the Falcon heavy by spacex, which Musk wants to fly by this Xmas
18:17 dumbass constelation gew too big and was unstable, iffy, and pricey
18:18 orlok <$1000 milling machine
18:18 orlok !!!
18:19 SolarNRT What are your thoughts on 3d printers?
18:20 dumbass i would not build a rocket with them
18:20 orlok SolarNRT: cheap and fiddly and bad res, or very expensive
18:23 SolarNRT My thoughts are it all lies with stepper motors and enough step down gearing. The higher res you make it the longer it takes.... but perhaps with parallel printheads you could make faster high res
18:23 SolarNRT Also I think if you could 3d print in a vaccuum, you could print ANY material, not just sand, plastic, alumox and stainless
18:25 SolarNRT Do you agree?
18:27 dumbass no, i believe the repeated heating for each layer would damage the material, the difefrential heating would damage the strength, and the totoal effect would be a sintered mass and not a monolithic mass
18:28 SolarNRT What if you printed the most hi-temperature material first and gradually printed the less hi temp materials?
18:28 dumbass i offer as proof that somone did a solar glass printer, and the glass was always white, not clear, evidence of microfractuing in the glass
18:28 SolarNRT Markus Kayser
18:28 SolarNRT His solar 3d printer fascinated me
18:29 dumbass also, the energy needed to vaporise and deposit steel would be enourmous
18:29 SolarNRT Took all day to make 2 objects
18:29 dumbass your choice
18:29 SolarNRT Stainless printing worked by dropping sstainless dust then lasering layer by layer
18:30 SolarNRT Do you think that vapour deposition would be superior in strength than to fusing powders with laser/concentrated sunlight?
18:30 dumbass like i said, i believe the powder process leads to sintering, which is weeak and porus
18:31 Triffid_Hunter SolarNRT: there's a point beyond which more precision in the motors gives no advantage, and just makes it harder to generate step pulses fast enough
18:31 orlok theres companies that do that, and then use capillary action and another molten metal to infill the holes
18:32 dumbass orlok, ever weld up something with 7018 rod, and then go over it with 6013 or 6011? or brazing rod?
18:33 SolarNRT I get someone else to do my welding for me
18:33 dumbass you can get a pretty surface, but it's only as strong as the original 7018, the infilling of 6011/13/brass does nothing
18:34 SolarNRT Just makes it heavier I should imagine
18:35 SolarNRT How about if you had stepper motor gearing accurate enough to deposit 1:2000 maginification and you could use put tiny molten blobs into place?
18:36 SolarNRT I mean micromachining has come a long way
18:36 dumbass go for it, let us know how it works out
18:38 SolarNRT I think I can do the gearing, not a problem. How do I engineer a heated titanium carbide syringe that can stay hot enough to have molten steel, not get clogged up, not burn and have a tiny valve that can open up and close?
18:38 dumbass i expect you cannot, think of wire feed welding
18:38 SolarNRT Like on the pipelines?
18:39 dumbass umm, yeas, you can use wirefeed on pipelines
18:39 dumbass most welders using it have not ever touched a pipeline tho
18:40 dumbass i don't care for wirefeed, i bought a wf welder, and i made a wf welder, i might make another one somday
18:41 dumbass iirc, rue has a wirefeed
18:41 SolarNRT OK so you have a reel of 2micrometer steel, that would be soooo delicate, any jolts and the reel might snap
18:41 dumbass you might consider a tig welder too, but they are splatery
18:41 SolarNRT splatery?
18:41 SolarNRT I heard about tig, tungsten inert gas
18:41 dumbass splat-ery
18:41 SolarNRT As in the user gets splatted?
18:42 dumbass messy
18:42 dumbass throws aux weld debris all over
18:42 dumbass needs significant cleanup or sheilding
18:42 dumbass worse than 6011/13
18:43 dumbass you need to do more research into making and placing moten metals
18:43 dumbass molten
18:49 dumbass building up broken tools, filling holes or cracks, or drill holes, is often done with plain welding, its a natural way to do metal deposition, but it's very very hot, energy dense
18:50 dumbass while there's tons of inefficencies in old growlboxes, mine needs a 40amp breaker to do heavy welding, 30amp @ 240vac for welding at 60amp-90amp setting
18:51 dumbass praps you can see problems in keeping up that heat input to the printer head
18:52 SolarNRT That's 7.2kw to 22kw of power!
18:52 dumbass while a lot of the metal is deposited off the rod/wire in drops, there's a lot of plasma generated too
18:52 SolarNRT I've heard with welding you're changing the tips regularly
18:52 dumbass i stick weld exclusively, i don't do tig or wirefeed
18:53 dumbass i would like a reliable wirefeed for under 30amps
18:53 SolarNRT is stick like arcwelding?
18:53 dumbass but i don't have one
18:53 dumbass you need to do more research into making and placing molten metals : stick IS arc welding
18:54 SolarNRT So the dude who stuck my shafts on my gears for me was using arc welding, lots of blue sparks very bright
18:54 SolarNRT and these kkkka kkka noises
18:54 dumbass btw, if you want to print aluminum for machineing later, do NOT use tig
18:54 SolarNRT Why not?
18:55 dumbass it deposits tungsten in the aluminum, you break bits off when machining
18:56 SolarNRT Shall I just stick to something simple like making clay moulds, grinding up bean cans into the clay moulds then superheating it with concentrated light energy and insulating the mould with pvc coated rockwool. Would that work? You seem to know your metallurgy
18:56 SolarNRT ??
18:57 orlok why insulate the clay?
18:57 orlok and beancans?
18:57 SolarNRT cheap
18:57 SolarNRT bean cans go in one way
18:57 SolarNRT aluminium gears come out the other
18:57 dumbass scrap steel can be 10 cents a pouind
18:57 SolarNRT I sell them on ebay
18:58 SolarNRT I get rich out of using the sun, clay moulds and people's trash!
18:58 dumbass cans have a terrific surface area per pound, keepiong them from oxidising right away could be problem atic
18:58 SolarNRT can you not smelt oxidized aluminium,?
18:59 dumbass look up the melt of AlO
18:59 dumbass it's much higher
18:59 SolarNRT shit, that's like 2000 degrees
18:59 SolarNRT I thought aluminium was only 660
18:59 dumbass you will be wasting energy to allow it to oxidise and then melt that
19:00 dumbass it's slso very hard, think carborundum a trade name
19:00 SolarNRT is alo heavy?
19:00 dumbass no
19:01 SolarNRT I don't think a clay mould could handle the temp! one tiny air bubble and smash then really hot aluminium sprays in my face
19:01 dumbass this conversation is why expereince is hard to get, good to have, and puzzeling when disregarded (so people feel like they are dumbasses)
19:02 dumbass keep your face away from all molten metals
19:02 dumbass look up "shield"
19:02 SolarNRT Yeah, they are not expensive either
19:03 dumbass i would not spare money to keep molten metals out of my face
19:03 SolarNRT Do you know anything about aluminium lithium 2.45 Li, 0.12 Zr, 1.3 Cu, 0.95 Mg, bal Al
19:03 dumbass no
19:04 SolarNRT Do you know a way you can get the oxide out of aluminium,?
19:04 dumbass only way i know of on a large scale is melting
19:06 SolarNRT Is it possible to make a ceramic tap plug so I can put the bean cans into the mould first, stick a vaccuum cleaner on the hole, then tighten the plug after?
19:08 dumbass i do not understand the question, but i would not trust a two-piece mold you expect to be over 2000F
19:08 SolarNRT OK what if I'm only going up to 700 degres?
19:09 dumbass do more research
19:09 SolarNRT Any ideas how I can make a clay mould airtight?
19:09 dumbass there's various methinds for putting materials in molds, pick the method that you like
19:09 SolarNRT I've got air clay
19:09 dumbass if you make it airtight, it will explode
19:10 dumbass why do you want it airtight?
19:10 SolarNRT To take the air out so I can superheat metals in a vaccuum so that no oxidation occurs
19:10 dumbass crap
19:10 dumbass do more research
19:10 dumbass do more research
19:10 dumbass do more research
19:10 dumbass do more research
19:10 dumbass do more research
19:10 dumbass do more research
19:10 LoRez don't repeat.
19:10 dumbass look up "flux" in the context of melting metals
19:11 SolarNRT OK, I'm thick when it comes to metallurgy and I can see you've had A LOT of experience, probably given yourself metal burns inifinitley more times than I have. But I value your experience and I like to learn
19:11 dumbass look up "stick welding", "wirefeed welding shielding gas"
19:11 dumbass i prefer to not get burned
19:12 SolarNRT Same here
19:12 dumbass but i have melted 100's of lbs of steel rod
19:12 SolarNRT Ever worked with tantalum? I've got some discs, but they don't melt until like 3000
19:13 dumbass tant is pricey, and fairly rare
19:13 dumbass not much in capacitors
19:13 SolarNRT It took me a weeks trek and I had to pay this guy 90 quid for a handful of tantalum. I've still got the discs
19:13 SolarNRT I thought it may come in handy one day when I was ready to use it for something hi temp
19:14 SolarNRT I'll send you a pic
19:14 SolarNRT brb
19:14 SolarNRT +
19:14 dumbass no need
19:19 SolarNRT http://imgur.com/khr3i The small discs at the top are tantalum, why the strange colours? The bottom right is niobium, the bottom left is hafnium
19:19 SolarNRT Took me two weeks and all my money last summer just to get all that
19:19 SolarNRT I went round the whole UK following leads off the internet
19:20 SolarNRT All three have very high melting points. I thought that they might be handy for making a high-temp mould with solar energy
19:20 SolarNRT But I don't know how to weld them together, do you?
19:22 dumbass http://en.wikipedia.org/wiki/Electron_beam_melting
19:22 rue_mohr I need to etch a tank today
19:22 rue_mohr no
19:23 rue_mohr I need to etch a circuit baord today
19:23 rue_mohr yea
19:24 SolarNRT :o this is it, this is micro 3d printing
19:24 SolarNRT You've found the holy grail
19:24 dumbass so send me a check
19:24 SolarNRT sure what's ur address?
19:24 rue_mohr 192.168.9.12
19:25 dumbass aikatt in paypal
19:25 SolarNRT lol
19:28 dumbass i should prolly change that to dumbass too
19:31 SolarNRT :o I just saw the youtube video
19:31 SolarNRT If you had a big enough elecron beam melter you could mass produce sr71 blackbirds!
19:31 SolarNRT They used a titanium honeycomb in their engines
19:31 SolarNRT http://www.youtube.com/watch?v=A4lm_CgISnA
19:32 SolarNRT And the bonds are stronger because your using magnetized electron beams instead of light energy
19:32 dumbass you cannot magnetize an electon beam, electons are not magnetic in themselves
19:33 SolarNRT You're right, you can use big magnets to direct the electrom stream
19:33 dumbass magnets are slow tho
19:33 SolarNRT Can I build my own one out of an old TV that's sitting on the lawn?
19:34 dumbass i doubt you can, rue could tho
19:34 SolarNRT Are there any schematics?
19:34 SolarNRT Or is this tech classified?
19:35 SolarNRT It seems like a very new technology
19:35 dumbass enter search terms into lmgtfy.com
19:35 dumbass electon beams are not new, the first beam accelerators were all electrons, iirc
19:36 dumbass electon beam damage by inadvertant high energy has been around since the 40's
19:36 dumbass i have a TWT tube colletor that'
19:36 dumbass s like 20lbs of solid copper
19:38 SolarNRT Is it a bit like a really powerful TV?
19:38 SolarNRT That fires an electron beam
19:38 dumbass you ever hear of google?
19:39 SolarNRT I see I'm asking questions here that are beyond the remit of your knowledge
19:39 SolarNRT Thanks for your input tonight, it's been really helpful
19:39 dumbass i didn't say that
19:40 dumbass i will say that your learning should not be limited in time to when i am available to talk to you
19:40 SolarNRT I can't seem to find a blueprint anywhere on google for said machine
19:41 SolarNRT I see an outer shell of one on youtube, I see some forums talking about the future, I don't see anything that tells me how to actually make one
19:41 dumbass you prolly cannot find one for a vga card either
19:42 dumbass which machine do you need a schematic for?
19:42 SolarNRT an electron beam melting machine
19:42 rue_mohr see how i sit here and be quiet
19:42 dumbass no
19:42 SolarNRT This is soooo much better than markus kayser's solar 3d printer I was thinking of building
19:42 rue_mohr did you tell him about evanuating it?
19:42 dumbass no
19:43 rue_mohr :)
19:43 SolarNRT Yeah, why isn't there a circuit diagram for a vga card?
19:43 dumbass trade secrets
19:44 rue_mohr even when vga started, they used fpga's
19:44 dumbass look up things which have electon guns in them: free electon lasers, TWT's, Klystrons, Magnetrons, linear accelerators, etc
19:44 rue_mohr I was gonna make a magnetron
19:44 SolarNRT OK, the answer to my question then probably lies in the backtrack forums on "How do I hack into a company's tech departments mainframe that knows how to build said machine"?
19:44 mbass hads rue one of the 20 she
19:44 rue_mohr I didn't get past drawing lots of plans
19:45 SolarNRT Well I built a skydish that follows the sun and I youtubed it
19:45 SolarNRT I feel that there's nothing I can't do now if I put my mind to it
19:45 rue_mohr I think the only way I'm not gonna fall asleep is if I stay up
19:45 dumbass really?
19:48 SolarNRT I'm off to bed
19:48 SolarNRT You're right about trade secrets
19:48 SolarNRT It would be nice to make these wonderful machines
19:48 SolarNRT But the companies that know how to make it, aren't going to open-source billion dollar research, are they?
19:48 SolarNRT This is reality
19:49 SolarNRT Maybe I'll just make a plastic reel 3d printer, like a makerbot
19:49 SolarNRT Thank you for your time everybody
19:49 SolarNRT And goodnight
19:58 dumbass maybe what he needs is a hybrid plasma gun / wirefeeder
19:58 dumbass it would be very messy, but cheap
19:59 dumbass might be hard to make work right
21:50 dumbass ...
22:15 rue_mohr I have a book with an ion ray gun
22:15 rue_mohr somewhere
22:15 rue_mohr make someone hair stand on end from across the room they claim
22:15 Tom_itx workin on a new batch of programmers tonight
22:16 rue_mohr cool
22:16 Tom_itx programming phase
22:16 rue_mohr I should finish some software for the temp controller and put togethor the new oven
22:16 Tom_itx got my batch of boards from itead
22:17 rue_mohr Ithink I worked out how to make a 7 bit pwm state machine
22:31 Tom_itx 15 / 15 programmed
22:32 rue_mohr one of the cats is missing
22:33 rue_mohr I suspect if he dosn't show up by morning he's dead
22:33 mbass congrats Tom with a pat on the back and offers to share a saucer of Bai
22:33 Tom_itx roadkill?
22:33 dumbass <cough>
22:33 rue_mohr checked the road, nothing
22:38 e_mohr gives his mouse a ball-no
22:42 theBear ouch
22:43 dumbass ok, so Data is at the top of a 200ft cliff, says he can transit to the bottom of the cliff, jumps off the cliff, breaks apart into 100 pieces on impact, and the pieces announce he did make it to the bottom, is it still Data?
22:44 rue_mohr yea...
22:47 dumbass ok, so Yar is laying on the table in surgery, apparently brain dead, and the doctor starts at 20uv "direct neural stimulation", woth no results, so increments the voltage 5uv every 2 seconds, for 55,000 hours, is it still Yar?
22:48 theBear whats yar ?
22:49 dumbass well, after 6 years of being shocked byt he doc, ending at 500volts, Yar isn't much
22:49 dumbass Yar was head of secuirity on Star Trek
22:49 dumbass NG
22:51 rue_mohr how should I process this ihex line on a microcontroller, I need to verify the line checksum before I 'execute' it
22:52 rue_mohr means a buffer for sure
22:54 dumbass computer O.S.: Mint 10
22:54 rue_mohr maybe I should amke radiobeacon cat collars
22:54 dumbass what's that?
22:54 rue_mohr for finding them
22:54 dumbass computer O.S.: Mint 10
22:54 rue_mohr http://eds.dyndns.org/~ircjunk/circuits/car-locator.jpg
22:56 dumbass Linux Mint 10 features the following upstream components: Ubuntu 10.10, Linux 2.6.35, Gnome 2.32, Xorg 7.5.
22:57 dumbass hmmm, well it was $16, i'll just put a winxp boot drive into it
23:02 Kimlaroux and Ubuntu features Debian as upstream component
23:10 rue_mohr ubuntu IS debian, its just a hacked debian
23:22 dumbass .
23:22 Kimlaroux it's a totalitarian debian =P
23:22 rue_mohr http://eds.dyndns.org/~ircjunk/circuits/car-locator.jpg <-- what freq you think that runs at?
23:23 rue_mohr about
23:23 rue_mohr it looks wide
23:23 rue_mohr but the cap and inductor are pretty big, I'm thinking its low
23:23 Tom_itx yay! all done
23:23 rue_mohr 1000x gain...
23:24 rue_mohr hahah yo an still get lm555 in anything, but lm741 is obsolete
23:25 dumbass 500uih and 400pf = 1mhz
23:25 rue_mohr ooo that IS low
23:26 Tom_itx these are cheaper too
23:26 Tom_itx saved on different parts and cheaper boards this time
23:27 dumbass 20pf 500uh = 1.7Mhz
23:27 rue_mohr you should stilk screeen 'made in usa' on them
23:27 Tom_itx why?
23:27 rue_mohr oo thats a lot narrower than I thoguht
23:27 rue_mohr cause it gives you a lead on the ones out of china
23:27 dumbass you can get much wider range osc now
23:28 Tom_itx what html gives strikethru txt?
23:28 rue_mohr <strike>
23:28 rue_mohr ?
23:29 dumbass 1800uh 400pf = 8khz
23:30 rue_mohr (8-O for 58c you can get a 10Mhz opamp in a sot23 package....
23:31 dumbass <strike style='color:red'> <span style='color:black'>black with red strikethrough<span> </strike>
23:31 rue_mohr "UA741" now
23:31 rue_mohr 56c ea
23:33 dumbass UA is just the oem name
23:33 dumbass like LM = linean motorola
23:33 dumbass or F = farchild
23:33 dumbass linear
23:33 rue_mohr !! oh
23:33 rue_mohr THAT I didn't know...
23:33 mbass looks at
23:33 rue_mohr linean? linear?
23:33 rue_mohr no I didn't!
23:34 Tom_itx rue_mohr
23:34 Tom_itx http://tom-itx.dyndns.org:81/~webpage/commerce/commerce_index.php
23:34 rue_mohr lm = linear module
23:34 e_mohr sh
23:34 Tom_itx does that look confusing?
23:34 rue_mohr nope
23:34 dumbass Motorola, like DM = digital, Motorola
23:34 m_itx hangs a shingle out f
23:35 e_mohr picks up a random
23:35 rue_mohr "atmega" who is that?
23:35 rue_mohr :)
23:35 Tom_itx xmega are nearly cheaper
23:35 Tom_itx and do much more
23:35 Tom_itx but are 3.3v
23:35 rue_mohr I do not want 16 bit
23:36 Tom_itx they are not 16 bit
23:36 rue_mohr yea, 5V throughhole for me thanks
23:36 m_itx waits patie
23:36 rue_mohr do you have dk pn's for cheap smt leds?
23:36 Tom_itx yes
23:36 rue_mohr lay it on me!
23:37 Tom_itx bi color?
23:37 Tom_itx single color?
23:37 rue_mohr single
23:37 rue_mohr any colour and I'll find the series
23:37 Tom_itx .08
23:37 Tom_itx ?
23:37 dumbass cannot ask Tiggr
23:37 rue_mohr whatever
23:37 Tom_L LTST-C190CKT
23:37 Tom_L 160-1181-1-ND
23:37 Tom_itx same
23:38 Tom_L 160-1452-1-ND
23:38 Tom_itx bicolor
23:38 rue_mohr ok
23:38 Tom_L 859-LTST-C195KGJRKT
23:38 rue_mohr Lite-on
23:38 Tom_itx same
23:38 Tom_itx i think so
23:38 Tom_itx mouser is cheaper
23:38 rue_mohr 56c ea!
23:38 e_mohr grum
23:38 Tom_itx ?
23:38 rue_mohr ah, 10 drops to .39
23:38 Tom_itx which ones?
23:39 rue_mohr http://search.digikey.com/ca/en/products/LTST-C190CKT/160-1181-1-ND/269253
23:39 Tom_itx damn, when i got em i paid .08 ea
23:39 rue_mohr special canada rate
23:39 Tom_L http://www.mouser.com/ProductDetail/Lite-On/LTST-C190CKT/?qs=S9W2%252blcD1RzAClymKdYNEA%3d%3d
23:39 dumbass prices got horrible the last few yrs
23:40 Tom_itx still .08 for 100
23:40 rue_mohr mouser costs $50 per package @ border
23:40 dumbass another reason i am pissed i cannot live in my Alabama house, there's just no way to replace it $ for $
23:40 Tom_itx yeah but i don't charge $50
23:40 rue_mohr yea go the long way aournd..
23:40 Tom_itx rue_mohr i use those on the programmer
23:41 Tom_itx to give you an idea of size
23:41 Tom_itx iirc they are 0402
23:41 Tom_itx http://tom-itx.dyndns.org:81/~webpage/commerce/USBTinyMkII_1-1c_top.jpg
23:41 Tom_itx just below the slide switch
23:41 Tom_itx and left
23:42 Tom_itx the other one is bicolor
23:42 Tom_itx gnite
23:43 rue_mohr green is the cheapest
23:43 Tom_itx i wanted red
23:44 Tom_itx what about all those side emitting white ones i sent you
23:44 rue_mohr this is for a colour 'how close is your cat' graph
23:44 rue_mohr red/yellow/green
23:51 mbass is still boggling that she is finally seeing ST-NG shows from 1987 that she never saw be
23:52 dumbass i have seen only a couple ST-Voy shows, and was on tv for 6 years
23:54 dumbass wait, there was a 4 yr run of pre-original series prequel series?