#robotics Logs
Feb 23 2014
#robotics Calendar
13:12 GuShH_ possibly because there's no shoulder so to speak, less risk of crash I guess. you could cut the relief inside and use your ears to stop in fact, but I just stop at roughly the depth I want and that's it
13:13 GuShH_ after two failed attempts (not specifically thread related failures, mostly dimensioning errors from my side on the other operations) here's what I take from it... cut your male first down to spec, then cut your inside thread if you don't have a tap, if you do have a tap, cut the female first. always start with your most reliable and easy to check process!
13:14 GuShH_ ie. cut to fit, I find it takes me less fiddling around if I do it like that, instead of constantly stopping to measure with calipers.
13:15 GuShH_ bleh, one more part and one last operation and I'm done with this project, at least the pressure vessel side of things.
13:15 GuShH_ need to make a valve with a stem, about 4-5mm OD on the seal, tiny... I also need to figure out a way to use an o-ring on the valve, because I assume it will leak otherwise
13:16 GuShH_ and finally an imperial thread, I hate imperial since it means having to thread "by hand" (reversing, old school)
13:25 MrCurious GuShH_: can you check if venezuela is still there? i hear it went dark on teh net...
14:38 GuShH_ MrCurious: dunno
14:39 GuShH_ rue_house: today's hack... let's add a solenoid valve for the purge fitting on the air compressor! for now i plan to have it manual (button operated) but I will add a timer later on so it purges either before or after every cycle for N seconds (the output of the valve is adjustable anyway)
14:39 GuShH_ I happen to have just the right size one, too bad it's 220vac on the coil, but that's OK.
14:42 GuShH_ I'm thinking 555 one shot and relay, but I may want a beeper first, delay, then purge, then close.
14:42 GuShH_ (if the valve is opened far enough a purge without notice will scare the shit out of you)
14:49 rue_house GuShH_, tell me if you find a design that works good eh?
15:27 Guy-With-Mic I'm looking at Vex Robotics parts, which use "0.125" Square Shafts." Does anyone know if that's corner to corner or side to side, i.e. will they fit in a round 0.125" hole?
15:29 Casper Guy-With-Mic: I don't know, but normally when mesuring square stuff you mesure the width, not in diameters
15:30 Casper specially since the corners could be a bit rounded due to whatever, making mesurement impossible
15:33 Guy-With-Mic Cheers
15:55 GuShH_ rue_house: a design for what?
15:55 GuShH_ if I add a timer I'll make it myself
15:55 GuShH_ if you mean the valve, none... they will all get stuck eventually
15:55 GuShH_ I thought about adding a tiny metal screen and some foam, but it could get sucked in and leave the valve stuck open, just as the grit would stick it open
15:59 GuShH_ Anyway no leaks on the solenoid, but I do have a leak on the new ball valve... specifically where the male-male coupler meets, which wasn't installed by me... they didn't use sealant, not even tape... so that's leaking a bit when open (I don't like leaks of any kind)
16:01 rue_house the really cheap valve I got from china is piloted
16:01 rue_house piloted spool with O rings
16:22 rue_house GuShH_, I came up with a great design, it uses brass bolts + lathe, but the bolts cost about $15 ea
16:23 rue_house god, its getting disconcerting, I think of a device and a little voice in my head instantly tells me how to make one with any combination of tool or material limitations
16:24 rue_house now I know how to replace the bolt with wire and brass pipe
16:25 rue_house I wonder what wire guage is equiv to the thread depth of 1/8 NPT
16:26 rue_house oh now I dont need the wire
16:31 rue_house great, now I have a pneumatic cylinder, pneumatic valve, and vacuum former plans on the desk
16:31 rue_house I'll never keep up
16:32 rue_house oh I need a 15ma 24V constant current source
16:46 GuShH_ rue_house: are we talking about the same thing? it is 1/8th NPT so I guess yes
16:47 GuShH_ I connected it directly to the outlet...
16:47 GuShH_ and the outlet to a clear hose...
16:47 GuShH_ haven't tested the solenoid under pressure yet, but it's not leaking so that's good.
16:47 GuShH_ and it is rated just fine
16:48 GuShH_ thinking about using a microcontroller instead of discrete logic
16:48 GuShH_ but sure there's a need for a power supply, but there is space inside the compressor shroud for all kinds of stuff.
16:48 GuShH_ of course not too much, you don't want to obstruct airflow...
18:51 GuShh_Lap2 rue_house: another tiny mod, on the tailstock handle there's a through hole, threaded M6, problem is there was nothing pushing against the screw on the handle, so it would sometimes come loose... added a grub screw on the opposite side, fixed. Also looked at the key on the tailstock quill, it's just an M5 grub screw... not even machined for the purpose, just a regular grub screw!!
18:51 GuShh_Lap2 no wonder it's flimsy as heck. I might drill and tap M6 and machine a custom grub screw for the quill slot
18:51 GuShh_Lap2 no clue why they used M5 there.
18:52 GuShh_Lap2 also the little handle forms a bushing for the screw, so it can turn freely, but if you pack it with grease it behaves a lot nicer.
18:52 GuShh_Lap2 since it's not a proper fit, it's loose.
18:52 Shh_Lap2 wants an offset center -- or whatever they're called -- for the tailstock, so he can turn tapers without fooling around with the tailstock align
18:53 rue_shop2 HUH i JUST learned that if I pul up on the quill lock i can free-rotate the handle
18:53 GuShh_Lap2 huh?
18:53 GuShh_Lap2 as it takes inertia?
18:53 GuShh_Lap2 sure it's a screw inside
18:53 rue_shop2 just drill centers at the offsets you want them
18:53 GuShh_Lap2 probably M12 or so, didn't measure
18:53 GuShh_Lap2 that's not very good for a live center
18:53 rue_shop2 I'll photo later
18:53 GuShh_Lap2 I know what you mean
18:53 GuShh_Lap2 I do it on the wood lathe
18:54 GuShh_Lap2 to turn oval handles
18:54 GuShh_Lap2 double offset
18:54 rue_shop2 my live center and chuck for the tailstock were extra
18:54 rue_shop2 so its a different brand
18:54 GuShh_Lap2 I don't have a live center.
18:54 GuShh_Lap2 and my chuck is also an extra, with it's arbor
18:54 rue_shop2 it was part of the accessories Ipicked out with it
18:54 GuShh_Lap2 these chinks give you nothing
18:54 GuShh_Lap2 god damn china.
18:54 GuShh_Lap2 anyway the spring on the tailstock is genius.
18:55 GuShh_Lap2 no more binds
18:55 rue_shop2 dont forget its a package designed by the seller in the usa
18:55 GuShh_Lap2 I did suffer an oopsie that's why I took the tailstock apart, the oiler came loose
18:55 GuShh_Lap2 don't know where the ball and the spring went
18:55 GuShh_Lap2 they're not there anymore.
18:56 GuShh_Lap2 although I should have flushed it with compressed air, but since I keep it very well oiled I didn't want to make a mess... maybe next time I'll find the spring and the sphere
18:56 GuShh_Lap2 I'll have to turn a little cap for the oiler now
18:57 GuShh_Lap2 it really needs an oil pump and a sump for the main gears.. just drip based, but with recirculation.
18:58 GuShh_Lap2 it's just hard to do it right without getting the belts all oiled up
18:59 GuShh_Lap2 rue_shop2: any thoughts on a pump suitable for oil?
18:59 GuShh_Lap2 any water pump?
18:59 GuShh_Lap2 or should I make my own
19:00 rue_shop2 hmm
19:00 GuShh_Lap2 I thought about a windshield pump
19:00 rue_shop2 how about a systallic
19:00 GuShh_Lap2 or aquarium
19:00 GuShh_Lap2 with a filter
19:00 GuShh_Lap2 I don't know what a systallic is in this context
19:01 rue_shop2 the pump that uses the squished tube
19:01 GuShh_Lap2 there are some cheap motorcycle oil pumps that could be modified
19:01 GuShh_Lap2 no clue about squished tube pumps :p
19:02 GuShh_Lap2 but I would use a plastic bucket and the cheapest oil filter from a motorcycle for the pickup
19:02 GuShh_Lap2 and a magnet perhaps
19:02 GuShh_Lap2 right by the pickup at the bottom of the bucket
19:03 GuShh_Lap2 then a manifold (3 way) one for cutting, one for lubrication, the third to release pressure back to the bucket
19:03 GuShh_Lap2 perhaps 1 2 way and a T with a valve would be better hrm
19:03 rue_shop2 http://image.dhgate.com/albu_373483766_00-1.0x0/solvent-ink-pump-for-roland-sj-540-sc-545ex.jpg
19:04 rue_shop2 the type they use in inkjets,
19:04 GuShh_Lap2 I don't know how they work
19:04 GuShh_Lap2 If I were to build one from scratch I would use an auger design
19:04 GuShh_Lap2 like chainsaw oil pumps
19:05 GuShh_Lap2 I'm pretty sure a cheap aquarium pump will work fine with oil
19:05 GuShh_Lap2 as long as it doesn't get over 40°C
19:05 rue_shop2 its a freaking squishy tube and there are rollers that squish it around in a circle
19:06 rue_shop2 why dont you know this and why cant I find a piccutres
19:06 GuShh_Lap2 oh I can picture that
19:06 rue_shop2 there was one on hackaday for freaking sake
19:06 GuShh_Lap2 but I find the screw type easier to make
19:08 rue_shop2 persistallic
19:08 rue_shop2 http://hackaday.com/2014/01/18/peristaltic-pump-moves-fluids-uphill-both-ways/
19:08 GuShh_Lap2 I know what you're talking about though
19:08 GuShh_Lap2 they all work on similar principles
19:08 GuShh_Lap2 displacing the volume one way or another...
19:09 rue_shop2 its not like you need a lot of oil for gears
19:09 GuShh_Lap2 bah I've been in hackaday, anyone gets there.
19:09 GuShh_Lap2 I posited it on ##electronics and they challenged me to prove it
19:09 GuShh_Lap2 so I did
19:09 GuShh_Lap2 but you do for cutting
19:09 GuShh_Lap2 hence the manifold and return idea
19:09 GuShh_Lap2 http://www.practicalmachinist.com/vb/general/lathe-oil-pump-161730/
19:09 GuShh_Lap2 ah neoprene tubing... nah not gonna happen
19:10 GuShh_Lap2 http://bbs.homeshopmachinist.net/threads/58652-Homemade-cutting-oil-pump-for-the-lathe
19:10 rue_shop2 yay I made a pneumatic cylinder, I need to get some proper material for making gaskets tho
19:10 rue_shop2 oh you said gears,
19:10 GuShh_Lap2 I did?
19:10 rue_shop2 http://bedair.org/Grizzly12x/GrizzlyG4003G5.html
19:11 rue_shop2 you want that link
19:11 GuShh_Lap2 this guy is using a mikuni pump heh
19:11 rue_shop2 I have it up in my "lathe modifications" tab list
19:11 GuShh_Lap2 bah that's using a regular submersible pump probably for ponds
19:11 GuShh_Lap2 that's what I was suggesting
19:11 GuShh_Lap2 as the easiest, cheapest
19:12 GuShh_Lap2 he's missing the pickup filter and a magnet though
19:12 GuShh_Lap2 oh he does have a foam
19:12 GuShh_Lap2 lol @ the strainer
19:12 GuShh_Lap2 I would just use one from a kitchen sink
19:12 GuShh_Lap2 the smallest available
19:13 rue_shop2 I'm not saying thats how I'd do everything, its in my ideas for the lathe
19:13 rue_shop2 I got a gooseneck coolant tube from ebay
19:13 GuShh_Lap2 I can't find those cheap here
19:13 rue_shop2 chiiiina
19:13 GuShh_Lap2 can't order
19:13 rue_shop2 why not?
19:14 GuShh_Lap2 ask the politicians
19:14 rue_shop2 not from china/
19:14 rue_shop2 ?
19:14 GuShh_Lap2 not without paying a fortune no.
19:14 rue_shop2 your in aus aren't you/
19:14 rue_shop2 ?
19:14 GuShh_Lap2 AR
19:14 rue_shop2 usa?
19:14 GuShh_Lap2 argentina
19:14 GuShh_Lap2 85% in total tax
19:14 rue_shop2 can you get stuff from canada?
19:15 GuShh_Lap2 50% plus 35%
19:15 GuShh_Lap2 plus they follow your every move
19:15 GuShh_Lap2 no, can't import anything in general without paying premium fees now
19:15 GuShh_Lap2 they changed it to fuck us in the arse.
19:15 rue_shop2 how about if I send you a gift package?
19:15 GuShh_Lap2 I used to order from china on a daily basis
19:15 rue_shop2 with $0 value
19:16 GuShh_Lap2 they are stopping most of the packages whether they are declared as gifts or not now
19:16 GuShh_Lap2 the trip to customs is 120KM back and forth.
19:16 rue_shop2 huh
19:16 GuShh_Lap2 you add up the cost of fees and fuel, plus time... not worth it anymore
19:16 GuShh_Lap2 they did all of this on purpose.
19:17 rue_shop2 so your area is gonna have a huge inflation rate soon
19:17 GuShh_Lap2 it already does.
19:17 rue_shop2 huh
19:17 GuShh_Lap2 and it's bad
19:17 GuShh_Lap2 we devaluated again a month ago
19:17 rue_shop2 welcome to the world wide ecenomic collapse
19:17 GuShh_Lap2 people speculate, which isn't good at all since prices go up out of proportion
19:17 GuShh_Lap2 "just in case"
19:19 GuShh_Lap2 rue_shop2: so fountain / lake / aquarium pumps work just fine for this
19:19 GuShh_Lap2 That's what I'll get
19:19 GuShh_Lap2 make sure you get rid of excess pressure by sending it off to the tank
19:19 GuShh_Lap2 otherwise they burn out, because of the higher load on the motor from what I've read
19:20 GuShh_Lap2 anyway my "tank" may well end up being an old metallic oil can.
19:21 GuShh_Lap2 eeeew
19:21 GuShh_Lap2 I turn on the tv... CSI in Spanish
19:21 GuShh_Lap2 just shoot me SHOOT ME NOW
19:23 GuShh_Lap2 anyway thanks to feng shui we have cheap tiny pumps to play with
19:27 GuShh_Lap2 rue_shop2: an absolute win would be to have an aux pulley on the motor and run it off that, like an IC engine :>
19:27 Tom_itx pc all cleaned out now
19:39 GuShh_Lap2 http://bimg2.mlstatic.com/bomba-de-agua-para-fuentes-peceras-feng-shui-250-lh-5w_MLA-F-129526928_9145.jpg
19:40 GuShh_Lap2 can't find 'em on 12v :(
19:40 Tom_itx rue_house what do you use for interweb now?
19:40 GuShh_Lap2 a hamster takes care of that, Tom_itx
19:40 Tom_itx all the pc's nice n clean now
19:40 Tom_itx cleaned out the server just now
19:41 GuShh_Lap2 wahahaha 40 dollars for a flexible lubricant hose!!
19:41 GuShh_Lap2 f me.
19:42 Tom_itx use a copper tube
19:42 GuShh_Lap2 eventually the copper breaks, and it's more dangerous than plastic, should you spaz out
19:42 Tom_itx get some of that snap together stuff
19:42 GuShh_Lap2 that's what I'm talking about
19:42 GuShh_Lap2 40 bucks
19:42 GuShh_Lap2 http://articulo.mercadolibre.com.ar/MLA-494195455-flexible-lubricador-doble-con-base-magnetica-floresta-_JM
19:43 GuShh_Lap2 this country has really gone to shit now.
19:43 rue_house whats the code for your currency there?
19:43 Tom_itx i've got a bit of that
19:43 GuShh_Lap2 ARS
19:43 GuShh_Lap2 but the official rate is a lie
19:43 GuShh_Lap2 it's at over 10 to 1
19:43 rue_house wow
19:43 GuShh_Lap2 and if you exchanged prior to that, it means you've lost even more.
19:44 GuShh_Lap2 this thing shouldn't cost more than 5 bucks
19:45 rue_house according to the year graph, its been worse
19:45 GuShh_Lap2 no it hasn't
19:45 rue_house http://www.xe.com/currencycharts/?from=CAD&to=ARS&view=1Y
19:45 GuShh_Lap2 we just got through the worst devaluation since over 40 years ago
19:45 GuShh_Lap2 and based on how quick it happened, it is the worst so far.
19:46 GuShh_Lap2 like I said the official rate is a lie
19:46 GuShh_Lap2 it's way higher.
19:46 GuShh_Lap2 we have 4 ongoing rates
19:46 rue_house hmm
19:46 rue_house so if I see it hit 5ish I should buy?
19:46 GuShh_Lap2 official (bs), blue (streets), tourist (...) and the last I forgot
19:47 Tom_itx https://www.acklandsgrainger.com/AGIPortalWeb/agi/LOC-LINE/Lubrication/_/N-1z0y0srZ1z0wsmzZbzk5Z1txs?JSESSIONID=rB1XTKgcW9dxY8TcM9F2JtWbLkGWgpMd9nxZN9pFtlCvXKKBmBpB!190705618!-21923879&JSESSIONID=TT2zSxcCQlbkykxp1pwJhYSnctsyJnZ6vQkkGhn06vLGKyV9G41f!-1825086291!-28954189
19:47 Tom_itx it's still pretty expensive
19:47 GuShh_Lap2 oh yeah the last one they made it up, it's "savings" rate
19:47 GuShh_Lap2 which is a lie as well you can't buy those USD
19:47 rue_house GuShh_Lap2, you gonna switch over to bitcoin?
19:47 GuShh_Lap2 I'm gonna switch over to lead bullets if this keeps going on
19:48 Tom_itx for what?
19:48 Tom_itx you can't eat with bitcoin
19:48 rue_house you can
19:48 rue_house stores around the world are starting to accept it
19:48 Tom_itx not at walmart
19:48 GuShh_Lap2 these flex hoses should be CENTS
19:48 Tom_itx agree
19:48 GuShh_Lap2 but because they are for "professional use" they charge whatever they want
19:48 Shh_Lap2 sighs de
19:49 rue_house at somepoint tonight this persistant snow is gonna snapp off a tree thats gonna land on the primary power line
19:49 rue_house I'm gonna have to go out in my god damned pajamas and get the genorator going
19:49 GuShh_Lap2 you know there's something fundamentally wrong when the cost of everything else for your lubrication system is LESS than the cost of the flex hose
19:49 rue_house GuShh_Lap2, can I start a store in your town?
19:49 GuShh_Lap2 pump, bucket, hoses, fittings... it's all less.
19:49 GuShh_Lap2 you could
19:50 rue_house use a rubber hose with 1/8" solid wire wrapped around it for now
19:50 GuShh_Lap2 I might, but it sickens me
19:50 rue_house or a steel rod in it
19:50 Tom_itx SS if you can find it
19:50 rue_house (oversize hose obviously)
19:51 rue_house ok
19:51 GuShh_Lap2 since it's oil, it woudln't rust
19:51 rue_house I need to do things before the weekend finishes
19:51 GuShh_Lap2 I don't plan on using water based fluids
19:51 GuShh_Lap2 my weekend finishes in 1:30 hs
19:51 GuShh_Lap2 I did quite a lot actually.
19:51 GuShh_Lap2 but it's never enough
19:52 GuShh_Lap2 what's the simplest carriage mechanism you can think of to raise or lower an object with 0.5mm or so resolution?
19:52 rue_house I need a 19V power supply thats current limited to 25ma
19:52 GuShh_Lap2 thinking about making a small EDM machine
19:53 rue_house use a threaded rod
19:53 GuShh_Lap2 sure, with a couple rods for support
19:53 GuShh_Lap2 but is there anything simpler
19:53 rue_house have nuts on the threaded rod buckle springsteel straps thtat push up the bed
19:53 GuShh_Lap2 given the small size M6 would do and a delrin nut
19:55 rue_house hmm, can I use a 7x05 to drop 5V off a power rail?
19:55 GuShh_Lap2 what do you mean?
19:55 GuShh_Lap2 and what's your input voltage
19:56 GuShh_Lap2 24?
19:56 rue_house yea
19:56 rue_house I need to drop off 5V
19:57 rue_house my head wont wrap around this
19:57 GuShh_Lap2 lol I just asked a question on that flex hose item, and got a respone 2 minutes ago
19:57 rue_house bah, I'll just do it the other way
19:57 GuShh_Lap2 that's nuts. it's 10:40PM on a Sunday
19:57 GuShh_Lap2 and that's a relatively big store
19:58 GuShh_Lap2 see that's a good thing in my book...
19:58 Tom_itx rue_house, yes
19:58 Tom_itx use it as the GND reference
19:59 GuShh_Lap2 mr ground gets high today
19:59 rue_house Tom_itx, then the load is pulling up on it tho
19:59 Tom_itx then don't
19:59 GuShh_Lap2 your load is insignificant
19:59 rue_house oh yea
19:59 GuShh_Lap2 hopefully that's not what she said.
19:59 Tom_itx or a handfull of diodes
20:00 GuShh_Lap2 lol
20:00 Triffid_Hunter rue_house: vbe multiplier
20:00 Triffid_Hunter although I'd suggest that if you need to subtract 5v from your power rail, you may be doing it wrong in the first place
20:00 GuShh_Lap2 heh
20:01 GuShh_Lap2 I haven't used a vbe multi in ages
20:01 GuShh_Lap2 I was kludging it back then
20:01 GuShh_Lap2 last time it was a small variable dummy load
20:01 rue_house Triffid_Hunter, yea
20:01 Triffid_Hunter they're commonly used in the output stage of class AB amps
20:05 GuShh_Lap2 rue_house: couldn't a simple piston, crank and rod design be used to pump fluids as well? specially oil
20:06 GuShh_Lap2 with an open crank, so it doesn't hidrolock if the seal isn't good enough
20:07 rue_house gearpump
20:07 rue_house even if its leaky you would be ok
20:08 GuShh_Lap2 can't easily cut gears
20:08 rue_house use some of the scrap ones from the old photocopier
20:08 rue_house or the printer
20:08 GuShh_Lap2 I don't know where my gears are at
20:08 GuShh_Lap2 I had a jar full of 'em
20:09 rue_house or that toner cartridge you haven't gotten rid of yet
20:09 GuShh_Lap2 lol
20:09 GuShh_Lap2 I don't tend to keep trash around
20:09 rue_house you hae a lathe, 'around' shoudl be the going thing
20:12 rue_house the regulators will drop between .025 and .15W
20:12 rue_house total, hmm
20:12 rue_house I suppose to3 is ok
20:12 rue_house er
20:13 GuShh_Lap2 overkill
20:13 GuShh_Lap2 to220 without heatsink will do
20:13 GuShh_Lap2 long term, continous use
20:13 rue_house no I'm thinking of L series
20:13 rue_house and I'm having a brain fart
20:13 rue_house to-92
20:14 rue_house iirc are rated for about .5w
20:14 rue_house wonder if I'll clear the dropouts...
20:16 Shh_Lap2 hands rue_house some co
20:26 rue_shop2 COFFEEEEEEE COFFEEcoffee coffee coffee coffee coffee coffee coffee
20:27 rue_shop2 lm317: ADJ, OUT, IN
20:30 rue_shop2 42R = 15R + 27R
20:33 rue_shop2 freaking out of 15R
20:33 rue_shop2 WTF!
20:33 rue_shop2 I have 16, no 15
20:57 GuShh_Lap2 rue_shop2: combine until you get 15R
20:57 GuShh_Lap2 or use a variable resistor
20:59 GuShh_Lap2 rue_shop2: you reckon archimedes screw design is not going to cut it to pump oil?
20:59 rue_shop2 er no
21:00 GuShh_Lap2 for low volume I don't see why not
21:00 rue_shop2 up a few years and use a tasla pump?
21:00 GuShh_Lap2 I'm looking at things I can build easily
21:01 GuShh_Lap2 I don't see why the auger wouldn't work
21:06 GuShh_Lap2 rue_shop2: given we're not talking high pressures, I can live with low tolerances as long as some fluid is moved around, it would be sealed by double o-rings on each side
21:11 rue_shop2 you know how the pond pumps are made, right?
21:11 rue_shop2 its as low tolerance as it gets
21:11 GuShh_Lap2 it's just a prope
21:11 GuShh_Lap2 prop
21:12 rue_shop2 with like 1mm gap
21:12 GuShh_Lap2 so I don't see why a screw pump wouldn't work
21:12 GuShh_Lap2 I'm not attempting to pump air at 200PSI or anything like it
21:12 GuShh_Lap2 just oil, elevate to less than 1 meter high
21:13 rue_shop2 it seems I keep having to beat my head against voltage limited current sources
21:13 rue_shop2 this is annoying, I have no overhead left for a 24V battery if I use a lm317 for current limit and a 78xx for votlage regualtion
21:17 rue_house I ahve between 20 and 28V in
21:17 rue_house I need 19 out, current limited to 30mA
21:17 rue_house this isn't hard, I'm just not thinking of the answer
21:17 GuShh_Lap2 for what
21:17 rue_house fire alarm test supply
21:18 GuShh_Lap2 let me channel the EE in me
21:18 rue_house my damn new bench supply is a variant of the same prolem
21:22 rue_house I'm throwing technology at it now
21:23 rue_house two op-amps, two diodes, and a fet
21:42 rue_shop2 gonna use this 2n7000 successfully on a project one day
22:43 rue_house I got it but the votlage regulation is a mess and I dont know why
22:44 rue_house I have the op-amp (lm324) 4V off the + rail and it dosn't seem to be behaving
22:45 rue_house Common-mode voltage VCC330V 0 VCC-1.5 0 VCC-1.5Vrange3 VCC-1.5
22:46 rue_house maybe if cant hold it down far enough
22:46 rue_house current regulation is fine
23:13 rue_house odd how so many parts on a breadboard can result in such a small schematic
23:16 rue_house gain is 120db
23:18 MrCurious http://www.dogeweather.com/
23:18 rue_house ooo there is a glitch with the + input votlage range..