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[20:01:18] <katsmeow> odd user name:
http://www.ebay.com/sch/c358f17ec01ae6dcf770df16cd5ff7c84bb260e19c214089011/m.html
[20:47:13] <rue_house> hey kat!
[20:47:37] <katsmeow> hey rue!
[20:47:55] <katsmeow> <_< >_>
[20:48:08] <rue_house> heh
[20:48:57] <rue_house> I was digging thru my laptop supplies and realized I can make a pretty good bench supply from one of them
[20:49:01] <rue_house> 19V 6A
[20:49:48] <katsmeow> 6A = 5A, and only if you break it open and put a fan on it
[20:49:52] <katsmeow> doneit
[20:49:55] <katsmeow> been there
[20:50:06] <rue_house> point taken
[20:50:10] <katsmeow> they get forking hot at 5amp, really fast
[20:50:19] <katsmeow> got to have a fan on them
[20:50:22] <rue_house> hmm
[21:07:38] <rue_shop3> bURP
[21:08:03] * katsmeow runs
[21:08:08] <rue_shop3> :P
[21:55:06] <katsmeow> btw, the transformer in those can be in contact with the plastic shells, some are even glued to the shell
[21:55:29] <katsmeow> i score the shell deeply with the bandsaw, and then split the ends off
[21:56:02] <katsmeow> that way you can work a thin blade tween the transformer top and the shell and pop it straight off
[21:57:57] <katsmeow> if you rock the transformer any, yo can break the leads off it, or break the windngs wires off the leads
[22:23:15] <katsmeow> http://www.theguardian.com/world/2016/jan/14/canada-sled-pills-xanax-us-border-vermont
[22:24:01] <katsmeow> the moral of the story is: smaller parcels, move faster, move under the snow and at night
[22:26:04] <rue_house> oh
[22:27:22] <rue_house> anti-anxiety Xanax pills in a duffel bag on the sled
[22:27:34] <rue_house> so they DO want people in the USA to have anxieties
[22:28:18] <katsmeow> Canadian marriage photobombed :
https://i.guim.co.uk/img/media/f9386e8c1ff0c30c4fd50896d50bb619a3d65e39/0_0_3543_2359/master/3543.jpg?w=700&q=85&auto=format&sharp=10&s=54f3c46e108980c0cb7269b7116668ba
[22:32:59] <rue_shop3> I dont get it
[22:46:57] <rue_shop3> hmm, its not the LC thats causing the resonation, it looks like its the inductors self-resonation freq
[22:47:02] <rue_shop3> thats not cool
[22:48:43] <katsmeow> in what?
[22:49:39] <rue_shop3> the first output inductor
[22:49:46] <rue_shop3> I shouldn't have used a toroid
[22:50:04] <rue_shop3> I wonder if cracking it would be enough of a cap
[22:50:06] <rue_shop3> gap
[22:50:26] <rue_shop3> er, hmm its too wound
[22:50:32] * rue_shop3 thinks
[22:50:39] <rue_shop3> I can parallel the output of the two fets
[22:50:54] <katsmeow> what resonation?
[22:50:56] <rue_shop3> they are just split so that I can drive them at max 50%
[22:51:07] * katsmeow looks around the irc. but doesn't see it
[22:51:08] <rue_shop3> oh, I'll paste you the new log
[22:51:46] <rue_shop3> https://hackaday.io/project/296-bench-power-supply
[22:51:54] <rue_shop3> the log called 'oops, thats gonna need math'
[22:52:25] <katsmeow> i hate problems like that, because each lil change needs new different maths
[22:53:22] <katsmeow> wow, you covered that perfboard in stuff
[22:53:44] <katsmeow> your scope lead is grounded in the worst place
[22:54:11] <katsmeow> gnd it over near the fet and it's transformer
[22:55:12] <katsmeow> you could be seing 5v of crap that donesn't even exist where you have it gnd'd now
[22:59:22] <rue_shop3> ceramic saw blade, + lathe + toroid = C core
[22:59:52] <rue_shop3> good point
[23:24:29] <katsmeow> A bulb that is 100 percent efficient at converting energy into light would have an efficacy of 683 lm/W.
[23:24:35] <katsmeow> To put this in context, a 60- to 100-watt incandescent bulb has an efficacy of 15 lm/W, an equivalent CFL has an efficacy of 73 lm/W, and current LED-based replacement bulbs on the market range from 70-120 lm/W with an average efficacy of 85 lm/W.
[23:24:56] <katsmeow> meaning: some cfl are more efficcient than some leds
[23:45:24] <rue_shop3> have you seen some of those led driverS?
[23:46:03] <katsmeow> nO
[23:46:30] <rue_shop3> resistors
[23:46:34] <rue_shop3> need I say more
[23:46:54] <katsmeow> that's hardly high tech, or stable
[23:47:44] <rue_shop3> arg
[23:47:47] <katsmeow> oh yea, the Philips circular one is a circle of leds and a circle of smd resistors
[23:48:02] <rue_shop3> the set driver isn't behaving when the fets are connected to the filter
[23:49:43] <rue_shop3> the uc3842 goes up to 97% output duty
[23:50:09] <katsmeow> brb
[23:51:00] <rue_shop3> the tl494
[23:52:03] <rue_shop3> is 90%
[23:55:56] <rue_shop3> 30V out at 97%
[23:56:17] <rue_shop3> ah, is less than 31
[23:56:41] <rue_shop3> less than 34 for 90%
[23:57:03] <katsmeow> bak
[23:58:04] <rue_shop3> its split, I could make this a push pull converter
[23:58:18] <rue_shop3> tho I cant isolate it, need the feedback hard wired
[23:58:52] <katsmeow> it's a toroid, the simplest thing to add a couple turns for a separate feedback
