#garfield Logs

Jul 17 2020

12:12 AM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1160616.jpg
12:45 AM rue_mohr: *sigh* the housing for the course in sep was canceled on me
05:07 AM polprog: what course?
05:37 AM Tom_itx is now known as Tom_L
08:16 AM rue_bed: final electrical
09:22 AM MoonyMoon: ;)
09:38 AM Tom_L: hey moon
09:38 AM rue_mohr: everything is trying to keep me from finishing that
09:38 AM Tom_L: no online course to finish it ehh?
09:39 AM rue_mohr: it might be online only by now
09:39 AM Tom_L: you could come here, the vo'tech started teaching lineman courses here couple years ago
09:39 AM polprog: https://twitter.com/RueNahcMohr/status/1284130479436754945?s=19
09:39 AM Tom_L: wanna fly around in a copter checking wires?
09:40 AM polprog: i never thought a ttl push pull can be either side, i always put the pnp on top
09:41 AM rue_mohr: has to be canada
09:42 AM rue_mohr: polprog, its a voltage follower, it works pretty good for driving fets
09:42 AM rue_mohr: its terribly unlinear like that tho, so, not good for much else
09:42 AM Tom_L: rue_mohr, what would it certify you for then?
09:42 AM rue_mohr: ticketed electrician
09:42 AM rue_mohr: +-
09:42 AM Tom_L: journeyman?
09:43 AM rue_mohr: http://ruemohr.org/~ircjunk/circuits/fetdrive.gif
09:43 AM rue_mohr: yep
09:43 AM Tom_L: i'm not familiar with all the steps between
09:43 AM Tom_L: other than a 5 yr apprentice
09:43 AM rue_mohr: L1, L2, L3, L4, (fancy junk) -> red seal
09:44 AM Tom_L: by then you're old n grey
09:44 AM rue_mohr: hmm 450V
09:45 AM rue_mohr: Tom_L, yea,
09:45 AM polprog: so its not a push-pull?
09:45 AM rue_mohr: yup
09:45 AM Tom_L: but making the bucks
09:45 AM polprog: or is it like a dual voltage follower
09:45 AM rue_mohr: push pull voltage follower
09:45 AM polprog: hmm
09:45 AM polprog: interesting
09:46 AM rue_mohr: like I say, its nonlinear, but it works fine for fets
09:46 AM rue_mohr: I have the timing in the google drive stuff I think
09:46 AM polprog: ill have to play with it. my latest find is adding small caps to improve slew rate on bjt push pulls
09:47 AM polprog: but i think i saw that at yours somewhere
09:48 AM rue_mohr: http://ruemohr.org/~ircjunk/circuits/fetdrive.gif
09:49 AM Tom_L: https://www.instagram.com/p/CBo6DsdppXE/
09:49 AM Tom_L: (loud)
09:49 AM polprog: no, not like that
09:49 AM Tom_L: https://www.youtube.com/watch?v=H_zOoYeQqHY
09:51 AM Tom_L: rue_mohr, linuxcnc can do that
09:52 AM rue_mohr: hahah cool
09:52 AM Tom_L: skunkworks has done some
09:53 AM rue_mohr: I'd like to see it in slow motion
09:53 AM Tom_L: one sec
09:53 AM rue_mohr: the cut angles must go all over the place
09:53 AM rue_mohr: have to go for work, late already
09:54 AM Tom_L: https://www.youtube.com/watch?v=_S_bGAuTN0s&feature=youtu.be
09:54 AM Tom_L: that's the one he did
09:55 AM Tom_L: it's a lcnc comp he wrote
09:55 AM Tom_L: but the little lathe's spindle just about isn't strong enough
05:54 PM zhanx: Ok wiring started for security system
05:57 PM Tom_L: fun
05:59 PM zhanx: Not in this heat and humidity
07:14 PM rue_mohr: https://twitter.com/RueNahcMohr/status/1284130479436754945/photo/1
07:14 PM rue_mohr: ok, lets try it
07:28 PM rue_mohr: 400-450V
07:32 PM rue_shop1: hahaha
07:33 PM rue_shop1: the jukebox started playing *just* as a hit the power switch for my breadboard supply
07:39 PM Tom_L: :)
07:39 PM Tom_L: that last yt was a slomo of that cutting process
07:39 PM Tom_L: after you left
08:00 PM rue_mohr: Tom_L, no I mean with the rotating cutter doing the hex
08:02 PM Tom_L: same principle
08:02 PM Tom_L: they're in sync with each other
08:11 PM rue_mohr: https://twitter.com/AbdulhakeemNS/status/1284290533129625602/photo/1
09:35 PM zhanx_: Ok new wiring started in the shop
09:36 PM zhanx_: Overhead work sucks
09:36 PM zhanx_ is now known as zhanx
10:21 PM rue_mohr: k
10:21 PM rue_mohr: your back?
10:25 PM zhanx_: Yes my back is screaming
10:28 PM rue_shop2: http://zpostbox.ru/how_to_determine_permeability_of_unknown_cores_online_calculator.html
10:42 PM Tom_L: learned about dividing heads tonight
10:49 PM Tom_L: wasn't quite what i had thought
10:58 PM rue_mohr: oh?
11:07 PM Tom_L: https://www.youtube.com/watch?v=8UvAkg0iZMg
11:07 PM Tom_L: he explains it good
11:08 PM Tom_L: https://www.youtube.com/watch?v=Q-XOM4E4RZQ
11:20 PM Tom_L: too costly to get into just for the heck of it
11:21 PM Tom_L: it is interesting though
11:37 PM rue_mohr: winding a transformer...
11:37 PM rue_mohr: for the 120V true-sine inverter