#garfield Logs

Dec 06 2020

12:36 AM rue_mohr: the course kinda expects that you were taught most of th rules in your prev year of curse
12:43 AM rue_mohr: but I'v been thru 3 code books over my schooling
08:56 AM polprog: i got some chips today
08:56 AM polprog: a guy who trades quite intereting stuff for cheap
08:56 AM rue_mohr: I did too, salt and vinegar
08:56 AM polprog: (like DC-DC converters for $2, but i mean *good* converters, german/swiss/us made isolated)
08:57 AM rue_mohr: I was going to get catchup, but...
08:57 AM rue_mohr: nice
08:57 AM polprog: had a cardboard tray with various ICs, i browsed a bit and found they are all 4000 or 7400
08:57 AM polprog: http://localhost/kartykat/74series/74AUP1G158.pdf
08:57 AM polprog: ergh
08:57 AM polprog: https://polprog.net/rozne1/ircjunk/various/chips.jpg
08:57 AM rue_mohr: AUP.... thats new
08:57 AM polprog: yeah thats just what my auto-ripper downlaoded from what was linked on wikipedia
08:58 AM polprog: i decided to download locally all 4000 and 7400 datasheets
08:58 AM rue_mohr: 8085
08:58 AM polprog: yes
08:58 AM polprog: he said the big ones are 3 pln each and the small ones are 1 pln each
08:58 AM polprog: i said ill give him 50 for the whole box
08:58 AM rue_mohr: if the harris one is listed, it could be interesting
08:58 AM polprog: harris! thanks :D
08:58 AM polprog: i have no idea what that is
08:58 AM polprog: so
08:58 AM polprog: there are total 110+ of these small ones
08:59 AM polprog: 8085, 8080, 74ls273, *373, *244 etc
08:59 AM polprog: even two LM741 :)
08:59 AM polprog: how the hell do i store it now, i dont have enough drawers
09:00 AM rue_mohr: I do ranges
09:00 AM rue_mohr: 00-02 04-08
09:00 AM polprog: there are some that arent 74 or 4000
09:00 AM polprog: STC 8427
09:00 AM rue_mohr: first based on numberical distribution, then adjusted for population
09:00 AM polprog: no hits..
09:01 AM polprog: 8251 thats an IO controller innit?
09:01 AM rue_mohr: lots of cmos
09:01 AM polprog: what's that S logo?
09:01 AM rue_mohr: 8251 is a uart
09:01 AM polprog: yay, i was right
09:02 AM rue_mohr: 8253 is a tripple timer
09:02 AM polprog: oh, that 8427 is a datecode. its a 4116 dram
09:02 AM rue_mohr: 8255 is tripple io
09:02 AM polprog: wait
09:02 AM polprog: let me move these aside
09:02 AM rue_mohr: 8279 is ... dma or video?
09:02 AM rue_mohr: mind static
09:03 AM Tom_L: bet you wish you could pop off those sparkie answers that quick :)
09:03 AM rue_mohr: yea
09:03 AM polprog: 8279 is a programmable keyboard display iface
09:03 AM rue_mohr: 82S09 I'v never heard of
09:03 AM rue_mohr: oooh
09:03 AM rue_mohr: 8279 is that silly one
09:04 AM rue_mohr: your better off using software
09:04 AM polprog: haha
09:04 AM rue_mohr: seriosly, check out the daatasheet for that stupid thing
09:04 AM polprog: mom passed by, looked at the table
09:04 AM rue_mohr: wtf were they thinking
09:04 AM polprog: "you should satart selling some of this"
09:05 AM rue_mohr: 82S09 is ram?
09:05 AM rue_mohr: 64 x 9?
09:05 AM polprog: parity nice
09:05 AM polprog: (82S09 / 82S19) 576-BIT BIPOLAR RAM
09:06 AM rue_mohr: it looks like a dual port buffer
09:06 AM rue_mohr: that could be really neat for a fsm
09:07 AM polprog: yes
09:07 AM polprog: im so glad i got the 74*373s
09:07 AM rue_mohr: oh its not clocked tho
09:07 AM rue_mohr: the 374 are what you want
09:07 AM polprog: there is a 374 too
09:07 AM rue_mohr: 373 is transparent, cant be used for a state machine loop
09:08 AM polprog: MK50395 six decade counter / display decoder
09:08 AM polprog: PMOS
09:08 AM rue_mohr: nice
09:09 AM polprog: N82S123N, these had labels
09:09 AM rue_mohr: not familiar with 123
09:10 AM polprog: 256 bit prom
09:10 AM polprog: meh
09:10 AM rue_mohr: huh there are a few of those 82S09, I wonder what they came from
09:10 AM polprog: what are these?
09:10 AM polprog: where are they in the picture
09:10 AM rue_mohr: the N82S09
09:11 AM rue_mohr: looks like 3 of them
09:12 AM polprog: i cant see them
09:13 AM rue_mohr: on the lower right, the 28 pin
09:13 AM polprog: ah these yeah
09:14 AM rue_mohr: there is some other stuff for analog in there, I saw 4051
09:16 AM polprog: i think i have to open up a spreadsheet now
09:17 AM polprog: just for stocktaking purposes
09:17 AM polprog: my dad was joking
09:17 AM polprog: take one of these pocket PCs with tag scanners and implement barcode labels
09:17 AM polprog: that is not a stupid idea
09:17 AM polprog: especially for the PCI cards
09:17 AM polprog: i have at least 50 of these
09:18 AM rue_mohr: aandrew, you need to show us how to use CV to get chip numbers
09:18 AM polprog: *click* uploading photo......
09:18 AM polprog: your chips are worth: $ 1352.00 total
09:19 AM rue_mohr: pfff
09:19 AM rue_mohr: not from china
09:19 AM polprog: :P
09:19 AM polprog: you have no idea
09:19 AM Tom_L: those didn't come from china
09:19 AM polprog: how much actual windowed 27c512 are on ali
09:20 AM rue_mohr: yea its crazy
09:20 AM rue_mohr: and how many I'v collected
09:20 AM rue_mohr: right now...
09:20 AM rue_mohr: I have 20 on this desk
09:20 AM polprog: haha
09:20 AM rue_mohr: just a few from the shop
09:24 AM rue_mohr: no 555 :)
09:56 AM polprog: ok
09:56 AM polprog: back
10:01 AM rue_mohr: arg, my brain is being just useless right now
10:01 AM rue_mohr: I cant even get it to work out my own stuff
10:03 AM rue_mohr: the frequency that I consider going back into coding is slowly rising
10:06 AM polprog: sorting this will take forever
10:07 AM rue_mohr: no
10:07 AM rue_mohr: it'll just take that much longer than you have
10:09 AM rue_mohr: ok I have a plan
10:09 AM rue_mohr: no idea if its a good one
10:10 AM Tom_L: heh
10:11 AM rue_mohr: I cant keep up with the presented material
10:11 AM rue_mohr: so I'll focus my studdying on the stuff for the provincial final
10:11 AM rue_mohr: which is a mix
10:13 AM Tom_L: how is the course material weighted against the final?
10:13 AM Tom_L: quizzes etc
10:14 AM rue_mohr: I'v been burried
10:14 AM rue_mohr: I thought I could catch up this weekend
10:15 AM rue_mohr: after yesterday I can see thats not possible
10:26 AM aandrew: *I* need to show you how to use CV to get chip numbers?
10:26 AM rue_mohr: :)
10:26 AM rue_mohr: didn't you do opencv?
10:27 AM aandrew: no, I have a hankering to use it for license plate recognition but have never actually done anything useful with it yet
10:28 AM rue_mohr: hmm
10:47 AM aandrew: man I haven't even taken that 3018 out of the box yet and I bought a 500W spindle and some longer 4020 Z rails for it
10:48 AM Tom_L: is that that tiny cnc mill?
10:48 AM aandrew: yes
10:48 AM Tom_L: i be curious how you like it
10:48 AM aandrew: me too, I have no (real) intention to do anything metal on it
10:48 AM Tom_L: somebody in #linuxcnc was looking at one from ali
10:48 AM aandrew: I do want to do plastic though
10:49 AM aandrew: I'd *like* to do some soft alu but I also have to be realistic
10:51 AM aandrew: honestly though I think if I can cut my teeth on this one it will give me confidence and experience to CNCize the bridgeport
10:52 AM Tom_L: bone is pretty soft...
10:52 AM aandrew: throw a 2-3HP AC or DC motor on it
10:52 AM Tom_L: i went with a 1.2kw bldc
10:53 AM Tom_L: that's what? about 2hp?
10:53 AM Tom_L: i dunno
10:53 AM aandrew: Tom_L: I'd rather not mill anything directly connected to my body
10:53 AM aandrew: Tom_L: 500W? no. 746W per HP
10:53 AM Tom_L: 1.2kw
10:53 AM aandrew: oh
10:53 AM Tom_L: on mine
10:53 AM aandrew: 1.2kW is just shy of 2HP
10:53 AM aandrew: 1.6
10:54 AM aandrew: not just shy :-)
10:54 AM Tom_L: better than the 200w i had
10:55 AM rue_mohr: unless its all rpm
10:55 AM Tom_L: nope
10:56 AM Tom_L: i tapped at 500 rpm
10:56 AM Tom_L: wasn't sure i should try anything slower
11:06 AM TermMoon: :D
11:44 AM rue_mohr: TermMoon, fail plan, do the ip practice questions till I die and let the rest burn, hope it all comes out ok
11:57 AM aandrew: bought an aluminum blade for my mitre saw... holy hell they're dear
11:57 AM aandrew: $100 for a 12" blade
12:58 PM aandrew: there we go, got the blinking lights out of my wife's beaver (ha ha ha)
12:58 PM aandrew: got this outdoor beaver decoration but they had several blinking LEDs in it and I hate blinking LEDs
12:59 PM aandrew: so I bought a bunch of warm white LEDs for like $3 and swapped out the blinking ones. Much better
01:48 PM TermMoon: rue_mohr: thats the best plan. Thats kinda my idea too
01:49 PM rue_mohr: failed the practise IP, ran out of time and got a bunch wrong
01:50 PM TermMoon: :(
01:50 PM rue_mohr: yep
01:50 PM rue_mohr: what table for bonding conductor sizing , quick!
01:50 PM rue_mohr: Table 16....
01:51 PM TermMoon: ?? 1 sec
01:53 PM TermMoon: Just use #6 for everything
01:54 PM rue_mohr: ---->Table 16<----
01:54 PM TermMoon: AGHDDJS ok
01:56 PM TermMoon: ok and?????
01:57 PM rue_mohr: thats one of the "you got exevery question we asked on this wrong" lessons
04:04 PM rue_mohr: ok 88% on the second try
04:04 PM rue_mohr: (different questions)
04:25 PM Tom_L: that's not so bad
04:50 PM rue_mohr: I'm gonn arepot a plant and try again
04:51 PM Tom_L: metaphor or for real?
05:21 PM rue_mohr: I repotted the poinsetta I bought yesterday
05:22 PM Tom_L: oh
07:58 PM aandrew: I am in the not uncommon situation of not having enough clamps
08:39 PM aandrew: there. finally got the basement light switches reinstalled and covered up
08:39 PM aandrew: started this a year ago :-/
08:40 PM aandrew: main basement lights were on a 3-way switch, I wanted to also have a smart switch on that but also have the real switches to work as expected
08:40 PM aandrew: stairwell lights are also 3-way and was going to put those on a smart switch too but ultimately decided against it (for now)
08:42 PM aandrew: shelly has a dimmer module that has two switch inputs which is useful for this, but my basement lights consume 180W which is above its capability. Thankfully I found a permanent 120V in the junction box with the 3-way that sent power to the lights so that made it real easy
08:43 PM aandrew: I also have a (temporary) setup with a dual smart outlet for lighting above my son's drums area and another over the exercise equipment
08:43 PM aandrew: and then my office lights are also temporarily powered with another smart swich
08:43 PM aandrew: these are all temporary because I haven't run proper wiring in to them since i'm not 100% sure I want to keep the layout of the basement the way it is
08:44 PM aandrew: anyway the upshot of all of this is that EVERYONE is lazy and forgetful with the lighting and I'm sick of chasing after them to turn the lights off
08:45 PM aandrew: and since i"m usually in the basement last and am lazy myself, I dont' like walkng all over the place to shut everything off so I just now say "goodnight" and it shuts off the office, music, exercise, basement lights and my son's glue gun outlet as well
08:46 PM aandrew: the shelly switches are by far the best ones I've found. They're tiny, some are UL/CSA listed and they not only support open source but also open protocols. You can use MQTT to work with them if you like, no internet gateway or smart home hub device required
08:46 PM aandrew: they're also largely the most reasonably-priced, non-ali ones I can find
09:05 PM rue_mohr: http://ruemohr.org/~ircjunk/programming/cupl/fsm/ <-- wincupl
09:05 PM rue_mohr: that was a fight, that program sucks
09:07 PM rue_mohr: aandrew, hah
09:07 PM rue_mohr: sounds good
09:28 PM rue_mohr: :) OTA update for my teapot, it worked!
09:30 PM rue_mohr: if only I could get the element duty sensor working...