#garfield Logs

Nov 18 2020

03:37 AM polprog: hmm, my mech prof sent me a nice article about analog computers
03:43 AM polprog: also
03:43 AM polprog: https://www.aliexpress.com/item/1005001482520909.html
03:43 AM polprog: i got two of these
03:43 AM polprog: they also have these weird PCI cards, i wonder how hackable they are as general use IO cards, i have no idea how would i even approach hacking one
03:43 AM polprog: https://www.aliexpress.com/item/32373828089.html
08:06 AM rue_mohr: I'v seen a buz around those cards
08:07 AM rue_mohr: I think people are running them thru Pi s
09:20 AM rue_mohr: --
11:28 AM aandrew: polprog: those are on my list, but haven't pulled the trigger on them
11:29 AM polprog: maybe they will come in dec
11:29 AM polprog: i dont remember the shipping time
11:29 AM polprog: twoo weeks i think
11:29 AM polprog: my mech prof sent me a schematic and a manual for an analog computer
11:30 AM aandrew: there's an *awesome* US Navy series on mechanical computers
11:30 AM aandrew: let me dig that up
11:30 AM aandrew: https://www.youtube.com/watch?v=gwf5mAlI7Ug
11:30 AM aandrew: but there's lots more on youtube
11:30 AM polprog: i havent opened it yet but i did ask him about these (he mentioned them in the largrange eqn lecture, where he showed how to work out w= 1/sqrt(LC) for a tank ckt
11:31 AM polprog: ahh, i know this one. awesome
12:40 PM rue_mohr: did they use switching amplifiers to remove drift?
12:40 PM rue_mohr: er, what do they call them
12:48 PM Tom_L: 40mph wind :/
12:48 PM Tom_L: https://earth.nullschool.net/#current/wind/surface/level/orthographic=-100.81,36.29,1979/loc=-98.573,37.975
12:49 PM rue_mohr: its interesing flipping thru my photolog
12:49 PM rue_mohr: I can see that I keep running into problems on projects, taking a detour to solve it, and forgetting to come back to the base project
12:50 PM rue_mohr: I was working on a motor driver
12:50 PM rue_mohr: I needed a 12V->24V booster
12:50 PM rue_mohr: (so I made a bunch)
12:50 PM rue_mohr: but I was having issues with the oscillators for them, so I took a detour to that
12:56 PM aandrew: rue_mohr: "running into problems on projects, taking a detour to solve it, and forgetting to come back to the base project" -- story of my entire life
12:56 PM aandrew: infinite stack depth
01:01 PM rue_mohr: this has been a really cool your for new circuits tho
01:03 PM rue_mohr: using pin 3 for the 555 feedback and learning pin 4 floats high all on its own
01:30 PM aandrew: yeah you've really done some deep dives on that part
02:30 PM polprog: https://twitter.com/MakitaTools/status/1329123693872640000
02:30 PM polprog: rue_mohr: oh boy, i remember you were making that driver
02:31 PM polprog: no, in the design i was sent the amps need to be zero adjusted
02:31 PM polprog: which kinda sucks
02:33 PM polprog: its in EPE
02:33 PM polprog: i can send it to you
02:37 PM polprog: http://0x0.st/i5tq.pdf
02:37 PM polprog: http://0x0.st/i5tT.pdf
03:05 PM rue_mohr: hu?
03:06 PM rue_mohr: thats a makita tools post?
03:06 PM rue_mohr: or you mean a motor driver
03:07 PM rue_mohr: I finished two motor drivers, and a controller for them
03:07 PM rue_mohr: their in the mirror control box
03:07 PM rue_mohr: its missing a control stick
03:08 PM rue_mohr: huh
04:08 PM Tom_L: rue_mohr, how's the cnc coming along?
04:08 PM Tom_L: haven't heard much about it lately
05:25 PM polprog: rue_mohr: both
05:25 PM polprog: that makita is pretty nice
05:26 PM polprog: and yeah i remember now, all our oscillator fun was because of you making boot converters
06:04 PM rue_mohr: its not I'm trying to make space on the deck
06:05 PM rue_mohr: polprog, :)
06:05 PM rue_mohr: might as well get a problem solved
06:05 PM rue_mohr: funny that the 555 wins for lowest parts count
06:10 PM polprog: :P
06:13 PM polprog: https://pbs.twimg.com/media/EnJRSuZXMAI9LRd?format=png&name=medium
06:27 PM rue_mohr: :)
06:28 PM Tom_L: wonder if z went overseas
06:48 PM aandrew: that's pretty funny polprog
06:48 PM polprog: :)
06:48 PM polprog: goodnight :)
07:29 PM rue_shop1: he has youtube posts after he said goodbye..
07:30 PM Tom_L: buffered :)
10:00 PM rue_mohr: I'll see if the old blackberry board is still in the trash
10:00 PM rue_mohr: it might have a rom chip