#garfield Logs

Jul 26 2021

12:22 AM rue_mohr: I need to make a valve wheel wrench
12:29 AM rue_mohr: too
12:29 AM rue_mohr: polprog, test question, what is the magic gzip signature bytes
12:41 AM rue_mohr: 1F 8B
03:17 AM polprog: looks like we were dropped
03:17 AM polprog: rue_mohr: i remember looking that up
03:17 AM polprog: but it was complicated, they depended on the compression scheme
03:18 AM polprog: i dont know from the top of my head
03:18 AM polprog: s/scheme/ratio/
03:18 AM rue_mohr: 1F 8B
03:18 AM polprog: or maybe that was for DEFLATE
03:18 AM rue_mohr: 3d printing a pneumatic engine
03:19 AM polprog: cool
03:23 AM polprog: ive re-regsitered #robotics on dal
03:24 AM rue_mohr: ok
03:25 AM rue_mohr: ... didn't I register it?
03:27 AM polprog: maybe, but it disconnected me from a lot of servers overnight and when joined it was empty
04:08 AM rue_shop2: maybe they do dead-wood cleanout on a interval
04:10 AM Tom_L: oh that's right, you're off this week
04:10 AM rue_shop2: yup
04:12 AM rue_shop2: I should have just done the piston on the lathe
04:13 AM rue_shop2: suppose I can while this mess prints
04:13 AM rue_shop2: lets see what I got..
04:13 AM Tom_L: yeah that would be a lathe part as well as the cylinder
04:14 AM rue_shop2: copper pipe
04:15 AM Tom_L: oh
04:15 AM Tom_L: what size?
04:16 AM Tom_L: too bad a pipe cap the next size down wouldn't fit inside it
04:18 AM Tom_L: old shock absorber and cut it to size or a screen door dampener
04:25 AM rue_shop3: hmm
04:25 AM rue_shop3: not looked at those
04:25 AM rue_shop3: will put on list
05:10 AM rue_mohr: 2 3d printers are working on cylinder ends
05:10 AM rue_mohr: I did the piston, the cylinder is a peice of pipe
05:10 AM rue_mohr: its 3am
05:10 AM rue_mohr: I have the piston rod
05:11 AM rue_mohr: I might cnc the alignment thing for the slides
05:12 AM rue_mohr: not completely sure how to do the crank
05:12 AM rue_mohr: going for 1cm
09:54 AM polprog: source [find interface/jlink.cfg]
09:54 AM polprog: transport select jtag
09:54 AM polprog: adapter_khz 1000
09:54 AM polprog: init
09:54 AM polprog: targets
09:54 AM polprog: it works!
10:05 AM polprog: if you set adapter_khz to 1 you can connect a beeper to the jtag lines and hear the bits
10:30 AM rue_mohr: were you able to talk to its jtag?
10:30 AM rue_mohr: whats the ID?
10:49 AM polprog: whose jtag
10:50 AM polprog: i tested on the FPGA board, it detected the tap
10:52 AM rue_mohr: oh
10:52 AM rue_mohr: what about the printer controller?
12:22 PM polprog: I havent gotten around to it, will continue teardown later today
04:40 PM rue_mohr: 1/4" NPT tap drill
04:41 PM Tom_L: 7/16
04:41 PM rue_mohr: sweet
04:42 PM rue_mohr: designing up a bunch of parts to cnc for a small engine
04:42 PM Tom_L: gonna build a locomotive?
04:42 PM rue_mohr: little air engine
04:43 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200335.jpg
04:43 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200337.jpg
04:43 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200344.jpg
04:43 PM rue_mohr: after I suggested it to you I realized I couldn't resist
04:43 PM Tom_L: https://media.istockphoto.com/photos/paper-windmill-pinwheel-colorful-picture-id628220236?s=612x612
04:43 PM Tom_L: air engine
04:43 PM rue_mohr: high pressure!
04:48 PM aandrew: bleh
04:48 PM aandrew: absolutely wiped today and I feel like Idid nothing
04:49 PM aandrew: certainly didn't do any steam engine work, that's craziness, rue_mohr
04:49 PM rue_mohr: :)
04:49 PM rue_mohr: I got the motorbike
04:49 PM aandrew: polprog: welcome to j-link generation
04:49 PM rue_mohr: the big fun is about to go down
04:49 PM aandrew: best debugger I've ever used and that includes the bdi2000 that I thought would be way better than it ended up being
04:49 PM aandrew: waitwhat
04:49 PM aandrew: are you making a steam powered motorcycle?
04:49 PM rue_mohr: no
04:50 PM rue_mohr: I got a motorbike with an engine to turn into a steam engine
04:50 PM polprog: :)
04:50 PM rue_mohr: and a 140A 24V alternator for it to run
04:50 PM polprog: aandrew: its surprisingly sturdy for a clone
04:50 PM polprog: and they didnt put the pinout on it either
04:50 PM aandrew: polprog: yeah the clones are all pretty decent
04:50 PM polprog: it just says "USB >" "< JTAG"
04:50 PM polprog: well thank you i know what goes where, duh
04:50 PM aandrew: rue_mohr: so... I missed the backstory - what is the steam engine for?
04:51 PM rue_mohr: gas is going to $2/L
04:51 PM Tom_L: everybody needs a steam engine!!
04:51 PM rue_mohr: I have a truck I was gonna convert to electric
04:51 PM Tom_L: i've got 2
04:51 PM rue_mohr: screw that, battiers are $20000
04:51 PM rue_mohr: so I'm gonnna convert it to steam
04:51 PM rue_mohr: I need practise, so I'm making steam engines
04:52 PM rue_mohr: you saw the briggs&stratton that was converted?
04:52 PM Tom_L: so short lipo battteries to power the boiler to power the steam engine
04:53 PM rue_mohr: so, I'm working on a small engine thats just 3d printed and stuff
04:53 PM rue_mohr: the motorbike one
04:53 PM rue_mohr: a plasma cnc
04:53 PM Tom_L: so you picked that up today
04:53 PM rue_mohr: yea
04:54 PM rue_mohr: the cpld thing is on standby
04:54 PM rue_mohr: I'm not sure what to do with it next
04:54 PM aandrew: rue_mohr: I saw *something* that kind of ran on steam
04:54 PM rue_mohr: been doing major yard cleanup, took out a load of wood and metal
04:54 PM aandrew: but what are you going to use to generate the steam in the first place?
04:55 PM rue_mohr: wood fired boiler
04:55 PM Tom_L: lipo batteries!
04:55 PM rue_mohr: 10kg wood for 80hp for 1hr
04:55 PM rue_mohr: :)
04:55 PM Tom_L: you should do a gasifier instead
04:55 PM rue_mohr: no
04:55 PM rue_mohr: too complex
04:55 PM rue_mohr: all sorts of junk to go wrong
04:56 PM rue_mohr: steam engines are much much simpler
04:57 PM Tom_L: if it wasn't pouring rain and if it wasn't in the shop attic, i'd take a pic of mine
04:57 PM rue_mohr: I have a weee little one
04:57 PM rue_mohr: two actaully
04:58 PM Tom_L: mine aren't large
04:58 PM rue_mohr: one with a spool valve and one with a tilting cylinder
06:05 PM Tom_L: ok rue_mohr
06:10 PM Tom_L: mine is showing age, it's been sitting for nigh on 40 yrs
06:11 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/Steam_engine/Steam_engine1.jpg
06:11 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/Steam_engine/Steam_engine2.jpg
06:11 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/Steam_engine/Steam_engine3.jpg
06:11 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/Steam_engine/Steam_engine4.jpg
06:11 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/Steam_engine/Steam_engine5.jpg
06:11 PM Tom_L: you can probably tell which is the grandson's and grandfather's :)
06:14 PM Tom_L: bits of mine are missing
06:18 PM rue_mohr: !?!?! I just got a random fan mail package???
06:19 PM Tom_L: warn't me
06:22 PM rue_mohr: I'm not sure who its from
06:22 PM Tom_L: what country?
06:23 PM rue_mohr: usa
06:23 PM rue_mohr: I want to take a pic before I open it and I cant find the camera
06:23 PM Tom_L: careful, might be the last pic you take
06:25 PM rue_mohr: its ok, I'm short on bomb parts :)
06:29 PM rue_mohr: hah! its from the fellow who sent me the decoded hex displays!
06:29 PM Tom_L: cool
06:31 PM polprog: oh nice
06:31 PM polprog: whats inside
06:31 PM polprog: im getting some power transistors from a friend
06:31 PM polprog: and temperature regulators
06:32 PM polprog: i have to send you both something hmm
06:33 PM rue_mohr: tonnes of stuff
06:35 PM polprog: i didnt get round to doing that printer today
06:35 PM polprog: :/
06:35 PM polprog: i was hoping i can clear it because that package coming in is 25 kilos >_>
06:35 PM polprog: jeez. too much stuff for a flat
06:35 PM polprog: need a spare flat, or a house in a forest
07:24 PM rue_mohr: I have 11 printers on the deck
07:24 PM rue_mohr: so, yea
08:38 PM Tom_L: got quiet
08:44 PM rue_mohr: visitors
08:44 PM rue_mohr: brought me some stainless pipe that might be good for cylinders
08:45 PM rue_mohr: oh and sorting all these goodies
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200350.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200351.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200352.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200353.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200354.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200356.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200357.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200360.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200363.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200365.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200367.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200369.jpg
08:46 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200374.jpg
08:47 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200376.jpg
08:47 PM rue_mohr: erm, how many does that directory keep?
08:47 PM rue_mohr: oops I think its only `0
08:47 PM rue_mohr: 10
08:48 PM rue_mohr: fixed
08:50 PM Tom_L: pile of goodies
09:01 PM aandrew: ooh that reminds me of the laser I got working yesterday
09:04 PM aandrew: still only class IIIR but I wasn't taking (m)any chances
09:04 PM aandrew: https://ibb.co/1Jf01w5
09:04 PM aandrew: https://ibb.co/fnS2W6h
09:04 PM aandrew: that is uncollimated, just shining up at the ceiling and the sharp edges are my microscope blocking it
09:04 PM aandrew: that's about 80mA of drive current, 5.2V Vf
09:29 PM rue_mohr: ooo
11:11 PM aandrew: blah
11:11 PM aandrew: I can't find a termoelectric module thinner than 1mm
11:12 PM aandrew: 2.5ish-mm is the smallest I can find
11:17 PM aandrew: 2.3mm thick would work if I cut a hole in the PCB, that gives me another 1.6mm which means it'll be 0.7mm above the surface of the board which is pretty damn close to what I need
11:24 PM rue_mohr: complex
11:24 PM rue_mohr: ok, steam engine from motorbike, part 1
11:24 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200377.jpg
11:24 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200379.jpg
11:24 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200381.jpg
11:24 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200383.jpg
11:24 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1200384.jpg
11:32 PM aandrew: dude
11:32 PM aandrew: wtf happened to that bike before you got it
11:32 PM rue_mohr: not sure
11:33 PM aandrew: looks like it was set on fire and someone beat the fire out with a crowbar
11:34 PM rue_mohr: maybe
11:34 PM rue_mohr: I think its been moved a few times with an excavator too
11:41 PM aandrew: heh looks like it
11:42 PM aandrew: also, looks like TES1-03108 is more or less ideal. 6.6mm square, 2.4mm thick. Cut a 7mm square hole in the PCB and put it in there, glueing it down
11:49 PM rue_mohr: what needs the active cooling?
11:54 PM aandrew: an image sensor
11:54 PM rue_mohr: ah
11:54 PM rue_mohr: video