#garfield Logs

Apr 26 2020

01:38 AM rue_mohr: guess I dont change the kernel today
01:44 AM rue_mohr: feel like its 3am
01:44 AM rue_mohr: hmm that means 4 hours of work took 3.5 hours out of me
05:17 AM polprog: rue_mohr: that pn2222 amplifier looks weird to me.. what's the gain? is it inverting?
05:17 AM polprog: i think i understand how it works..
05:18 AM polprog: it doesnt look like a common emitter amp
05:19 AM polprog: ok, i can see how the neg feedback works. good
05:19 AM polprog: clever
09:30 AM rue_bed: self biasing
09:30 AM rue_bed: there is fixed and self biasing for transistor amps
09:30 AM rue_bed: the self biasing is more stable
10:13 AM Tom_L: https://www.youtube.com/watch?v=utDagouxM5U&feature=youtu.be
11:13 AM rue_mohr: yup, its a less compact version
11:13 AM rue_mohr: thats what this fellow was doing, working on improving it
11:13 AM Tom_L: ever hear from the bear anymore?
11:14 AM rue_mohr: nope
12:23 PM nuclearnadal: hi rue
12:29 PM rue_shop3: hi
12:56 PM nuclearnadal: hi, rue_shop3 how are you
05:31 PM Tom_L: rue_shop3, where do i find source for buster kernel after the os is installed?
05:31 PM Tom_L: is that a separate thing?
05:32 PM Tom_L: i'm trying to build RTAI 5.2 from rtai.org on buster
06:01 PM rue_mohr: what kernel version?
06:01 PM rue_mohr: who is nuclear?
06:05 PM Tom_L: huh?
06:05 PM Tom_L: i'm trying to build RTAI 5.2 from rtai.org on buster
06:05 PM Tom_L: whatever default kernel buster has
06:06 PM Tom_L: how do i check?
06:07 PM rue_mohr: I'm not sure
06:07 PM Tom_L: one sec, i'm gonna boot it
06:07 PM rue_mohr: there might be a few kernels btween it stating and finishing
06:07 PM rue_mohr: to find out, run uname -a
06:07 PM Tom_L: it's another test
06:07 PM rue_mohr: zippo:/files/graphics/pictures/2020/temp/twitvid# uname -a
06:07 PM rue_mohr: Linux zippo 5.4.1 #7 SMP PREEMPT Thu Apr 23 17:47:10 PDT 2020 i686 GNU/Linux
06:08 PM Tom_L: 4.19.0-rt-amd64
06:09 PM rue_mohr: ok
06:09 PM rue_mohr: and what kernel do you want?
06:09 PM rue_mohr: I dont know if I understand ya prperly tho
06:09 PM Tom_L: i'm building the latest one from rtai.org which it .2
06:09 PM rue_mohr: the kernel comes form kernel.org
06:09 PM Tom_L: it's rtai instead of preempt-rt
06:10 PM Tom_L: but rtai has modified it
06:10 PM rue_mohr: sure you just select that in the config
06:10 PM rue_mohr: hmm
06:10 PM Tom_L: i'm stupid on the topic but i'm trying to help where i can
06:10 PM Tom_L: no i need to build rtai off the kernel source i think. it keeps asking for the kernel source directory
06:13 PM Tom_L: i downloaded the rtai5.2 source but i think it also needs some from kernel.org. i'm not sure
06:14 PM Tom_L: but i did already download linux-source-4.19 previously so maybe that's what it is looking for
06:16 PM Tom_L: i just thought you might be in the kernel building mood :)
06:19 PM Tom_L: mm that didn't work either
07:25 PM aandrew: Damn, I kind of want it: https://www.basf.com/global/images/about-us/locations/europe/german-companies/b3dps/documents/metals/Ultrafuse_316L_Technical_Data_Sheet_TDS.pdf
07:25 PM aandrew: tl;dr: 3d-printed stainless steel
07:27 PM aandrew: $200 for 3kg
07:28 PM aandrew: boo, looks like you send it away to get debinded
07:28 PM aandrew: debound?
07:47 PM Tom_L: rue_mohr, do you know what lib opensslv.h would be in?
07:51 PM Tom_L: nm
09:08 PM rue_mohr: sorry collapsed for awhile
09:10 PM Tom_L: ran into an error i couldn't fix so i stopped for now
09:10 PM rue_mohr: yea if its a modoifed kernel it could be a zoo
09:11 PM rue_mohr: I'd start by apt-getting the build depenedices for, and compiling the normal kernel
09:11 PM Tom_L: do you know about i-pipe?
09:11 PM rue_mohr: then switch to the modified one
09:11 PM rue_mohr: nope
09:11 PM rue_mohr: instruction pipe I presume?
09:11 PM Tom_L: i've got decent directions for building it
09:12 PM Tom_L: arch/x86/entry/common.c:294:5: error: implicit declaration of function ‘ipipe_root_nr_syscalls’; did you mean ‘ipipe_handle_syscall’? [-Werror=implicit-function-declaration]
09:12 PM Tom_L: https://mail.rtai.org/pipermail/rtai/2019-June/027998.html
09:13 PM Tom_L: i think so
09:14 PM Tom_L: https://github.com/NTULINUX/RTAI/blob/master/README.INSTALL
09:14 PM Tom_L: been using that as a guide
09:36 PM rue_shop3: yup, I'd get the system to build a normal kernel first for sure
11:51 PM polprog: morning
11:51 PM Tom_L: nearly
11:54 PM polprog: I planted some parsley and lettuce two days ago
11:54 PM polprog: tomatos as well