#garfield Logs
Apr 29 2020
#garfield Calendar
12:00 AM Tom_L: for me i agree wholly
12:05 AM rue_mohr: yup, they should already have one
12:05 AM rue_mohr: which kernel is it?
12:10 AM rue_mohr: 4.9.1?
12:15 AM Tom_L: 4.19.114
04:52 AM zhanx_ is now known as zhanx
08:35 AM zhanx: morning
09:31 AM rue_mohr: ok I'm off to work
10:37 AM Tom_L: later
10:37 AM zhanx: sup
10:37 AM Tom_L: building kernels
10:38 AM zhanx: Training AI
10:40 AM Tom_L: fun
10:41 AM zhanx: not really
10:42 AM zhanx: really its boring
10:57 AM Tom_L: odd one build was good but the other one wasn't, 2 PCs same build
10:58 AM zhanx: still doing kernels?
10:59 AM zhanx: i was helping in #ubuntu due to a distro release
11:06 AM Tom_L: gonna build linuxcnc on one next
11:07 AM zhanx: nice
11:07 AM zhanx: 2,525,326 tests
11:07 AM zhanx: zero passes
11:07 AM Tom_L: it's all just a test to see how buster works with rtai
11:07 AM zhanx: which that needs
02:37 PM polprog: hmm, i should characterize the dual diodes i have as varicaps.. and make some VCFs
02:39 PM Tom_L: q
02:39 PM polprog: qq
02:39 PM Tom_L: wondering if any i5 i7 will fit in any mb with i5 socket
02:39 PM Tom_L: or do # of cores affect that
02:40 PM polprog: iirc some dell laptops were fried by putting an i7 in place of i5, even when they should work
02:40 PM polprog: but then, those were dell laptops
02:40 PM polprog: ;)
02:40 PM Tom_L: i need to see what's in my spare mb
02:40 PM Tom_L: it might be an i7 but i'm not entirely sure
02:42 PM Tom_L: looks like you can get 6 cores on an i5 and up to 12 on an i7
02:43 PM Tom_L: https://www.extremetech.com/wp-content/uploads/2017/09/Intel-8thGen.jpg
03:10 PM rue_mohr: zhanx, tests?
03:11 PM rue_mohr: polprog, you saw my list of devices, right?
03:11 PM polprog: yes, but i dont think i saved it
03:11 PM polprog: did you post it on twitter or your server?
03:11 PM rue_mohr: well I aint diggin thru twitr to find it
03:12 PM polprog: it belongs in irc junk
03:12 PM rue_mohr: yike, I tried to cd into a future directory of images, glad that didn't work
03:13 PM polprog: future directory?
03:13 PM rue_mohr: yea
03:13 PM polprog: like.. what
03:13 PM Tom_L: rue_mohr, how can i check the kernel version other than uname?
03:14 PM rue_mohr: dmesg
03:14 PM Tom_L: i had to keep the name due to other programs
03:14 PM rue_mohr: polprog, I'v only aken 1130 pictures so far this year, I'll go thru those
03:14 PM Tom_L: would it show any different with patches applied?
03:15 PM rue_mohr: probably not
03:16 PM Tom_L: i renamed it xxx-rtai the first time and linuxcnc didn't like that when i went to compile
03:16 PM rue_mohr: correct
03:16 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1150607.jpg
03:16 PM rue_mohr: ^ polprog
03:17 PM polprog: thanks
03:17 PM rue_mohr: what you can derive from it, is the capacitance ratio over the 17v range I used
03:17 PM polprog: that shows freqs.. what was the test rig? hct14 oscillator or what?
03:18 PM rue_mohr: the lower the % on the right, the better
03:18 PM rue_mohr: dont recall the test circuit
03:18 PM rue_mohr: it looks like the 2SC5027 won
03:18 PM polprog: the percentage is what?
03:18 PM rue_mohr: low freq as a % of high freq
03:18 PM polprog: ok
03:18 PM rue_mohr: but also the capacitance variation
03:18 PM polprog: right, i see
03:19 PM rue_mohr: so, that transistor, is 4:1 capacitance range
03:19 PM rue_mohr: E13007 is good, its found in PC power supplies
03:20 PM polprog: hmm, youre right, i havent thought about transistors as dual diodes...
03:20 PM rue_mohr: ditto the 2SC4242
03:20 PM rue_mohr: according to that I was using the C - B junction
03:20 PM polprog: that 5027 is a HV transistor
03:21 PM rue_mohr: anyhow, thats what I tried
03:21 PM rue_mohr: I was trying to do a 1Mhz - 10Mhz VCO
03:21 PM polprog: ill go and try the bc547..
03:22 PM rue_mohr: which is apparently "an insane range"
03:22 PM polprog: yeah you told me.. i could use a vco
03:22 PM polprog: damnit so many cool analog stuff to build and so little time
03:22 PM rue_mohr: I got a few things to do it, I think they were both RC
03:22 PM rue_mohr: polprog, yea, everything I build now seems to sprout two more ideas
03:23 PM rue_mohr: I was avoiding hetrodyne at the time
03:23 PM rue_mohr: the freqs you need to hetrodyne a result of 10Mhz is kinda crazy
03:23 PM rue_mohr: I ended up getting the chips tho
03:24 PM rue_mohr: I was also having stability issues
03:24 PM rue_mohr: one of my best circuits was changing by 3khz when i _WALKED UP TO IT_
03:24 PM rue_mohr: !?!?!?!?!?!
03:24 PM polprog: heteordyne.. f1+f2 & f1-f2
03:24 PM polprog: haha
03:25 PM rue_mohr: yea, I was like "I could shield the hell outa this, or, use soemthing else"
03:25 PM rue_mohr: the DSS module I got from china worked AWESOME
03:25 PM polprog: i know, this will be a good excuse to finish the calculations on the opamp relaxation osc
03:25 PM rue_mohr: hmm
03:26 PM polprog: they are simple ofc but it was late
03:26 PM rue_mohr: I wonder if I should break up those google drive posts and refresh the oscillator section
03:26 PM rue_mohr: hey, I have a notion for a book
03:26 PM rue_mohr: I have a book called "solid state pulse circuits"
03:26 PM rue_mohr: and its good, but a real let-down for its name
03:27 PM rue_mohr: I want to make a pulse circuits book
03:27 PM rue_mohr: with like, EVERYTHING to do with pulse circuits
03:27 PM polprog: i want to have page on file, where theresa relax osc based on an opamp (lm324) in this case, and i can look up the freq eqn and have RC values to pick from
03:28 PM polprog: i think i either have, or i know where is (gramps' flat) a book on pulse circuits like that
03:28 PM polprog: its probably about power pulse circuts (he designed induction furnances)
03:30 PM rue_mohr: http://ruemohr.org/~ircjunk/images/p1150868.jpg <-- tell me what you think of the index so far?
03:31 PM polprog: looks good
03:31 PM polprog: very broad. impressive
03:32 PM rue_mohr: its kinda a guide to things I need to add to my library for now
03:32 PM polprog: nice, i found in my uni notes a direct derivation of U(t) for an rc ckt
03:33 PM polprog: imma copy that
03:34 PM rue_mohr: er
03:34 PM rue_mohr: I wrote an RC program in C
03:35 PM rue_mohr: it was pretty close
03:37 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/RC1uF10k.png <-- my program results
03:37 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/scope2.png <-- real world
03:38 PM rue_mohr: my idea was to simulate a 1 bit ADC on an avr, and use a real dac with it
03:39 PM rue_mohr: code could use some comments
03:39 PM polprog: pretty close
03:39 PM polprog: did you do it from the formula or numerically
03:40 PM rue_mohr: posting source...
03:41 PM rue_mohr: http://ruemohr.org/~ircjunk/programming/c/rc2/
03:43 PM polprog: hmm
03:43 PM rue_mohr: if you can successfully clean up that formula for both charge and discharge, I'd be greatfull
03:43 PM rue_mohr: there is a way I cant get my head around it
03:43 PM polprog: i can try.. its a useful starting base for a utility RC calc
03:43 PM rue_mohr: well, and its right
03:43 PM polprog: yup
03:43 PM rue_mohr: can you see how main works?
03:44 PM rue_mohr: you set up your properties and walk thru time with it?
03:44 PM polprog: yeah
03:44 PM polprog: its pretty well done
03:44 PM rue_mohr: :) thanks
03:44 PM rue_mohr: its just a test for the things I wanted to use it for
03:44 PM polprog: ever since i help friends with C my ability to instanly read and spot mistakes in C has greatly improved
03:44 PM rue_mohr: heh
03:45 PM rue_mohr: RCLP Resistor Capacitor Low Pass
03:47 PM rue_mohr: it should be possable to generate 1 bit audio streams with it that you can just play back thru an RC filter
03:47 PM polprog: let me finish the relax osc
03:47 PM rue_mohr: hah
03:47 PM rue_mohr: but! hetrodyne!
03:47 PM rue_mohr: :)
03:47 PM polprog: i have upper and lower bound voltages.. and i need to calculate the period
03:47 PM polprog: i got V(t), i need t(V)
03:47 PM rue_mohr: ok
03:47 PM rue_mohr: the other way 'round then
03:48 PM polprog: someone hid the t in the exponent of e
03:48 PM polprog: cruel..
03:48 PM polprog: :P
03:48 PM polprog: t'was me
03:48 PM rue_mohr: Vt = Vc0 + (E-Vc0)*(d^(-1/RC))
03:49 PM rue_mohr: I'd just use wolfram alpha to turn it inside out
03:49 PM polprog: heh, i think ill do so
03:50 PM rue_mohr: result might be ugly
03:50 PM rue_mohr: hmm wait a min..
03:50 PM polprog: its got i in it, but thats for n in Z..
03:50 PM polprog: i think i can just assume n=0 in this case
03:50 PM polprog: https://www.wolframalpha.com/input/?i=v+%3D+E%281-exp%28-t%2FRC%29%29+find+t
03:50 PM polprog: "log(x) is the natural logarhitm"
03:50 PM polprog: im going to slap someone
03:51 PM polprog: t(V) = RC(ln(1/(e-V_0)) + 1 )
03:52 PM rue_mohr: t = R*C*lm((E-E0)/(E-Emax))
03:52 PM rue_mohr: t = R*C*ln((E-E0)/(E-Emax))
03:52 PM rue_mohr: are those the same
03:52 PM rue_mohr: ?
03:52 PM polprog: hard to say at first glance
03:52 PM rue_mohr: t = T *ln (Efinal/Einitial)
03:53 PM rue_mohr: ( T = RC )
03:54 PM polprog: wheres e in that ln
03:54 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1150870.jpg
03:55 PM rue_mohr: ? helping?
03:56 PM polprog: yeah, i expect to get something like that
03:58 PM polprog: i got t = RC* | ln( (e-v2)/(e-v1) ) |
03:58 PM rue_mohr: t = R*C*ln((E-E0)/(E-Emax))
03:58 PM rue_mohr: E(-Eo-Emax)
03:58 PM rue_mohr: er no
03:59 PM polprog: looks the other way round (v2 > v1) in my case
03:59 PM rue_mohr: sure
03:59 PM rue_mohr: the ABS is odd, but ok
03:59 PM polprog: and i still cant see the natural log base e
03:59 PM polprog: the abs is there cause i wasnt sure whether to take t(v1) - t(v2) or the other way round
04:00 PM rue_mohr: ok
04:00 PM rue_mohr: well, why dont you run numbers against my graphs
04:00 PM rue_mohr: mine are for 1uF and 10k
04:00 PM rue_mohr: as its a solved point to test against
04:01 PM polprog: i will..
04:01 PM polprog: big image warning
04:01 PM polprog: https://i.ibb.co/rdwsPDx/IMG-20200429-225931.jpg
04:01 PM polprog: i wanna find the period of that
04:01 PM rue_mohr: tahts correct
04:01 PM rue_mohr: good you got the real high and low votlages
04:02 PM polprog: yeah, i measured them beforehand
04:02 PM polprog: more than a month ago :D
04:02 PM rue_mohr: so, you want to enter the desired freq and it'll tell ya the R/C?
04:03 PM polprog: yeah, i wanna have the formula for that on that drawing
04:03 PM polprog: im close
04:03 PM polprog: i think for the RCLP it could take R, C and print a bunch of figures like the knee point, 66% and 10-90% rise time, fall times
04:03 PM polprog: etc etc
04:04 PM polprog: all the figures that could be useful in a couple of lines on stdout
04:04 PM rue_mohr: it should be 1/kRC
04:04 PM polprog: what should be?
04:04 PM rue_mohr: where k should be constant for the circuit given the schmidtt characteristics
04:04 PM rue_mohr: f
04:04 PM polprog: hmm,
04:04 PM rue_mohr: f = 1/kRC
04:04 PM polprog: makes sense
04:05 PM polprog: k will be ugly
04:05 PM rue_mohr: f = k/RC if you like, too
04:05 PM rue_mohr: you might be abel to just sniff out k
04:05 PM rue_mohr: I wonder
04:05 PM aandrew: Tom_L: look up the CPU support for the specific motherboard (including rev.) and BIOS
04:05 PM polprog: i think what i could do later is to use a different opamp, find min/max voltages and have a list of k's for each amp
04:05 PM polprog: that will be handy
04:05 PM rue_mohr: your going to set R1, 2, 3 for this, or make it part of the formula?
04:05 PM aandrew: my 1st-gen i7 motherboard still has some modern CPU support it seems, which is frankly astonishing
04:06 PM polprog: i think ill make it a part of the formula
04:06 PM rue_mohr: k
04:06 PM aandrew: wow, the i7-8700 has simlar TDP to i3-8100?
04:07 PM polprog: lets think if i can drop the abs.. iv v2 > v1 then e-v2 < e-v1, so the fraction is < 1, so the log is... < 0
04:07 PM rue_mohr: according to the 74HC14 datasheet, k is completely dependent on the high and low trip points
04:07 PM polprog: something feels wrong
04:07 PM polprog: why am i subtracting voltage from e (unitless)
04:07 PM rue_mohr: f = 1 :)
04:08 PM polprog: crap
04:08 PM polprog: wait
04:08 PM polprog: wolfram did mark capital E as stylized e
04:08 PM polprog: its not e the 2.71
04:08 PM polprog: ok
04:09 PM polprog: so small E in there is the variable V
04:09 PM polprog: now its good
04:09 PM polprog: now it makes sense
04:10 PM rue_mohr: 16 notifications?
04:10 PM rue_mohr: what did i say now?
04:10 PM rue_mohr: twitter image for you
04:11 PM rue_mohr: I need to make my temp image poster handle pngs
04:11 PM polprog: ok, so your formula was okay
04:11 PM rue_mohr: tahts odd
04:11 PM rue_mohr: twitter just had a huge hicku
04:11 PM rue_mohr: p
04:11 PM polprog: i got t(v1, v2) = -RC ln([v0-v2]/[v0-v1])
04:12 PM rue_mohr: wow
04:12 PM rue_mohr: twitter oopsed.
04:12 PM polprog: which makes sense since in yours the fraction is upside down so the - is gone
04:13 PM rue_mohr: ah, is that why I have to use a modified version for discharge?
04:14 PM polprog: maybe
04:14 PM polprog: ok, so if i want f = 1/k RC
04:15 PM rue_mohr: k = ln([v0-v2]/[v0-v1])
04:15 PM rue_mohr: -
04:15 PM rue_mohr: :)
04:15 PM polprog: quite close
04:15 PM polprog: k = 2 ln(...)
04:15 PM polprog: the period is charge + discharge
04:15 PM rue_mohr: and the 3 votlages are you schmitt points
04:15 PM polprog: actually
04:16 PM polprog: wrong.. the discharge time isnt the same as charge, or is it
04:16 PM rue_mohr: see the twitter I'm age I @'d ya
04:16 PM rue_mohr: ?
04:16 PM polprog: yep
04:16 PM rue_mohr: hmm, it depends on how the trip votlages are set up
04:17 PM rue_mohr: they say only t2 depends on vcc
04:17 PM polprog: t1 is discharging
04:17 PM polprog: yeah, makes sense
04:18 PM rue_mohr: but if the wave isn't centered, the times will differer
04:18 PM polprog: ok, so that what i just calculated is t1
04:18 PM polprog: yep
04:18 PM rue_mohr: casue the potential across the resistor wont be consistent
04:18 PM polprog: question is.. if R1 = R2 on my pic, is the wave centered
04:18 PM rue_mohr: yes
04:18 PM polprog: great. so if R1 = R2 then i can have this simpler formula
04:19 PM rue_mohr: so you need to express the trip points as a fn of the divider impedence and R3
04:19 PM polprog: i got that, v1 v2 on the lower right corner of the page
04:38 PM polprog: the values for v1, v2 dont make sense..
04:44 PM polprog: tricky
04:45 PM polprog: discharging is between V2 and V1, but the V0 for discharge is the low output of the opamp
04:45 PM polprog: charging is between V1 -> V2, but V0 is then Vh, high output of the opamp
04:46 PM polprog: so currently, the formula is, Tcharge = RC ln( VH/VL * (VL-V2)/(VH-V1) )
04:46 PM polprog: and idk what sign that ln will be
04:59 PM rue_mohr: well, if there are only two possabilites, try them!
05:00 PM polprog: well, i redrawn even bigger waveforms, and went even more into details
05:01 PM polprog: so far i have... charge time = RC ln (V1 - VH)/(V2-VH)
05:01 PM polprog: discharge time = RC ln(V2-VL)/(V1-VL)
05:02 PM rue_mohr: sorry I cant thin much
05:02 PM polprog: total period would be RC ln [ (V1-VH)*(V2-VL) ] / [ (V2-VH)*(V1-VL) ]
05:02 PM polprog: itsok, me neither
05:02 PM polprog: this seems more right
05:03 PM polprog: what i dont like is why the picture you @'ed me has got Vcc-Vt in the fraction
05:03 PM polprog: so charge voltage - trig voltage
05:03 PM polprog: while i have trig-charge in my equations
05:09 PM polprog: oh shit
05:09 PM polprog: my t(V) seems to be wrong
05:09 PM polprog: i just did it by hand
05:09 PM polprog: its different from what wolfram gave me
05:09 PM polprog: because i plotted what wolfram gave me on the ti83
05:09 PM polprog: that didnt make sense..
05:10 PM rue_mohr: hmm
05:10 PM rue_mohr: did wolfram take one of the letters as soemthing special and mess up?
05:10 PM polprog: maybe
05:11 PM polprog: but this formula makes sense
05:12 PM polprog: t(V) = -RC ln (V0-V)/V0
05:13 PM polprog: and now i have V0 - something, just like the hct14 equations
05:16 PM rue_mohr: ok
05:16 PM rue_mohr: thoguht it would be a good guide
05:19 PM rue_mohr: hmm
05:19 PM rue_mohr: are you missing a param
05:20 PM rue_mohr: if you want to know the time for it to get to a voltage, should you say the startvoltage and end votlage, but the initial capacitor votlage
05:21 PM polprog: if you wanna know the time between V1 and V2, you also need to have V0, which the voltage at the top of the RC totem (so E in http://ruemohr.org/~ircjunk/tempimage/p1150870.jpg )
05:22 PM rue_mohr: I'm wondering if I should write soemthing that doesn't assume a low pass setup with the capacitor on the bottom
05:23 PM rue_mohr: becasue then I could use it for high pass too
05:24 PM polprog: sent a photo on twitter
05:24 PM rue_mohr: yea, the 1 bit adc I was gonna do, used a set slice time, if I wanted to do one that wasn't statically clocked, I'd need your time calcs
05:25 PM rue_mohr: 8-\ why doesn twitter say 20 comments...
05:25 PM polprog: yeah so that on the bottom is "what time will it take to charge a cap to V, powering the RC wit hV0)
05:25 PM polprog: with V0 *
05:25 PM polprog: trivial to get to rise time between V1 and V2 powered by V0
05:25 PM rue_mohr: tiwtters, "I read this" isn't working (worse than it wasn't working before)
05:28 PM rue_mohr: ok, thats charge time, then
05:29 PM polprog: ok, i think ill clean up the bed (its covered in cables) and go to sleep
05:29 PM polprog: or, flip the notebook page and do the discharge time
05:29 PM rue_mohr: I want to work on this, but I just cant think
05:30 PM polprog: i have to get up tomorrow, carry my tax forms to the post office and be thinkng at 10:00 to take part in the remote classes
05:30 PM polprog: choces.. choices...
05:32 PM polprog: was setting up an IP camera over my bench today
05:32 PM polprog: on tuesday im gonna be streaming, teaching kids not much younger than me the basics of electronics
05:32 PM polprog: multimeter, breadboard, all that jazz
05:33 PM rue_mohr: cool
05:33 PM polprog: its amazing how good the image quality from this bosch camera is
05:33 PM polprog: its a CCTV unit and the lens is amazing... 160 degree FOV on the widest setting easily
05:35 PM polprog: ok, ive reached the "Charge time" equation in http://ruemohr.org/~ircjunk/tempimage/p1150870.jpg
05:35 PM polprog: thats good
05:35 PM polprog: very good
05:37 PM polprog: http://ruemohr.org/~ircjunk/images/338_avrstation.jpg
05:37 PM polprog: what was this taken with
05:37 PM polprog: and when
05:44 PM rue_mohr: first gmeeraton webcam
05:44 PM rue_mohr: "640x480" but honestly all made up numbers
05:44 PM polprog: yeah the sharpening algorhitm butchers that pretty much
05:44 PM rue_mohr: I think thats freebee1
05:44 PM rue_mohr: the first of the workstations
05:45 PM polprog: what did it run?
05:45 PM rue_mohr: just linux
05:45 PM rue_mohr: I thinkI was using it for microcontroller dev
05:45 PM rue_mohr: that would be a breadboard at the back right there
05:48 PM polprog: cool
05:48 PM polprog: what year could that be?
05:48 PM rue_mohr: ~2002
05:48 PM polprog: wow
05:48 PM polprog: i was 2 then
05:48 PM polprog: 28 may 2000
05:49 PM rue_mohr: hmm
05:54 PM polprog: nighters
05:56 PM rue_mohr: -rw-rw-rw- 1 1010 1010 216321 Dec 30 2004 /files/backup/t0001/ircjunk_old/public_html/338.jpg
06:37 PM Tom_L: soooo
06:37 PM Tom_L: what's up?
07:06 PM rue_mohr: the printer
07:06 PM rue_mohr: had one of the pipes that couples the Z motor to the threaded rod drop off
07:07 PM rue_mohr: which caused the head to plough thru enough plastic to make it come loose
07:07 PM rue_mohr: and broke a gear on the X drive
07:07 PM rue_mohr: its all fixed up, roughly adjusted
07:07 PM rue_mohr: testing
07:08 PM rue_mohr: instead of a ziptie to hold the pipe on, I gave it a grub-screw enabled collar
07:08 PM rue_mohr: bit right thru the pipe onto the motor shaft
07:08 PM rue_mohr: it should stay now
07:16 PM Tom_L: how can you determine the load rating on a transformer?
07:22 PM rue_shop1: ouch, not sure
07:22 PM rue_shop1: ballpark by winding size
07:23 PM rue_shop1: ballpark VA by core size
07:23 PM Tom_L: well, i've got those 3 in the mill box but i _think_ i really only need one
07:23 PM Tom_L: they were marked 6A
07:23 PM rue_shop1: ok, well 6A it is
07:23 PM Tom_L: i doubt i pull that much at any given time from all 3 steppers
07:24 PM rue_shop1: dont forget that the drivers are constant power
07:24 PM Tom_L: they were either marked or the guy told me that
07:24 PM rue_shop1: if they put 1V@9A into the stepper, thats only 9w
07:24 PM Tom_L: would an ammeter be a good judge of that?
07:24 PM rue_shop1: so its only 1/4 for a 36V supply
07:24 PM Tom_L: 48v
07:25 PM Tom_L: i considered a cleanup on that box but it's working too good to mess it up i guess
07:25 PM rue_shop1: you get my point thro, right?
07:25 PM Tom_L: yeah
10:02 PM rue_mohr: yes!
10:02 PM rue_mohr: the dc-dc works
10:02 PM rue_mohr: 12->24V good at 48mA
10:03 PM Tom_L: yay
10:03 PM Tom_L: good something works
10:03 PM Tom_L: nothing but struggle with this experiment
10:05 PM Tom_L: you back on full days yet?
10:09 PM rue_mohr: there isn't enough work for full
10:09 PM rue_mohr: I'm actaully struggling to fill a few half days
10:10 PM rue_mohr: today was supposed to be a half, and the jobs both finished quick
10:13 PM Tom_L: i think things are gonna take quite a while to wind back up
11:06 PM rue_mohr: when is the election?
11:07 PM Tom_L: dunno but don't see the coorelation
11:08 PM rue_mohr: no, but when it is?
11:08 PM Tom_L: november 2 whatever year
11:09 PM rue_mohr: nov!?
11:09 PM rue_mohr: why did they start all the campaining???
11:09 PM Tom_L: actually it's always the 1st tuesday after the 1st
11:10 PM Tom_L: the democrats are making fools of themselves
11:11 PM Tom_L: even so much as to not want the president to sign the relief checks
11:11 PM Tom_L: and when the gal in the house tore up his speech
11:11 PM Tom_L: rather childish
11:12 PM Tom_L: https://www.youtube.com/watch?v=GR5Z6bKRp9A
11:13 PM rue_mohr: hows your kernel project going?
11:13 PM Tom_L: ok i did 2
11:13 PM rue_mohr: 2?
11:13 PM rue_mohr: you did the same twice or two different versions?
11:13 PM Tom_L: the first one i added -rtai to the end of the kernel name in the settings
11:13 PM Tom_L: it compiled and ran
11:14 PM Tom_L: i'm unable to compile linuxcnc on it because of the name change
11:14 PM rue_mohr: https://twitter.com/RueNahcMohr/status/1255695332697976832/photo/1
11:14 PM Tom_L: some libs don't like it
11:14 PM rue_mohr: k
11:14 PM Tom_L: the 2nd one i think compiled but i can't tell because the name is the same as the original
11:14 PM Tom_L: and i'm having dependency issues with the linuxcnc compile on it
11:14 PM rue_mohr: I need to figure out, its too easy to post images and videos to twitter
11:14 PM rue_mohr: k
11:15 PM rue_mohr: compiling something like linuxcnc is a mountian of dependencies
11:15 PM Tom_L: the guy admitted i didn't need debs but that's how they plan to distrubute it
11:15 PM rue_mohr: I often say that the only person who can compile a project like that, is the dev
11:15 PM rue_mohr: yea
11:15 PM Tom_L: takes about the same amount of time either way
11:16 PM Tom_L: well, they've been doing alot of editing on the linuxcnc source lately
11:16 PM rue_mohr: I wonder why the normal realtime stuff in the linux kernel isn't sufficient
11:16 PM Tom_L: i'm not sure if master is broke or not and they've separated version 2.8 out of it aparently
11:16 PM Tom_L: i can't check out anything but master
11:17 PM rue_mohr: its time to go to bed
11:17 PM rue_mohr: but I want to work on this motor driver more
11:17 PM Tom_L: hardware acts different with different rt schemes
11:17 PM rue_mohr: now that I have the 24V supply, the rest is "easy"
11:17 PM Tom_L: i'm just doing it to kill some time
11:18 PM rue_mohr: I like grbl for that, it doesn't have to try to be an OS too
11:18 PM Tom_L: maybe learn something along the way
11:18 PM Tom_L: doesn't do near as much though
11:18 PM Tom_L: it has it's place
11:18 PM rue_mohr: I know
11:19 PM Tom_L: personally having run big machines i would be dissapointed with it
11:19 PM rue_mohr: the fpga stuff gets it closer to where it needs to be to use a PC
11:20 PM rue_mohr: If i were using a more complex CAM program, grbl wouldn't even be an option
11:20 PM Tom_L: i'll likely go back to work on the 4th
11:20 PM rue_mohr: k
11:20 PM Tom_L: i offered you one
11:20 PM Tom_L: but it's windows
11:20 PM rue_mohr: yea its ok, thankyou
11:20 PM Tom_L: full blown 3d
11:20 PM rue_mohr: windows
11:21 PM Tom_L: my first copy of it was DOS
11:21 PM rue_mohr: (said, the one I use now is windows)
11:21 PM rue_mohr: I will probably try to do my own again
11:21 PM rue_mohr: I would have done fine if not for the gui libraries I was using
11:21 PM Tom_L: you probably wouldn't like this one anyway. it's pretty old tech
11:21 PM rue_mohr: they were made for much simpler applications
11:21 PM Tom_L: all wireframe, no solids
11:22 PM Tom_L: but can import solids
11:22 PM rue_mohr: mastercam would be way more than enough for what I do
11:22 PM Tom_L: i'd say so
11:22 PM rue_mohr: I go from 2d profiles
11:22 PM rue_mohr: "pocket" "cut inside" "cut outside"
11:23 PM rue_mohr: grbl doesn't support drill cycles
11:23 PM Tom_L: i did that round cube with one pocket cut
11:23 PM rue_mohr: and all cam programs seem to rely on that for drilling holes
11:23 PM Tom_L: i did have to edit it a bit because back then they weren't that efficient on cuts
11:23 PM rue_mohr: I'd have done it 1 op/step
11:23 PM Tom_L: now they all have adaptive cutting
11:23 PM Tom_L: don't re'cut what's already been cut
11:24 PM rue_mohr: that little circuit took me quite a while to assemble
11:24 PM rue_mohr: I'm realizing it takes me way longer to do a circuit on protoboard than an etched one
11:25 PM rue_mohr: prolly cause I cant really 'play' with positions
11:25 PM rue_mohr: I started that one by soldering down the 555 in the wrong corner
11:26 PM rue_mohr: that was my 2nd build of it, so I wasn't about to restart
11:26 PM Tom_L: better than dead buggin
11:26 PM rue_mohr: my desire to crunch it all into a tiny board thats laid out well and looks good is too strong
11:27 PM rue_mohr: its supposed to be an apocolypse mtoor driver
11:27 PM Tom_L: i used to be pretty good at that
11:27 PM Tom_L: i doubt i could anymore
11:27 PM rue_mohr: sloppy build with used parts that works
11:28 PM Tom_L: they're struggling on this lcnc release trying to convert to python3
11:29 PM Tom_L: and still support back to lucid