#garfield Logs

Nov 14 2015

00:12 katsmeow-afk <blink>
00:12 katsmeow-afk how's your giariasis?
00:13 rue_shop3 I have some gas but my system is really good right now, relativly speaking
00:13 rue_shop3 I'v finished assembling a regulator board
00:13 rue_shop3 no power driver
00:13 rue_shop3 that'd be next
00:14 rue_shop3 the sudotesting of this board seems to check out
00:15 katsmeow-afk did you figure out my design not going to gnd?
00:15 rue_shop3 no
00:15 rue_shop3 I was digging thru my notes and your design looks a LOT like the one I was playing with before, that I think worked
00:16 rue_shop3 basically a current mirror to a high side amp
00:16 tsmeow-afk
00:16 katsmeow-afk it's a basic classic, been around for many decades
00:16 rue_shop3 I have lots of things to figure out yet, the buck converter is going to be a zoo
00:16 rue_shop3 trying to think how to test the output filter
00:17 katsmeow-afk the only iffy part is the opamp going low enough on the inputs and the output, (or you switch over to bipolar psu for the opamp)
00:17 rue_shop3 I have a generic pwm gen that I THINK I can wind up to 250Khz
00:18 rue_shop3 I have to find some inductors, I think I want gapped for this
00:18 rue_shop3 0.1mH I dont know if thats a reasonable number or not
00:19 rue_shop3 I'll need 3 inductors each, so I need to use something I ahve 6 of
00:19 rue_shop3 arg, my eyelids are getting heavy
00:20 rue_shop3 I also have to hook this board I made to a microcontroller and see how the DAC output actually behaves
00:20 rue_shop3 so far I'm just simulating it
00:21 tsmeow-afk decides to trap two illegal opcodes, and convert them to zero page read or write, and flip the actual zero page for 256 bytes of io pins for the read/write opera
00:22 katsmeow-afk that gives me real cheap io and doesn't use any more memory space
00:24 rue_shop3 # ohm -p 5 -r 0.1
00:24 rue_shop3 Wattage is: 5.000000
00:24 rue_shop3 Current is: 7.071068
00:24 rue_shop3 Voltage is: 0.707107
00:24 rue_shop3 Resistance is : 0.100000
00:24 e_shop3 rer
00:24 rue_shop3 katsmeow-afk, cool
00:25 rue_shop3 ok, so if I use my 5W current sense resistors I can go up to 7A
00:25 rue_shop3 and my design is for 5A, so that works
00:26 rue_shop3 hmm I need a plate heat exchanger
00:26 rue_shop3 where can I get fine pitch corrigated metal?
00:27 rue_shop3 copper radiator!?
00:27 rue_shop3 hmmm
00:27 rue_shop3 let me think that over
00:28 rue_shop3 coaxial pipe with a corrigated inner pipe
00:30 katsmeow-afk 686 cpu heatsink and fan
00:30 rue_shop3 I need a water-water heat exchanger
00:30 katsmeow-afk car radiator inside a fish tank?
00:30 rue_shop3 thats kinda one of the things I was thinking
00:31 katsmeow-afk yu can weld up a box around any air conditioner coil you can find
00:31 rue_shop3 if I pump out of the tank, then the water can free return into it
00:31 rue_shop3 and the hot tank will help heat the room more
00:31 rue_shop3 ooh
00:31 rue_shop3 hmm
00:32 katsmeow-afk are you replacing the leaky radiator yu put in the plenum?
00:32 rue_shop3 no, I want to get hot water into the shop floor
00:32 rue_shop3 and not use the electri$ity to do it
00:33 rue_shop3 1500w continious for 3 days to get up to 'descent'
00:33 katsmeow-afk descent = downwards
00:33 rue_shop3 I think there is too much ground water running under the shop
00:33 katsmeow-afk decent = ok
00:33 rue_shop3 descent = warm
00:33 katsmeow-afk descent = remove the smel from
00:34 rue_shop3 4 = 2+1 for large values of 1
00:34 katsmeow-afk you have pipe in the floor pour, yeas?
00:34 rue_shop3 yea
00:34 rue_shop3 1500w continious for 3 days to get up to 'descent'
00:35 rue_shop3 I think there is too much ground water running under the shop
00:35 katsmeow-afk tv show 20 yrs ago did a barn into a workshop, heated the floor for 2 months the first winter, and disconnected it because of cost
00:35 katsmeow-afk and they had pourd the floor on top of 2" of closed cel foam panels
00:35 rue_shop3 I didn't insulate the slab properly, my fault
00:36 rue_shop3 I have no foam under it
00:36 rue_shop3 just around the outside edge
00:36 katsmeow-afk i wouldn't trust foam to hold weight anyhow
00:36 rue_shop3 so thankyou, that helps me feel that even if I did it right I'd be screwed
00:36 katsmeow-afk i mentioned it before :-)
00:37 rue_shop3 if I add continious 50-75W to this shop, it damn near overheats
00:37 katsmeow-afk but you'll be heating the ground, mostly
00:39 katsmeow-afk why must you have water-water exchanger?
00:43 rue_shop3 if I'm using the bioler I can pump lots of cheap heat into it
00:44 rue_shop3 the boiler could prolly get the floor up to heat quick and it'd last a while
00:44 rue_shop3 hey do you see those at your scrapper?
00:45 katsmeow-afk floors? no
00:45 katsmeow-afk roofs, yeas
00:45 rue_shop3 echangeres
00:45 katsmeow-afk saw one marine stainless tube exchanger is seriosly bad condition
00:45 katsmeow-afk see lots of ac cols, and radisators
00:45 rue_shop3 I suppose it is a scrapper
00:46 rue_shop3 I wonder how many btu I need
00:46 katsmeow-afk some almost new coils, one i cold swear was never used, but he wants money for them, lots of copper and aluminum in them
00:46 rue_shop3 more than 5000
00:47 katsmeow-afk zhanx : fish tank : http://www.conceptualdevices.com/wp-content/uploads/2011/06/DSC9176_LOW.png
00:51 zhanx Not a fish tsnk
00:51 katsmeow-afk 100 gallons of water
03:42 katsmeow-afk http://arstechnica.com/tech-policy/2015/11/beware-of-ads-that-use-inaudible-sound-to-link-your-phone-tv-tablet-and-pc/
03:48 katsmeow-afk meaning that users have no knowledge of which apps are using this technology and no way to opt-out of this practice. As of April of 2015, SilverPush�s software is used by 67 apps and the company monitors 18 million smartphones.
03:48 katsmeow-afk reporting that cross-device tracking has been put to use by more than a dozen marketing companies. The technology, which is typically not disclosed and can't be opted out of, makes it possible for marketers to assemble a shockingly detailed snapshot of the person being tracked.
03:49 katsmeow-afk "Using nothing more than the built-in microphones and speakers of standard computers, the researchers were able to transmit passwords and other small amounts of data from distances of almost 65 feet."
03:49 katsmeow-afk IMO, that advertisers keep basing their technological "progress" off of malware research and techniques is very telling.
04:06 katsmeow-afk https://en.wikipedia.org/wiki/Project_Pluto
10:28 Tom_itx SW under win8 will PRINT 3d
10:28 Tom_itx with a couple different formats
11:48 rue_house http://ruemohr.org/~ircjunk/projects/newpower/p1070573.jpg
11:49 rue_house the bottom transistor is upside down
11:49 rue_house marked the E and C backwards on the diagram
11:49 Tom_itx what is it?
11:49 rue_house 2n3906
11:50 Tom_itx the board
11:50 Tom_itx what's it for
11:52 rue_house regulator for power supply
11:52 rue_house its like an LM723 but with serial inputs
11:53 Tom_itx is 1TB for $99 a good price?
12:03 rue_house sure
12:03 rue_house unless its a seagate
12:16 Tom_itx 2.5" WD
12:35 rue_shop3 might beok
12:35 rue_shop3 you cant put WD on the shelf for 4 yeras tho
12:42 Tom_itx just an extra
12:42 Tom_itx i needed a 64bit os for something
17:34 rue_shop3 ow many uH is 0.1mH...
17:34 rue_shop3 its 100
19:42 ^kat^-afk http://designerthinking.com/JL/DSCF6815m.jpg <<== glass welding blankie covering 2 poly barrels for close up welding protection
19:44 ^kat^-afk you see two 1" angle just an inch from the blankie bottom edge, i will be tacking to the inside of the angle, so the arc is not an inch from the glass
19:45 at^-afk goes prowling for di
20:27 Tom_itx install windows and 3 days later maybe you get to use the pc
20:28 Tom_itx 181 updates later
20:28 Tom_itx and that's just round 1
20:40 rue_shop3 heh
20:40 rue_shop3 nice kat
20:40 ^kat^-afk http://designerthinking.com/JL/DSCF6817m.jpg <<== difference in size tween a "6" lathe chuck" and a "6" faceplate"
20:41 rue_shop3 Tom_itx, nothing like not being to 'just shut down' a laptop before you have to run with it because its decided to isntall a half hour of updates
20:41 rue_shop3 kat interesting
20:44 Tom_itx 5 stages of reboot now
20:46 rue_shop3 yep, me and linux.
20:46 rue_shop3 not lookign back
20:48 Tom_itx i use both
20:49 Tom_itx you can't run SW on linux
20:49 rue_shop3 I cant afford windows
20:49 rue_shop3 and I'm not talking about buying it
20:49 rue_shop3 I'm not talking just about how much the computer costs that can run it descently
20:50 rue_shop3 mostly I'm talking about all the pampering and maintenance
20:50 rue_shop3 kats worked it out
20:52 Tom_itx i've had to do as many or more linux updates
20:53 Tom_itx oh and when the new linux comes out all the other packages won't work with it.. you gotta get new ones
20:53 Tom_itx and some aren't written yet
20:53 rue_shop3 ?
20:53 rue_shop3 never had issues, you ask for the package and apt upgrades everything it needs to, to get there
20:53 Tom_itx just saying one isn't any better than the other
20:54 rue_shop3 I'v never had to reinstall a linux machine
20:54 rue_shop3 my main machine was installed in 2000
20:54 rue_shop3 15 years without a reainstall
20:54 Tom_itx you run minimal machines nad leave them
20:54 rue_shop3 its not that minimal
20:58 Tom_itx don't get me wrong, i like linux but i also use windows
20:58 Tom_itx whichever i need to get a job done
20:59 rue_shop3 I got rid of the last windows machine after not having used it for over a year
20:59 rue_shop3 I suppose there is still a machine in here with windows, but its been parked for .. more than 4 years
21:00 rue_shop3 that said the eprom burner is a dos machine
21:00 Tom_itx well you're missing out on alot of things that could make what you like to do simpler
21:00 rue_shop3 what?
21:01 rue_shop3 cam?
21:01 rue_shop3 technically I dont cam yet
21:01 Tom_itx i found out the other day that sw 2016 will print 3d in a couple different formats
21:02 Tom_itx stl is one
21:02 Tom_itx the other is likely a commercial format
21:02 rue_shop3 stl is just the format you put into the slicer before you send it to the spooler
21:02 Tom_itx sw will do the layers
21:03 rue_shop3 I bet it cant send to a hpgl vector plotter tho :)
21:03 Tom_itx i'm not sure about that
21:03 rue_shop3 the slicer output is G-code
21:03 rue_shop3 and like all gcode its machine specific
21:03 Tom_itx somewhat, yes
21:03 Tom_itx the basic codes are consistent
21:04 rue_shop3 I need to test the pwoer filter for the switching converter
21:04 rue_shop3 but it looks like I'm gonna have to assemble the fet drivers to do it
21:04 Tom_itx anyway, i've been trying to learn sw a bit and catia
21:04 rue_shop3 I cant get any of my other stuff to drive a P channel fet at 250Khz
21:04 rue_shop3 Tom_itx, yea, your projects were looking good, you still doing em?
21:05 Tom_itx a few
21:05 Tom_itx running out of drawings
21:05 Tom_itx i have some old ones i did a long time ago i could probably do
21:05 rue_shop3 I found a bunch of 0.3-0.4mH inductors from power supplies
21:06 Tom_itx i need to find a new sata power plug
21:06 rue_shop3 ?
21:06 Tom_itx i broke the edge off one i need
21:06 rue_shop3 converter?
21:06 rue_shop3 oops
21:06 Tom_itx psu
21:06 Tom_itx it still works
21:06 e_shop3 waffles on putting a heater in the
21:07 ^kat^-afk beats pancaking
21:08 rue_shop3 ugh, yea I'm gonna have to make the fet driver
21:47 rue_shop3 6V 75R
21:47 rue_shop3 ohm -v 6 -r 75
21:47 rue_shop3 Wattage is: 0.480000
21:47 rue_shop3 Current is: 0.080000
21:47 rue_shop3 Voltage is: 6.000000
21:47 rue_shop3 Resistance is : 75.000000
21:47 rue_shop3 hmm need to get up to 5A
21:48 rue_shop3 so far, the first stage of the pwm filter has 10mV ripple nomatter what I do it to
21:50 rue_shop3 1R 2V
21:50 rue_shop3 ohm -v 2 -r 1
21:50 rue_shop3 Wattage is: 4.000000
21:50 rue_shop3 Current is: 2.000000
21:50 rue_shop3 Voltage is: 2.000000
21:50 rue_shop3 Resistance is : 1.000000
23:38 rue_shop3 ^kat^-afk, do you think I can push a PN2222 over 4uS/12V rise/fall?
23:38 rue_shop3 wait
23:39 rue_shop3 0.4us
23:39 rue_shop3 lost a decimal :)
23:39 rue_shop3 ^kat^-afk, do you think I can push a PN2222 over 0.4uS/12V rise/fall?
23:39 ^kat^-afk define "ove"
23:39 ^kat^-afk over
23:40 rue_shop3 well, faster rise/fall
23:40 ^kat^-afk i am sure it can go slower
23:40 rue_shop3 goal is faster
23:40 rue_shop3 pwm you know
23:40 ^kat^-afk it's going to start looking like flat-topped triangle waveforem, but you prolly can
23:41 rue_shop3 but i need it to be square
23:41 ^kat^-afk going to go see if i can seep laying down, i just fellasleep sitting up
23:41 rue_shop3 had to completely redo the fet driver
23:41 ^kat^-afk gnites
23:41 rue_shop3 night