#garfield Logs
Jan 05 2014
#garfield Calendar
00:18 tsmeow-afk makes serious plans for sleeping to
00:20 katsmeow-afk one way to lower the gate drive is to not drive the gate down any lower than needed to turn it off, which is why i wasn't trying to drive it below 2v or 3v
00:30 katsmeow-afk if you ever build a totempole gate driver, it's handy to put a resistor in the pulldown emitter-gnd circuit to use as current limiting so you can drive the pulldown with wonton abandon and not worry about blowing it up
00:54 katsmeow-afk a resistor emitter-gnd and 2 diodes base-gnd, or a resistor and 3 diodes, etc
00:56 katsmeow-afk it turns the pulldown into a invertor with high voltage gain and a built-in current limiter
01:18 rue_house its the gate drive
01:19 rue_house http://eds.dyndns.org/~ircjunk/circuits/fetdrive.gif
01:20 rue_house thats the fancy one I made up
01:56 rue_house http://www.ioccc.org/2013/cable2/cable2.c
01:56 rue_house its C code!
01:57 rue_house its an OCR program
13:45 rue_bed why have I not heard of bacteria that feed on virus
13:47 Tom_itx they're kissin cousins
13:47 Tom_itx they don't mess with each other
13:48 rue_bed it seems a plausable scenario
13:49 Tom_itx i compiled the new linuxcnc last night
13:49 Tom_itx to test
13:49 Tom_itx dude wrote a better Trajectory Planner i wanted to try
13:50 rue_bed dosn't itcomeprecompiled on an install cd?
13:50 Tom_itx not the bleeding edge stuff
13:50 Tom_itx not released 2.6
13:50 Tom_itx cd is 2.5.3
13:50 e_bed get
13:51 Tom_itx it's complaining about one of my custom files though
14:11 Tom_itx at what temperature can you toss water in the air and have it freeze before it hits the ground?
14:39 rue_house minus something
15:28 tsmeow-afk keeps groaning something about gra
15:32 katsmeow-afk "Based on the temperature coefficient for soft iron, a rise in temperature of as much as 20 degrees centigrade would increase the resistance by 12%"
15:32 katsmeow-afk that's 70f
15:33 katsmeow-afk 70f on top of a 140f day in the summer sun is 212f , that would be some hot wire indeed
15:36 tsmeow-afk fires off a wget -r -np -nc -p -w30 -I/ldbutler/ -Pe:\ldbutler\ -oe:\ldbutler\log-ldbutler.txt -Dusers.tpg.com.au -k -x -e robots=off http://users.tpg.com.au/users/ldbutler/index.htm
15:37 katsmeow-afk and it dies
15:37 katsmeow-afk so *still* i believe a phrase like "mine this" is better
16:17 rue_house wow, there is SO much yard cleanup to be done
16:21 katsmeow-afk how is it getting SO messy?
16:22 katsmeow-afk you know you have too many dead puters when : you are using them as saw horses
16:26 katsmeow-afk i found some itty bitty "binder clips" just right for holding up layers of postits that have lost their adhesive
16:26 katsmeow-afk they aren't even 2cm across
16:29 rue_house what about plant stands and sidetables? :/
16:29 katsmeow-afk those make poor puters
16:29 rue_house its a server tower tho, its perfectly suited
16:29 katsmeow-afk you could hold down a lot of postits with a plant stand tho
16:30 katsmeow-afk paper can be so hazardous
16:31 tsmeow-afk remembers in the olden daze, laying paper out on an engine, and leaky ignition wires set it on
16:32 tsmeow-afk remembers in the olden daze, laying paper out on an engine, and the radiator fan came on and blew the paper down under the car onto the hot exhaust
16:34 katsmeow-afk or sitting at the puter quietly and calmly, and a layer of a dozen postits suddenly, without warning, came crashing down and caused a heart attack
17:27 katsmeow-afk tis amazing how much effort and body wear a demo hammer can eliminate
17:29 katsmeow-afk "Note: Please make sure the DC output and tip size of ac adapter are accordant before you bid."
17:50 katsmeow-afk http://powerwheelscd.com/images/frontire2.jpg
17:54 katsmeow-afk http://www.johnsavesenergy.com/LawnMowers.html
17:56 katsmeow-afk "rue, we don't mind the electric mower, we do mind the 160db low-battery warning on it"
17:59 katsmeow-afk http://3.bp.blogspot.com/-QhF7TPhivzE/Tlsj5rQNUHI/AAAAAAAAALY/a4IKa9m46xw/s1600/100_5472.JPG
18:01 katsmeow-afk Twenty 6 Volt 4.5Amp-Hour AGM batteries. 32.4 lbs
18:10 katsmeow-afk "These batteries are for electric applications only."
18:11 katsmeow-afk grinding one up to pour into the gas tank will void the warrantee?
18:23 katsmeow-afk "Even with all my fanaticism, I don’t lose any sleep over a dinky 50 watt ding dong. If someone were to ring my doorbell for ½ a second, 20 times a day, every day for a year, aside from me trying to kill them, the total time spent ringing the doorbell would only add up to 0.5*20*365 = 3650 seconds or ~1 hour per year. At 50 watts, that would only cost ½ cent per year."
18:24 katsmeow-afk "it flickers at 60 Hertz. I don’t know about you but that annoys the crap out of me. It might even send poor aunt Edna into an epileptic seizure each time she steps foot on my porch. I must rectify the situation. "
18:42 katsmeow-afk a man proud of his se wer plumbing : http://www.johnsavesenergy.com/resources/DWHR+Installed+w+cover.jpg
18:43 katsmeow-afk yep, 4 thermometers on it
18:46 katsmeow-afk that car looks fast just sitting still, how many furlongs per fortnight will it do?
19:12 katsmeow-afk "Every watt of standby power will cost you $1 every year. "
19:23 rue_house ah yea recovery collector $$$$$
19:24 rue_house looks like its on a heat pump, good show
19:24 rue_house nice mower, scarry charger
19:24 rue_house where is the fuse?
19:24 tsmeow-afk doesn't
19:25 rue_house haha 120V moninal
19:25 katsmeow-afk yeas, somehow i wonder a lil about his numbers on that
19:26 rue_house 145V charged, the 170V peak from that charger will hurt them if left on too long
19:26 katsmeow-afk he say it's not regulated?
19:26 rue_house dc should only be about 80 or 90V to run that
19:32 rue_house those are prolly about 5Ah batteries
19:33 rue_house that motor will pull about 4 to 10A, light mowing if the blade is good
19:33 katsmeow-afk he mowes for 55minute, 5A@120vdc = 600w = 0.8hp
19:33 rue_house ah
19:33 katsmeow-afk the math works, if the batteries are any good
19:34 rue_house its hard to find a disposed electric mower
19:34 rue_house most of them have shot motors
19:34 tsmeow-afk
19:35 rue_house are the handles extended?
19:35 katsmeow-afk handles?
19:35 rue_house tehre is welding on the handles
19:35 katsmeow-afk i don't have the page open, i saw only as much as you can see
19:36 rue_house the batteries wont last long if he dosnt' manaully stop the charge
19:36 katsmeow-afk if it's a folding handle, the hinge/clamp portion prolly died, i hate those
19:36 rue_house and there should be some fuses *in* the bank
19:36 katsmeow-afk so the charger is not regulated?
19:37 rue_house its a bridge rectifier on a plug
19:37 katsmeow-afk i thought i saw a smal module up on the concrete wall to the left
19:38 rue_house there is a cord, with a bridge rectifier, and spade connectiosn dnagling beside the mower
19:38 katsmeow-afk url?
19:38 rue_house http://3.bp.blogspot.com/-QhF7TPhivzE/Tlsj5rQNUHI/AAAAAAAAALY/a4IKa9m46xw/s1600/100_5472.JPG
19:39 katsmeow-afk see grey module above the bridge
19:39 rue_house isn't it a beer can/
19:40 katsmeow-afk the white wire goes up to it, and comes back down as a red wire, i dunno what it is
19:40 rue_house woudl make sense if it were a resistor
19:40 rue_house k, I can agree with that
19:40 katsmeow-afk there is a fuse on the motor housing
19:41 rue_house the overtemp?
19:41 katsmeow-afk it's grey, on top of motor, tween motor and battied, near a spade terminal on the motor
19:42 katsmeow-afk wow at the weldng on the handles
19:42 rue_house this loooks to me like someone who, for the most part, knew what they were doing, but was just hacking it
19:42 rue_house yea, even I'm better than that
19:43 katsmeow-afk i notice the tire on the riding mower to the left
19:44 katsmeow-afk he daisey chained those batteries front-to-back, there really should be a fuse at the end of each run
19:44 katsmeow-afk and obviously, duct tape won't stay put
19:44 katsmeow-afk he must have them covered in use, they are all shiney clean
19:45 katsmeow-afk or, he hasn't used them yet
19:45 rue_house http://kc7ekk-solar.blogspot.ca/2011/08/my-electric-lawn-mower-named.html
19:45 katsmeow-afk yeas
19:45 katsmeow-afk that biggarsed battery is why he busted the handles
19:49 katsmeow-afk arg, that cold front got here, i can feel my sinuses
19:49 rue_house oh the boiler!
19:50 katsmeow-afk what about it!?
19:50 tsmeow-afk is soooooooooooooooooo tempted for more lasagna, the Food of Kat, but she already had two bowls o
20:05 katsmeow-afk it is still warm enough upstairs, i should be cutting and welding stuff up thjere
20:09 rue_shop3 I changed the i2c pullups from 4.7k to 1k, and I seem to be getting proper readings from everyone
20:09 rue_shop3 less the tank sensor keeps deciding the temp is 1/10th what it is
20:12 rue_shop3 hmm
20:12 rue_shop3 well it worked for 1 reading
21:03 rue_house it stabalized, everyone is working
21:04 Lola8088 all of your putters are putting again?
21:04 rue_house the boilers sensors are all woring
21:04 rue_house ^k
21:04 rue_house they been flakey for a long time
21:04 rue_house it only relies on 2 of them for operation
21:05 Lola8088 :)
21:05 rue_house and one of those two is what I been having troubles with
21:05 rue_house I got athe aldars trimmed
21:05 rue_house that was overdue
21:05 Lola8088 I'm playing with CS6. I like it :)
21:06 rue_house Column Select?
21:06 rue_house Commet Studio?
21:06 rue_house Cernel Sanders?
21:06 Lola8088 photoshop
21:06 rue_house of course
21:07 rue_house can you make a picutre of what I'd look like with hare?
21:07 Lola8088 Yup.
21:07 rue_house hop to it! :)
21:07 Lola8088 send me that one on the garden float
21:07 rue_house there, now you have a frivilous project
21:08 rue_house hmm
21:08 Lola8088 I'm playing with text features... Crinkly Series
21:10 Lola8088 XD
21:10 rue_house hmmm
21:10 Lola8088 3D!!!
21:11 atom1 give him a duck dynasty beard too
21:11 Lola8088 hahHHEHEHH
21:11 Lola8088 Done
21:12 rue_house hmm what one was that...
21:13 Lola8088 the one of you on the float, red shirt, folded arms, smiling
21:14 rue_house I wonder if I can dcc you
21:14 Tom_itx i could show you an old one
21:15 Lola8088 Oh... yes... please do!
21:15 Lola8088 The more photos the better
21:16 rue_house did you get the file offer?
21:16 atom1 who?
21:16 Lola8088 I did, and I accepted and then it automajically disapeard.
21:16 rue_house k, firewall
21:17 rue_house ok I emailed it
21:17 rue_house er... ing...
21:21 katsmeow-afk rue was floating?
21:22 katsmeow-afk the air is all painty upstairs, and grindingdusty
21:22 katsmeow-afk i have a bad feeing the shelf unit will be too heavy for me to carry down here and install
21:24 tsmeow-afk wonders how she can have other feeings about the shelf
21:31 rue_shop3 huh, gas pilot thermocouples aren't much good for detecting if a wood firebox is on fure
21:31 rue_shop3 about 10uA at about 1mv
21:31 katsmeow-afk that should tun on a fet, try the 071 again
21:32 rue_shop3 1mV?
21:32 katsmeow-afk the sensor will need to be in the hottest part of the exhaust gass flow, since the fire itself is too spread out
21:32 rue_shop3 I dont think I can even get that out of the noise region
21:32 katsmeow-afk you think you can make me pull up the datasheet again?
21:32 rue_shop3 I need something just to know if the firebox is on fire
21:32 rue_shop3 basic
21:33 rue_shop3 it only needs to detect like 60c, but it needs to be able to withstand 1500c
21:33 katsmeow-afk umm,, i have an idea but when (not if) it rusts thru there will be an explosion
21:33 e_shop3 thinks water/pres
21:34 rue_shop3 what is the expansion co-eff of water?
21:34 rue_shop3 100:1
21:34 rue_shop3 ?
21:34 katsmeow-afk ok, i got it: two pipes, one largeish, one to fit really lose inside it
21:34 rue_shop3 k...
21:34 katsmeow-afk close off ends of each, fill outer one with water, insert small one with some liquid popane in it
21:35 rue_shop3 ?
21:35 katsmeow-afk the water will boil (make sure it can exit and refill with liquid water, the water ill keep the propane below 100C , use stainless, detect propane pressure, all is good
21:35 rue_shop3 wy not detect the water pressure
21:36 rue_shop3 use an expansion take
21:36 rue_shop3 nk
21:36 rue_shop3 make sure the water drains back into the sense tube
21:36 katsmeow-afk because you cannot aloow for the steam at 1500c
21:36 katsmeow-afk and still detect the pressure at 60c
21:36 rue_shop3 the water would just stay away from the hot end
21:36 rue_shop3 I wonder if 100c would be close enough
21:37 rue_shop3 the idea is that you light a basic fire in the box, the fan automatically kicks in
21:38 katsmeow-afk i thought you had that
21:38 rue_shop3 no I have to trigger the fan manually
21:38 katsmeow-afk if the fan rus with no fire, you are wasting electricity and cooling it off
21:38 rue_shop3 I also need to add a sensor for the exchanger temp, to automatically control the boiler circ pump
21:38 rue_shop3 yea
21:39 katsmeow-afk car engine O2 sensor?
21:39 rue_shop3 the system turns the fan on and off as it needs more heat, but if there is no fire it just sits there asking for more air
21:39 rue_shop3 hah, thetank sensor just flaked out again
21:41 rue_shop3 hmm wonder if thats to do with a surge from the blower kicking in
21:41 katsmeow-afk electrical surge blowing it?
21:42 rue_shop3 at about the same time the blower kicked back in, the tank sensor dipped to 0
21:42 rue_shop3 the real temp is 70c
21:42 katsmeow-afk told ya: differential floating line, there should be no connection to the sensor line except the sensor and the puter
21:43 rue_shop3 the impulse might be enough to cause serial data corruption, if it happened during the transfer
21:43 katsmeow-afk unless the air temp is 0 and there is cold air cooling the sensor
21:44 katsmeow-afk differential lines are amlost 100% impervious to radiated noise
21:44 rue_shop3 thei digital lines
21:44 rue_shop3 its i2c sensors
21:44 katsmeow-afk differential can be digital
21:44 rue_shop3 I have no probnlems wti them in the house
21:44 rue_shop3 i2c dosn't do diffreential
21:45 katsmeow-afk MAKE it do it
21:45 katsmeow-afk gee, rue, ethernet is differential
21:45 rue_shop3 the hwole reson I used i2c was cause its easy and its built into the linux kernel
21:45 katsmeow-afk so you got a lot of easy failures on that line
21:46 rue_shop3 I'll work on figuring out why its a problem here
21:46 katsmeow-afk optocouple it then
21:46 rue_shop3 I'v had problems before with the power supply that runs everything,
21:46 rue_shop3 technically this supllyis a hack
21:46 rue_shop3 could you draw up how to opto couple a bidir line for me? I keep getting stuck on that
21:46 katsmeow-afk oh
21:47 rue_shop3 my point is that I did it this way cause it was easy, and it was working
21:47 katsmeow-afk what if you power the sensor down, which should cause a reset, before every reading?
21:47 rue_shop3 since I changed the 4.7k pullups for 1k its working a lot better
21:48 rue_shop3 if I have the motor driver causing EMP to the sensor grid, I should fix that
21:48 katsmeow-afk in fact, power down, read, power down, read aagin, readings should match
21:48 katsmeow-afk yeas, you should
21:48 rue_shop3 I been thinking of taking a shielded pipe set out to the boiler from the shed anyhow
21:49 katsmeow-afk on the otehr paw, your sensor grid is too accepting of emps
21:49 rue_shop3 all the sensor cables are shielded
21:49 katsmeow-afk and yet........
21:49 rue_shop3 yea
21:49 katsmeow-afk speaking of such, how went the elevator cable thing?
21:49 rue_shop3 worked like a charm!
21:50 katsmeow-afk which solution?
21:50 rue_shop3 rs232 to the rescue
21:50 katsmeow-afk ah
21:50 rue_shop3 I just used the max232's
21:50 katsmeow-afk kool;
21:51 rue_shop3 I still dont understand why the boiler output is at 57 and the tank is at 72
21:51 katsmeow-afk no fire, the fan is on and cooling the water flow
21:51 rue_shop3 the tank sensors must read low cause they are under flow
21:52 rue_shop3 no, its heating, they both go up with that difference on them
21:53 rue_shop3 then again that would explain why the exchanger starts to boil when the output sensor says that waters only like 89c
21:53 katsmeow-afk i wonder if it is possible to homemake a 60a@15vdc regulated psu for $100
21:54 rue_shop3 oo 900W
21:54 rue_shop3 I'd use atleast 3 pc psu's
21:54 katsmeow-afk i spose, with a free MOT
21:54 rue_shop3 modified in parallel
21:55 katsmeow-afk i have not seen a 300w pc psu deliver 300w continuously
21:55 rue_shop3 saturable reactor regulation?
21:55 katsmeow-afk no, just to get the 15v down from 120
21:56 katsmeow-afk could use a fat igbt to switcher the 120 to keep the output down some
21:57 katsmeow-afk it would still need 60,000u or more of output caps
21:57 rue_shop3 I have a transformer that outptus 1200A, but its only at 1.2V
21:58 katsmeow-afk yea, that might be pricey to rectify and not lose the 1.2v
21:59 katsmeow-afk if you need a set of high freq 2000v scope probes, on sale now for $80 pair free s&h
22:05 rue_shop3 free s&h!
22:05 rue_shop3 ok, wheel sensor
22:05 rue_shop3 a wheel has an encoder,
22:05 rue_shop3 and a microcontroller, goes to an optical link, 1 led
22:06 rue_shop3 if the microcontroller uses a 0.5ms pulse to indicate a count backwards, and a 1ms pulse to indicate a pulse forwards
22:08 rue_shop3 28 lines
22:09 rue_shop3 7.5" dia wheel
22:09 rue_shop3 the max freq is 500hz
22:10 rue_shop3 adduming its not quadrature decoded
22:10 rue_shop3 say, 17rps
22:10 rue_shop3 Circumfrence is : 23.561945
22:11 rue_shop3 36 km/hr
22:12 rue_shop3 I guess thats an ok limit
22:13 rue_shop3 esp since its a bit better, there is a little ratio in there I didn't mention
22:14 rue_shop3 so them I better not do quadrature
22:16 katsmeow-afk temp is dropping, i better go do more welding
22:17 rue_shop3 looks like that will give the robot about 1" of travel resolution
22:54 Tom_itx 6° F
22:55 Tom_itx falling into the single digits and wind chills around -10 to -14 below zero.
22:55 Tom_itx wind chills as low as -17 to -21 by morning.
23:09 rue_house its like 1c out here
23:22 tsmeow-afk falls onto the
23:22 katsmeow-afk Updated: 11:02 PM CST on January 05, 2014
23:22 katsmeow-afk Rain
23:22 katsmeow-afk 37.4 °F
23:22 katsmeow-afk what sounded like sleet hit the roof for a minute
23:22 katsmeow-afk or small hail
23:23 katsmeow-afk yep, there was some pink stuff in Alabama : http://images.intellicast.com/WxImages/Radar/csg.gif
23:24 tsmeow-afk is allowing welding to cool so the frame can be flipped
23:25 rue_house huh, looks like another mess from our french counterparts
23:26 katsmeow-afk you calling my welding a frech mess?
23:26 katsmeow-afk Monday
23:26 katsmeow-afk Breezy. Partly cloudy. A 20 percent chance of snow showers in the morning. Near steady temperature around 19. Northwest winds 15 to 25 mph. Wind chill readings around 4 below.
23:26 katsmeow-afk Monday Night
23:26 katsmeow-afk Colder...clear. Lows around 6. Northwest winds 10 to 20 mph. Wind chill readings around 13 below.
23:27 katsmeow-afk Tuesday
23:27 katsmeow-afk Sunny. Highs in the lower 20s. Northwest winds 5 to 10 mph. Wind chill readings around 11 below.
23:27 katsmeow-afk supposed to start warming Wednesday
23:29 katsmeow-afk temperatures in N Dakota and N Wisc below -20f
23:29 katsmeow-afk Key West : 65f