#garfield Logs

Jan 20 2015

00:06 katsmeow-afk Yusuf
00:13 rue_shop3 damn, late for bed
00:13 rue_shop3 and supper
00:13 rue_shop3 http://tom-itx.no-ip.biz:81/~webpage/toaster_oven/control_sch.png
00:13 rue_shop3 do you see a crystal?
00:14 katsmeow-afk no
00:16 katsmeow-afk i do see a ote that C5 must be suitable for 120vac mains operation, even tho it's connected directly to pin 18 of the atmega168
00:17 rue_shop3 ?
00:17 katsmeow-afk right avove where it says "Drawn by Tom_L", in thelower right corner
00:18 katsmeow-afk " C5 must be suitable for 120v mains operation"
00:18 katsmeow-afk i dunno why, when it's on the cpu, well away from any 120vac
00:19 rue_shop3 haha Tom_itx your cap numbers are wrong
00:19 rue_shop3 I didn't see it there kat
00:19 katsmeow-afk <curtsey>
00:20 rue_shop3 well, I applied power and nothing blew off the board
00:21 katsmeow-afk any idea why not?
00:21 katsmeow-afk maybe you didn't apply enough power
00:21 rue_shop3 I'm gonna guess that the capacitor polarity is right and all the wires go wher they should
00:24 katsmeow-afk The southbound lanes of I-75 are currently closed as authorities clean up and investigate.
00:27 rue_shop3 hahah I did
00:27 rue_shop3 I forgot to swap RX and TX
00:30 rue_shop3 there we go, get all the directions in the right order and the baud rate right and it speaks!
00:36 katsmeow-afk you are modulating the triac on the 120vac line to directly drive a speaker?
01:04 rue_house _I_ just used an SSR module
01:04 rue_house to operate the heater elements
01:06 rue_house I send 5V into it, and if it co-operates it dons't send 120V back into my avr
01:08 rue_house that would be a hell of a handshake
01:09 katsmeow-afk a short one too
01:11 rue_house I was cutting a 3d printed part and the knife missed the nothing past the cut and passed thru the first 2 layers of the tip of my finger
01:12 rue_house not often the right hand gets back at the left
01:26 katsmeow-afk that's one way to drink, i spose, jump into it so your nose sticks above the water level, and open your mouth
01:37 katsmeow-afk zzzzzz
06:53 katsmeow-afk .
09:31 rue_house https://hackadaycom.files.wordpress.com/2015/01/hml-pass.jpg?w=1200&h=675
09:31 rue_house wouldn't it almost be better to have a high and low peak for each sample period?
09:32 rue_house instead of all the silly aliasing?
09:42 katsmeow-afk what is it?
09:42 katsmeow-afk just a frequency sweep?
09:43 katsmeow-afk the point of sampling is to *not* track the analog signal
09:44 katsmeow-afk if you do a high and low of the signal, then you need accurate high freq comparators in real time
09:44 katsmeow-afk by sampling it randomly out of sync, and holding the voltage a short time, you then do an a/d conversion at your leisure
09:45 katsmeow-afk this is why digital scopes cannot work on non-repetitive signals
09:52 katsmeow-afk with some math, you can have the scope draw lines between the sample dots, altho this can make a scope pic even more screwy
10:05 katsmeow-afk the article isn't well written
10:06 katsmeow-afk when he says opamps are good in active filters up to only a couple Mhz, it's not the gain-bandwidth he should be talking, it's the phase lag thru the opamp that's going to limit it in filter use
10:07 katsmeow-afk a descrete time difference tween the input signal and the output, if the output is too far off it has little relationship to the input, so it's useless to the filter action, and all the math used to design the filter is useless
10:08 katsmeow-afk some opamps have a ton of transistors, and a few capacitors, and take microseconds to settle the output from an input shift
10:09 katsmeow-afk an Rf or at least a video opamp have maybe only 4 transistors and no capacitors internally, and are very fast from input to output
10:11 katsmeow-afk look at the phase plot of a 741, at some point the output is so lagged, it's 180 degrees from the input, so in a filter circuit it is going to do exactly the opposite of what you want it to do
10:13 katsmeow-afk this is why some amplifiers sound different too, the low freq output may be in sync with the input, but the high freqs are reversed phase, making some instruments sound like .. wierd, or something else
10:14 katsmeow-afk if you feed in a square wave, and reverse the hf components of the signal, you don't have a square wave any more, it's not hifi
10:25 tsmeow-afk shows rue the phase plot of a AD8051 opamp, which is almost phase-flat to 100Khz, but at 1Mhz is 60 degrees off, and it's a fast 145v/us slew rate o
11:19 katsmeow-afk http://www.techspot.com/news/59451-11840-square-foot-mansion-3d-printed.html
18:48 rue_house funny
18:49 rue_house I was just thinking how AR could be used to make buildings
19:29 katsmeow-afk who is AR ?
19:35 katsmeow-afk Fifty Shades of Grey: Two Things You Won't Be Seeing In the Movie : NASA's new images of dwarf planet Ceres, and 3D printing a full sized mansion with cement.
19:36 katsmeow-afk so pretty much, it's the same as saying i won't see the movie
20:29 rue_shop3 augmented reality
20:29 rue_shop3 I designed a pcb! :)
20:30 katsmeow-afk i designed a pcb before
20:30 katsmeow-afk you designed a pcb before
20:30 rue_shop3 :)
20:30 katsmeow-afk Tom designed a pcb before
20:31 tsmeow-afk hooks rue to a robot and put 3D glasses on him, so he can build a house by playing in virtual 3D s
20:32 katsmeow-afk well, when we see the mecha put down the house number sign, and take off running to the grocery store, we'll kow rue got some 3D glasses
20:34 katsmeow-afk Robot Builds 'Fort' In Local Parking Lot, more news at 6!
20:35 katsmeow-afk "yes, i can tell you what i saw, the robot suddenly looked to one side, said soemthingl ike 'OMD, i an still hooked to the mecha irl?!', got up and ran off."
20:37 katsmeow-afk "well, rue said he needed the day off, and i said not unless it was a national emergency. Next thing i know, a 12ft mecha shows up, says it's from NASA, and rue is needed for a national emergency, so i gave him the day off."
20:49 katsmeow-afk Rumors abound thru this area of a 12ft mecha crashing thru the woods at nite, carrying small packages with the word "Sparkfun" on them. No one knows that this means.
20:51 katsmeow-afk One hunter says his deer camera got a pic with the little package worded "thaishopetc" on it. A chinese invasion is being prepared for here.
20:54 katsmeow-afk This just in: a man recently released from the mental hospital says he saw several robots sitting around a campfire, beeping at each other.
21:21 katsmeow-afk WHAT
21:30 katsmeow-afk Yuyao Bopu Valve Co, LTD
21:30 katsmeow-afk model 2W024-08
21:31 katsmeow-afk Selected 12vdc / 24VDC / 110vac / 220vac
21:36 katsmeow-afk quit telling your sister those are sliced martian worms, for jove's sake, those are string beans from earth!
21:48 katsmeow-afk "i am not sure we are from around here,,,, my parents keep saying things like 'we are a normal earth family' and 'we are GOING to do things like earthlings!' and 'but this is what they eat on earth' ,, and then they'll all look at me sideways for a moment"
21:49 katsmeow-afk "the other day, my mom said 'you are doing so well in this atmosphere!'"
21:58 katsmeow-afk one thing about background music in Japanese, i can't concentrate on the words
23:00 rue_shop3 normally it would make sense
23:01 rue_shop3 to just have a doorway out in the yard with a door thats always only open 6 inches
23:01 rue_shop3 but to a cat, this would make sense
23:01 rue_shop3 *normally it wouldn't make sense*
23:05 katsmeow-afk makes sense to me
23:05 katsmeow-afk remember the Star Trek "First Contact" movie? the song on the jukebox was "Ooby Dooby" by Roy Orbison <<== ORBIT-SON !?!
23:09 katsmeow-afk i once has a place i could leave the door open all the time i was there, the cats came and went thru it, no problem,, in winter i shut the door and opened a window the *same width*, i opened it 6inches, any time two cats when thru it, they fought over it
23:12 katsmeow-afk i had one very stupid cat, i could not get her to stay off the wood heater in summer, and her first winter she freaking ignored me and hopped onto the red hot wood heater, but didn't stay long
23:13 katsmeow-afk she came back in later, and burned her nose on it
23:16 katsmeow-afk she was walking outside one day, i was watching her, the deer, the birds, etc, and she passed a rock that had been there for at least a year, and it scared her
23:45 katsmeow-afk A fitness instructor filming for a Bravo network television show who died when he was struck by a Los Angeles-commuter rail train had been trying to outrun it.
23:45 katsmeow-afk Entertainment news website TMZ.com reported Tuesday afternoon Greg Plitt, 37, had been trying to prove the effectiveness of an energy drink when he was struck. According to TMZ, police have video of Plitt standing on the tracks in a runners stance and bolting down the track once the train approached.
23:45 katsmeow-afk he failed.
23:51 rue_shop3 can you find 74ls165 for less than ... 43c ea?
23:51 rue_shop3 dip!
23:52 katsmeow-afk LS? unlikely, but i'll look
23:53 rue_shop3 well
23:53 rue_shop3 can be any family
23:53 rue_shop3 I'm just trying HC
23:54 katsmeow-afk i have some DC165
23:54 katsmeow-afk er, HC
23:55 katsmeow-afk 74LS165 in soic qty 100 for $24 $6s&h
23:56 rue_shop3 http://www.aliexpress.com/item/Free-Shipping-20PCS-74HC165N-DIP-16-74HC165-8-bit-Parallel-In-Serial-Out-Shift-Register-74/2043388641.html
23:56 rue_shop3 8-|
23:56 rue_shop3 need dip!
23:56 katsmeow-afk 45 in dip for $15.77 + $5s&h
23:57 katsmeow-afk 75 in dip for $14.75 + $5s&h <<== prolly your best bet
23:57 rue_shop3 at $3 for 2pcs, I'm looking for the catch
23:57 rue_shop3 oo have an url?
23:57 katsmeow-afk $3 for 2pcs?? that's NOT less than 43c each
23:58 katsmeow-afk http://www.ebay.com/itm/75-PCS-SHIFT-REGISTER-SINGLE-8-BIT-SERIAL-PARALLEL-TO-SERIAL-16-PIN-DM74LS165N-/271718839518
23:58 rue_shop3 http://www.aliexpress.com/item/Free-Shipping-20PCS-74HC165N-DIP-16-74HC165-8-bit-Parallel-In-Serial-Out-Shift-Register-74/2043388641.html
23:58 rue_shop3 $3 for 20 pcd
23:58 rue_shop3 $3 for 20 pcs
23:58 rue_shop3 kjsdfkjhasdkfhaskdf
23:59 katsmeow-afk the 75 shipps from usa
23:59 rue_shop3 its too cheap, something has to be wrong
23:59 rue_shop3 oh, I dont want to buy from usa, $50 border fee, + 35 handling