#garfield | Logs for 2016-04-18

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[00:04:45] <rue_house> http://imgur.com/gallery/JpoJv
[00:04:45] <rue_house> damn
[00:07:43] <katsmeow> zhanx ?
[00:07:48] <katsmeow> what was that url ?
[00:07:54] <katsmeow> zlog help
[00:08:33] <katsmeow> 5 lines
[00:17:06] <katsmeow> zhanx , looks durable, i note the use of bolts
[00:24:51] <katsmeow> fwiw, epoxy on the threads and head to round them off and prevent cutting skin, it works
[00:43:38] <rue_house> hmm
[00:43:48] <rue_house> http://i.imgur.com/4AsYBOi.jpg
[00:44:00] <rue_house> I think its a russian teletype
[00:44:11] <rue_house> about 1965 I'd guess
[00:44:47] <rue_house> maybe older
[00:45:04] <rue_house> no, wait, I changed my mind
[00:45:07] <rue_house> its a calculator
[00:45:14] <rue_house> about 1975
[00:47:58] <katsmeow> Russian RPN programmable calculator. Year: 1983.. Price: 85 roubles (1983) Display: Fluorescent. Memory registers: 15
[00:48:25] <rue_house> your good
[00:48:29] <rue_house> 83?
[00:48:30] <rue_house> wow
[00:48:45] <katsmeow> http://www.ebay.com/itm/Programmed-Calculator-ELEKTRONIKA-MK-61-Vintage-Soviet-Russian-USSR-271334-/191591418838?rmvSB=true
[00:49:38] <rue_house> for just $23
[00:49:46] <katsmeow> http://i.imgur.com/9g3AP.jpg
[00:50:08] <katsmeow> http://3.bp.blogspot.com/-eX1MQckLrxM/VCW-nWDOI-I/AAAAAAAACOY/qXzIMxyuS6w/s1600/MK-52_schema_jm1_grey_part4.jpg
[00:50:37] <katsmeow> http://www.wass.net/manuals/Elektronika%20MK-61%20English.pdf
[00:55:48] <rue_house> ok ok
[00:55:50] <rue_house> :)
[00:56:10] * katsmeow grabbed some high speed ecl-cmos convertors, they have analog differential inputs to act like comparators, and rail-rail outputs, input to output is 5ns
[00:56:21] <rue_house> it was presented as an image someone thought was cool for a desktop background
[00:56:29] <rue_house> I was into working out what it was
[00:56:47] <rue_house> 8-|
[00:56:50] <rue_house> oh my god
[00:56:54] <rue_house> kat
[00:57:06] <katsmeow> what?
[00:57:07] <rue_house> LCD monitors are full of them
[00:57:35] <katsmeow> i don't have 100
[00:57:40] <katsmeow> 's of monitors
[00:57:48] <rue_house> just yesterday I was looking at all the differential buffers thinking it was too bad there aren't uses for them
[00:58:45] <katsmeow> 754 of them, quad translators, for $4.25
[01:00:09] <katsmeow> 0.56 cents per chip , total $4.25
[01:00:48] <rue_house> technically
[01:01:13] <rue_house> wouldn't they also mimmic a logic gate of some kind?
[01:01:41] <katsmeow> invertor, buffer
[01:01:56] <rue_house> xor?
[01:02:29] <rue_house> :/ I have the wrist of a 12' mech sitting on my desk
[01:02:31] <katsmeow> no
[01:02:40] <rue_house> I wish all the other parts were just kicking around here
[01:03:14] <katsmeow> and assembling themselves? why didn't they build themselves?
[01:03:45] <rue_house> I suppose its as simple as just making every peice and assembling it
[01:03:55] <rue_house> so what am I doing wrong?
[01:04:11] <katsmeow> i dunno
[01:04:26] <rue_house> I put the new charge controller on the solar lights, I'm excited to see how it works out
[01:07:12] <rue_house> lvds buffers
[01:07:23] <rue_house> I wonder what they can do for input tollerance
[01:08:59] <katsmeow> if you are sending differential, that may be enough
[01:09:29] <katsmeow> you can use opamps, comparators, or transformers to couple it to regular logic
[01:09:31] <rue_house> "lvds deserializer"
[01:09:43] <rue_house> is that a shift register, w/parallel out?
[01:10:20] * katsmeow nods
[01:11:10] <rue_house> yea
[01:11:19] <rue_house> 10 bits to a lvds pair
[01:11:31] <rue_house> at 40Mhz
[01:11:48] <rue_house> 480Mbps
[01:11:58] <rue_house> that has to be handy for a mecha
[01:13:46] <rue_house> hehe its got start and stop bits
[01:28:06] * katsmeow remembers using a couple resistors and an low speed opamp to bias high speed differential circuits to track difefrential signals
[01:32:11] <rue_bed2> oo
[01:32:59] <katsmeow> forced the input currents be the same over a wide common mode range
[01:40:21] <katsmeow> Maxim has a rail-rail input that is 2 pairs of differential inputs, servoed to track the common mode,,, if the inputs go too high that the top diff pair wold cut off, the bottom pair are still working properly, and vice versa