#garfield Logs
Feb 17 2020
#garfield Calendar
03:14 AM polprog: Tom_L: i read on wikipedia then in varios TI datasheets the propagation delays are smaller
03:20 AM polprog: http://digsys.upc.es/csd/units/Elect/TI_Digital_Logic_Families.pdf
03:20 AM polprog: this is a nice sheet, HC is 4th from the bottom, HCT is second to bottom, above CD4000
03:20 AM polprog: AC supposedly has 6.5 ns max propagation delay time, HC has 21, and HCT - 30
04:23 AM polprog: what a mess
04:24 AM polprog: no 7404 inverter schematics for HC, HCT, AC families in datasheets
08:38 AM polprog: rue_shop2: might be interesting for your ring osc stuff: http://web.mit.edu/6.012/www/SP07-L13.pdf
08:38 AM polprog: also https://www.eevblog.com/forum/projects/detailed-logic-family-differences-ls-vs-hc-vs-ah-etc/
11:59 AM rue_bed: hey, it looks like I can change the water pump today
12:01 PM rue_bed: none of those high freq osc' were stable tho
12:05 PM polprog: of the oscillators you had in your schem book?
12:06 PM rue_bed: yup, but it drifted
12:06 PM rue_bed: with temp
12:06 PM rue_bed: BADLY
12:06 PM polprog: hmm...
12:07 PM rue_bed: but they all work
12:07 PM rue_bed: if they were put in a PLL they would be ok
12:07 PM polprog: Ive bought a varicap and didnt note down the part no.. its an SMD part
12:07 PM polprog: yea i was to suggest making closed loop controll for one
12:07 PM rue_bed: k, some of the transistors I tried were much better range than varicaps
12:08 PM polprog: ill experiment, if the diodes are okay... ;) would mosfets driven below gate threshold work as capacitors as well?
12:09 PM rue_bed: try power bipolar transistors, to-220
12:09 PM polprog: hmm
12:09 PM polprog: right, two diodes as well
12:10 PM polprog: someone on the eevblog forum says "youre ready for the art of electronics"
12:10 PM polprog: i should continue reading that book
12:18 PM rue_mohr: looks like today is a truck pump day
07:13 PM rue_shop1: water pump is changed
07:13 PM Tom_L: cool, you should have given em a new one when they had it apart and sitting there
07:14 PM Tom_L: i'm sure they wouldn't go for that
07:44 PM rue_shop1: when it went in, I knew a bearing on somehting probably wasn't happy, but had not checked the pump/alt
07:44 PM rue_shop1: they told me at the end
07:45 PM Tom_L: so
07:45 PM Tom_L: did they give you a customer satisfaction survey to fill out at the end?
07:45 PM rue_shop1: nope!
07:45 PM rue_shop1: they dont tho
07:46 PM rue_shop1: they did the work truck, didn't top up any of the fluids
07:47 PM Tom_L: i was surprised on these hondas. they get full service as long as they own them for life
07:47 PM Tom_L: anything goes out, they fix it
07:47 PM Tom_L: i was just reading what all it covers
07:48 PM Tom_L: looks like everything but the expendables... tires brake pads etc
07:49 PM rue_shop1: huh
07:49 PM Tom_L: it was an extended warranty but i was surprised how cheap it was and how long it lasted
07:49 PM rue_shop1: ok, so I'm working on a coil winder
07:49 PM Tom_L: so i hear
07:51 PM rue_shop1: tom I have a huge store of parts
07:51 PM rue_shop1: I mean massive
07:51 PM rue_shop1: why am I not using this stuff up ?
07:51 PM rue_shop1: I should have enough stuff to build anyting
07:51 PM Tom_L: because you're still in collecting mode
07:52 PM rue_shop1: well thats broken
07:52 PM rue_shop1: collection is good, lets go!
07:52 PM rue_shop1: :)
07:53 PM Tom_L: does grbl do subroutines?
07:54 PM Tom_L: https://forum.linuxcnc.org/20-g-code/28019-winding-up-wire-on-a-coil
07:54 PM rue_mohr: nope
08:47 PM rue_mohr: int rollDigit(int v, int p) {
08:47 PM rue_mohr: int A, B, D, F;
08:47 PM rue_mohr: A = ((v / pa[p+1]) * pa[p] );
08:47 PM rue_mohr: B = v / pa[p];
08:47 PM rue_mohr: D = ( B - A ); // the digit
08:47 PM rue_mohr: F = v - (D * pa[p]); // the position is cleared
08:47 PM rue_mohr: D = ((D+1)>9)?0:D+1; // increment with non-carry rollover
08:47 PM rue_mohr: return F+(D*pa[p]);
08:47 PM rue_mohr: }
08:47 PM rue_mohr: this will allow me to set a value digit by digit
08:48 PM rue_mohr: doesn't handle negitive numbers
09:46 PM rue_mohr: its got a bug tho
09:58 PM Tom_L: bug better than rodent
10:30 PM Tom_L: what's this for?
10:49 PM rue_mohr: its got an oops
10:50 PM rue_mohr: it increments *just one digit* of a counter
10:50 PM rue_mohr: I'm building a new coil winder, kinda an upgrade,
10:50 PM rue_mohr: I have a pushbutton for each place to set the value
10:50 PM rue_mohr: https://twitter.com/RueNahcMohr/status/1229626464271659008
10:51 PM rue_mohr: there is a quick video of it right now
10:51 PM rue_mohr: atmega8, ali screen/button board
10:51 PM rue_mohr: I did a 3d printed cap on the motor and put an L293 driver chip in it
10:52 PM rue_mohr: I kinda blew it, cause with the connector, the rear cap doesn't fit
10:52 PM rue_mohr: I can make a deeper cap later, whatever :)
10:53 PM rue_mohr: I need to make up an analog foot pedel now
10:53 PM rue_mohr: it would be nice to make one for my welder while I'm at it
10:53 PM rue_mohr: Tom_L, does twitter give you any grief to view that video like that?
10:54 PM Tom_L: it flips me the bird first
10:54 PM rue_mohr: I dont think they *have* an advertizing mechanism for that
10:54 PM rue_mohr: heh
10:55 PM Tom_L: what's that counter board?
10:55 PM rue_mohr: its a "TM1638" display/keyboard board from ali
10:55 PM rue_mohr: they are on ebay too
10:55 PM rue_mohr: the brain is a mega8
10:55 PM rue_mohr: (on the breadboard)
10:56 PM Tom_L: project:
10:56 PM Tom_L: build a steady cam arm
10:56 PM rue_mohr: heh yea eh?
10:56 PM Tom_L: i bet you work like that too
10:57 PM rue_mohr: seem to have some ripple dont I?
10:57 PM Tom_L: so you need wire gage diameter, number of turns, width of spool....
10:59 PM rue_mohr: heh
10:59 PM rue_mohr: I think I'm going to forgo the positioning for this round
11:00 PM rue_mohr: every time I use this I upgrade it some, I kinda wanna get my transformers wound
11:00 PM rue_mohr: 89 turns * 6
11:00 PM Tom_L: you could have wound them by now
11:01 PM rue_mohr: *5 transformers
11:01 PM Tom_L: even so
11:01 PM rue_mohr: ~
11:01 PM rue_mohr: thats a lot of "ouch my hands are cramped up and I cant let go yet"
11:02 PM Tom_L: so time your stepper to turn 89 times and stand there
11:02 PM rue_mohr: along with "uh, was I at 38 or 48???"
11:02 PM Tom_L: so time your stepper to turn 89 times and stand there
11:02 PM rue_mohr: its a dc mtoor :)
11:03 PM Tom_L: you were just bragging about having one of everything in the world at your disposal....
11:03 PM rue_mohr: thats an interrupter disk
11:03 PM rue_mohr: with two interupters to make directional
11:03 PM rue_mohr: I have 4 crates of steppers
11:03 PM Tom_L: jeebus
11:03 PM rue_mohr: but I have that chuck fit nicely to the geared dc motor
11:04 PM Tom_L: wouldn't be hard to do it with feedback
11:04 PM rue_mohr: if you think that bad, you should see the drawr of 0.1uF caps
11:04 PM rue_mohr: indeed, but I'd need a timer and velocy code, and just... yea
11:05 PM rue_mohr: I'm trying to work from *some* of my previous work
11:05 PM Tom_L: so how many inches of wire is 89 turns?
11:05 PM rue_mohr: no idea
11:06 PM rue_mohr: I might do a test coil
11:06 PM Tom_L: how do they wind torroids?
11:06 PM rue_mohr: its a ring with a gap
11:07 PM rue_mohr: they have to put it thru the toroid, then load the wire onto the winder, then it unloads it on the toroil
11:07 PM rue_mohr: d
11:07 PM rue_mohr: iirc
11:08 PM Tom_L: let's utube it
11:08 PM Tom_L: https://www.youtube.com/watch?v=82PpCzM2CUg
11:09 PM Tom_L: see, you need to know how much wire it takes
11:09 PM rue_mohr: yup
11:10 PM Tom_L: pretty nifty
11:11 PM rue_mohr: yep
11:11 PM rue_mohr: I was pondering making something, but meh
11:11 PM Tom_L: u should build one
11:12 PM rue_mohr: hah, I dont need it yet
11:12 PM rue_mohr: I'll use my split core for now
11:12 PM Tom_L: https://www.youtube.com/watch?v=lEBykuEzaNs
11:13 PM Tom_L: wonder what keeps tension on the wire
11:15 PM rue_mohr: probably has a release clutch
11:15 PM rue_mohr: It doesn't spool out at the same rate its turning
11:19 PM Tom_L: well. i'm out
11:19 PM rue_mohr: gngiht
11:20 PM rue_mohr: yea, I think my brain stopped
11:20 PM Tom_L: easier to wind a spool an insert the steel
11:20 PM rue_mohr: I need a foot pedal design
11:22 PM rue_mohr: I got one I thought was a digital only build of a universal, but it wasn't
11:22 PM rue_mohr: thought they would have provisions for analog guts
11:23 PM Tom_L: you want digital or a pot?
11:23 PM rue_mohr: pt
11:23 PM rue_mohr: for both this and my welder
11:23 PM Tom_L: old guitar effects for the base of it
11:24 PM rue_mohr: yup, you would think there would be tonnes around
11:24 PM rue_mohr: hah
11:24 PM rue_mohr: you know what I DO have?
11:24 PM Tom_L: https://www.ebay.com/itm/Generic-Singer-Sewing-Machine-Foot-Control-Pedal-with-Cord-979314-031/391867768334?hash=item5b3d239e0e:g:Q0sAAOSw-05ZpOXb:sc:USPSFirstClass!67213!US!-1
11:24 PM rue_mohr: is a set of pedals for gaming
11:24 PM rue_mohr: hah
11:24 PM Tom_L: there ya go
11:24 PM rue_mohr: two pedals, I can use one for forward and the toher reverse
11:25 PM rue_mohr: Tom_L, I think those sewing ones are a nichrome wound mica strip
11:25 PM Tom_L: i almost bet i got one of those
11:25 PM Tom_L: you could mod it though
11:25 PM Tom_L: maybe
11:25 PM rue_mohr: maybe
11:25 PM Tom_L: just posted for the idea
11:26 PM rue_mohr: :)
11:26 PM rue_mohr: I got one of...
11:27 PM Tom_L: https://www.ebay.com/itm/Pelican-Cobra-TT-Racing-Steering-Wheel-PS2-Playstation-Car-Game-Wired-Controller/223822462670?hash=item341cdbbece:g:q8QAAOSwPsBeLYcR
11:27 PM rue_mohr: https://www.aliexpress.com/item/32952127508.html those, but without a guard
11:28 PM rue_mohr: yea, I'm gonna go find that
11:28 PM Tom_L: why the hell do they make you sign in now?
11:28 PM rue_mohr: Tom_L, I thought the idustrial one would have pot hardware in it
11:28 PM rue_mohr: for ali?
11:28 PM rue_mohr: or ebay?
11:28 PM Tom_L: yup
11:28 PM Tom_L: ali
11:28 PM rue_mohr: ?????
11:29 PM Tom_L: that just has a switch i bet
11:29 PM rue_mohr: that link didn't have the params
11:29 PM rue_mohr: I wonder if they needed to know country
11:29 PM rue_mohr: it was sold as a switch, but I really did think it was a multi-design
11:29 PM rue_mohr: I was going to just install the missing hardware
11:30 PM rue_mohr: https://www.aliexpress.com/item/4000025646619.html
11:30 PM rue_mohr: thats the one I got
11:30 PM rue_mohr: even $20 is dirt cheap for those
11:32 PM Tom_L: https://www.aliexpress.com/item/32873374924.html?spm=a2g0o.detail.1000014.41.170a2809BX1sVS&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.13338.128125.0&scm_id=1007.13338.128125.0&scm-url=1007.13338.128125.0&pvid=d416e982-876d-4869-832f-5ca25f767a5f
11:32 PM Tom_L: just a switch though
11:34 PM Tom_L: https://www.aliexpress.com/item/32846233682.html?spm=a2g0o.detail.1000014.37.170a2809BX1sVS&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.13338.128125.0&scm_id=1007.13338.128125.0&scm-url=1007.13338.128125.0&pvid=d416e982-876d-4869-832f-5ca25f767a5f
11:38 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1150253.jpg
11:42 PM rue_mohr: yes, I'd like one thats definitly not a nichrome wound mica, but I'd like something industrial for the welder too
11:42 PM rue_mohr: the throttle one is amusing tho
11:43 PM rue_mohr: I kinda needed a forward/reverse thing tho, so that foot pedal set is perfect for this
11:44 PM rue_mohr: https://www.aliexpress.com/item/4000074842131.html
11:45 PM rue_mohr: I think you hit the mark with "throttle pedal"
11:55 PM rue_mohr: ok, work tommorow