#avr Logs
Mar 27 2017
#avr Calendar
12:01 AM daey_ is now known as daey
12:23 AM xentrac: I just sorted through my electronics stuff and found the huge pile of ATTiny2313s, ATTiny45s, and whatnot that I had sort of forgotten about
12:25 AM xentrac: all kind of worthless unless I plug them in
12:28 AM Casper: huge being how many?
12:56 AM xentrac: only about 64
12:56 AM xentrac: like, definitely between 32 and 128
01:38 AM polprog: wow, thats a pile
01:39 AM xentrac: the whole pile cost less than a good soldering iron
01:39 AM xentrac: in 2006
01:44 AM polprog: wow
01:44 AM polprog: where i buy, m16 is like 4$
01:44 AM polprog: the cheapest price in pl
01:53 AM xentrac: yeah, there are only like five megas in the whole pile
02:26 AM polprog: ill be laying out the mosfet pcb when im back home today
02:32 AM polprog: how can i calculate the proper cooling pad size?
02:35 AM xentrac: I'm not sure what you're doing with the MOSFETs and I may not be a good person to ask anyway
02:37 AM xentrac: but basically if you can calculate the voltage drop from the source to the drain, and the current, you can multiply them to get the power, and that tells you how big you need to make the pads (or other heatsink) to carry away the generated heat
02:37 AM xentrac: you probably knew that already and were asking how big to make the pads given that you have already calculated a TDP of 60 watts or whatever
02:38 AM polprog: that i dont know the tdp yet
02:41 AM xentrac: oh, well, multiply I and V
02:41 AM xentrac: after that TI has a primer in this appnote that looks decent: http://www.ti.com/lit/an/snva419c/snva419c.pdf
02:43 AM polprog: what i dont is how big the pad should be
02:43 AM xentrac: that depends on how much power you are dissipating
02:48 AM polprog: that ti paper looks good, thanks
02:50 AM xentrac: :)
02:59 AM Emil: Lambda_Aurigae: 1284: RAM Bytes16
02:59 AM Emil: ":D"
03:23 AM Thrashbarg_ is now known as Thrashbarg
03:36 AM skz81: #esp32
03:36 AM skz81: oups, sorry
04:02 AM Haohmaru: i'm getting a reset with an unknown cause on an xmega.. RST.STATUS seems to be 0x00
04:03 AM Haohmaru: what could it be? i found some old avrfreaks thread mentioning that this could be possible if the program counter goes nuts and comes back to 0
04:13 AM Jartza: Haohmaru: maybe your code is running out from the end of flash :D
04:14 AM Haohmaru: :/
04:14 AM Haohmaru: why would it?
04:15 AM Haohmaru: weirdly, out of maybe 7 such devices in different places, only some of them do this
04:16 AM skz81: Haohmaru, found a topic, the same as you I guess... They're talking about brown-out detection. Do you use it ? Unsure what happends if not enabled and you have a Vcc problem
04:17 AM skz81: btw : http://www.avrfreaks.net/forum/xmega-resets-itself-rststatus-0
04:18 AM skz81: ok, misread.... Probably NOT a Vcc problem
04:23 AM tkoskine_ is now known as tkoskine
05:27 AM cehteh_ is now known as cehteh
05:42 AM Lambda_Aurigae: Emil, 16K ram....
05:42 AM Lambda_Aurigae: and dual usarts
06:25 AM Emil: Lambda_Aurigae: i know
06:26 AM Emil: Lambda_Aurigae: but look at the product pafe
08:24 AM Emil: Hmm
08:25 AM Emil: Who was it that recommended me the aliexpress led strip seller?
08:25 AM Emil: Came today, looks really good
08:25 AM Emil: Testing it soon
08:25 AM Emil: And buing moar :D
08:25 AM Emil: Also need to buy a lot beefier power supplies :D
08:25 AM Emil: LeoNerd: was it you?
08:31 AM LeoNerd: I don't believe so. I generally dislike aliex
08:32 AM LeoNerd: I used them once ever, which was to buy a dual-output PSU because I could not find one anywhere else. Though coincidentally yesterday I managed to find another one on eBay, so I bought that
09:09 AM Lambda_Aurigae: Emil, looks like microchip needs to do a little proofreading...higher up on the page it says 16K
09:19 AM Emil: LeoNerd: it was actually on #arduino ":D"
09:19 AM LeoNerd: Ah
10:16 AM Haohmaru: i have 10k pullup on the reset/pdi pin..
10:17 AM Haohmaru: if i grab a metal pin and touch the reset contact with it - boom it resets the chip
10:17 AM Haohmaru: is that normal?
10:18 AM skz81: You seems highly grounded !
10:26 AM polprog: i finished laying out the mosfet driver, could you guys please take a look to see if there re any rookie mistakes?
10:28 AM polprog: the thermal part is not sone yet
10:28 AM polprog: https://puu.sh/v08YI/503c0217d3.png
10:48 AM Emil: Haohmaru: if your capacitance is grounded, yes
10:48 AM Emil: polprog: making it diy?
10:48 AM Emil: or ordering?
10:49 AM Emil: In any case, since you are not having any high density routing, increase the width of all traces
10:49 AM Emil: You won't lose anythin and it is more reliable
10:49 AM polprog: Emil: thanks for the tip
10:50 AM polprog: im ordering it
10:50 AM Emil: polprog: are you driving inductive loads?
10:50 AM Emil: If so, add the possibility of a protection diode if you can
10:50 AM Emil: and also use copper pours
10:51 AM Emil: On the right, under track, select copper pour, draw an area and select appropriate settings
10:51 AM Emil: you can easily update it by pressing b/ctrl+b
10:51 AM Emil: Also why is your gnd track so tiny on the mosfets?
10:52 AM Emil: It doesn't help if your load to drain track is wide if your gnd track is thin :D
10:53 AM polprog: Emil: ill be making a copper por to gnd on the mosfet pins and the low power side
10:54 AM polprog: there's a diode inside the MOSFET, isn't it sufficient?
10:54 AM polprog: i'll put a diode there ofc
10:54 AM Emil: no that's not the same
10:54 AM polprog: ok
10:54 AM polprog: i'll put a diode there
10:55 AM Emil: You aren't listening :D
10:56 AM Emil: https://bennthomsen.files.wordpress.com/2014/12/driver.png if possible to add a diode in parallel with the load, I would add the possibility
10:57 AM Emil: But you can rig that however you want, no need to add it to the board if not suitable or applicable
11:00 AM Emil: polprog: spotted a rookie mistake
11:01 AM Emil: polprog: you don't have a ground pin for the raspi connector
11:02 AM polprog: Emil: oh, thanks
11:03 AM polprog: for the raspi
11:03 AM polprog: and ill remember to put the diode on the load
11:03 AM Emil: good
11:03 AM Emil: what driver is this btw?
11:03 AM Emil: What are you controlling?
11:03 AM polprog: big fans, from a server
11:03 AM Emil: allrighty
11:03 AM polprog: so it's just a big motor
11:03 AM Emil: yeah
11:04 AM polprog: The biggest one is 12V 2.4A
11:04 AM Emil: hmm, I wonder if they already have diodes in them, probably not
11:04 AM polprog: they are compuer fans, ill put one just to be sure
11:04 AM polprog: *computer
11:05 AM polprog: im making the traces thicker, from 0.25 mm to .4
11:06 AM polprog: damnit
11:06 AM polprog: .4 is too thick
11:08 AM Emil: eh?
11:08 AM Emil: Looking at your layout
11:09 AM Emil: You should easily be able to make them 1mm thick
11:09 AM Emil: all of the small ones, too
11:09 AM polprog: maybe... ill have to redo the layout
11:09 AM Emil: polprog: why?
11:09 AM Emil: I don't see an issue with it
11:10 AM polprog: the +12V net goes areound the dicrete componets, under resistors and stuff
11:10 AM polprog: the back side is reserved for high current stuff
11:10 AM Emil: polprog: also, people usually route signals, then if necessary vcc and finally copper pour ground
11:10 AM Emil: oh I see
11:11 AM Emil: They were just asymmetrically placed under the components
11:11 AM Emil: polprog: is your aim to pwm the motors?
11:11 AM polprog: no
11:11 AM Emil: Okay
11:12 AM Emil: Because personally :D I would have added a small microcontroller to do pwm just because I can and talk to the raspi through uart
11:12 AM Emil: but that increases bom so eh, if on/off is good enough then not needed
11:12 AM polprog: uart on the raspi is reserved for boot, and the aim is to enable and disable fans via a web interface
11:12 AM polprog: think of a hoovercraft
11:12 AM polprog: but floating on water
11:13 AM polprog: anyways, ill have to find a simpler paper on calculating thermal stuff
11:13 AM polprog: i cant get my head aroud that TI
11:14 AM polprog: btw that's how the 12V is distributed across the 4 transistor converter units
11:15 AM polprog: https://puu.sh/v0blF/e3254e13ba.png
11:15 AM Emil: polprog: mate, just estimate :D
11:15 AM polprog: :(
11:15 AM Emil: your 12V 2.4A is _NOTHING_
11:15 AM polprog: how do i estimate, m8?
11:15 AM Emil: YOu don't even need a heatsink for controlling that
11:16 AM polprog: the calculated power dissibation on the mosfet is I^2/R = 1Watt
11:16 AM polprog: the traces ale calculated for 3 amps
11:17 AM polprog: maybe you are right but i'd really like to put some thermal stuff there
11:17 AM polprog: like a copper heat spreader
11:17 AM Emil: polprog: eh? your power dissipation on the mosfet is I^2*R
11:17 AM Emil: and R is RDS_on
11:18 AM polprog: yes i2*r
11:18 AM Emil: if your RDS_on is like 10mOhm that's 0.1W
11:18 AM Emil: at 3A
11:23 AM Emil: http://www.mouser.fi/search/ProductDetail.aspx?R=0virtualkey0virtualkeyNTMFS4925NT1G here you go
11:24 AM Emil: YOu don't even need your transistor thing do drive it
11:24 AM Emil: You can drive it directly from the GPIO
11:25 AM Emil: Though I do still recommend having that transistor network
11:26 AM polprog: that transistor network shifts 3v3 logic signals to a voltage that is above the gate threshold voltage
11:26 AM polprog: and pi's output is 3v3
11:26 AM Emil: polprog: look at the datasheet
11:26 AM polprog: so it cant directly drive most of the pieces of p16nf06
11:27 AM Emil: polprog: -.-
11:27 AM Emil: mate you do you not listen?
11:27 AM polprog: Vgs(th) is min=2 max=4
11:27 AM Emil: sigh
11:27 AM Emil: can you not even open that link?
11:28 AM polprog: oh, that's a nice pi-comaptible mosfet
11:28 AM polprog: sorry
11:28 AM polprog: thanks for that link
11:28 AM Emil: http://www.mouser.fi/Semiconductors/Discrete-Semiconductors/Transistors/MOSFET/_/N-ax1sf?P=1yzxnagZ1z0y3zr&Rl=ax1sfZgjdhp5Z1yq6jdzZ1yw8py4SGTax1sfZgjdhp2Z1yw6zslZ1yw76elSGTax1sfZgjdhp3Z1yw78ilZ1ypyl4zSGTax1sfZgjdhozZ1ygsxshZ1y9kwqtSGT&Ns=Pricing%7c0
11:29 AM JanC_ is now known as JanC
11:29 AM polprog: hmm
11:30 AM polprog: looks like i bought wrong mosfets -.-
11:30 AM Emil: http://www.mouser.fi/ProductDetail/Infineon-Technologies/BSO033N03MS-G
11:30 AM Emil: This is like 6 pages into the listing
11:30 AM Emil: 2.7mOhm RDS_on, 1V Th (though you want to always drive with moar)
11:31 AM Emil: Continuous 22A, 30V breakdown
11:31 AM polprog: i get it now
11:31 AM Emil: ;)
11:31 AM polprog: looks like the next rev will be tiny, with so-8 mosfets
11:31 AM Emil: Your whole bom is now 3 connectors, 4 mosfets and 4 pulldown resistors
11:31 AM polprog: :D
11:32 AM polprog: ill redesign stuff
11:32 AM Emil: You should just abandon v1
11:33 AM polprog: that's what im doing now
11:33 AM polprog: and v2 get designed tomorrow
11:33 AM Emil: do it today, so easy and quick
11:33 AM Emil: no routing needed ;)
11:33 AM polprog: ;) dinner now,
11:33 AM Emil: ah
11:33 AM Emil: I should get food, too
11:33 AM Emil: Good point
11:33 AM polprog: thanks very much for you help Emil :) i'll be back in 30min
11:33 AM Emil: polprog:np
11:34 AM polprog: doing "homework"
12:04 PM polprog: what on earth tme
12:04 PM polprog: can categorize by threshold GS voltage
12:04 PM polprog: can't*
12:05 PM polprog: fortunately they have the ones you sent me in stock
12:25 PM Emil: polprog: yes you can
12:25 PM Emil: polprog: that link I gave you already has filters on
12:26 PM Emil: polprog: don't just take what I give you :D look around also
12:26 PM polprog: i mean TME.eu cant filter by threshold
12:26 PM Emil: ah
12:27 PM polprog: im making a kicad symbol for the mosfet, that 33n03 looks good
12:56 PM polprog: enough for today
01:14 PM Ord: Hello
01:23 PM Lambda_Aurigae: olleH
01:24 PM polprog: privet
01:25 PM Lambda_Aurigae: over yonder behind the barn.
01:29 PM Ord: Hello I'm fairly new are there any good books or resources on the build process? I'm confused on a couple basic things
01:29 PM polprog: there's nothing complicated in it
01:29 PM polprog: no need to write books
01:31 PM polprog: in fact, you compile it like usual C, the only additional thing you pass to the compiler is the MCU type
01:31 PM polprog: then it makes object files (?) and then finally a flashable .hex file
01:31 PM polprog: *hex file
01:31 PM Ord: Ah well I suppose I need to look up C
01:31 PM polprog: yeah ;)
01:31 PM Ord: We never go into details in class.
01:32 PM Ord: But from what I gather the source code is compiled into an elf file right?
01:32 PM Lambda_Aurigae: then converted to intel ihex file.
01:33 PM Lambda_Aurigae: which is a text based representation of the data.
01:33 PM Ord: Yeah.
01:33 PM Lambda_Aurigae: that gets uploaded with something like avrdude
01:33 PM Ord: So there's different sections.
01:33 PM Lambda_Aurigae: can be, yes.
01:33 PM polprog: it's all usual until the hex file
01:33 PM Ord: I've looked them up in documentation, but I'm confused
01:34 PM Lambda_Aurigae: every line of an ihex has a starting address, some data, and a checksum.
01:34 PM Ord: The hex file includes .data and .text
01:34 PM Ord: That's what is important for the MCU
01:34 PM Lambda_Aurigae: that's your program and variables, yes.
01:35 PM Ord: and unless my source code includes stuff involving eeprom the .eep section will be empty right?
01:35 PM Lambda_Aurigae: yup.
01:35 PM Ord: Ok.
01:36 PM Ord: What about .bss?
01:36 PM Lambda_Aurigae: are you working in linux, windows, or mac?
01:36 PM Lambda_Aurigae: really, unless you are doing some strang stuff,,,you don't need to worry about all that.
01:36 PM Ord: Well windows right now
01:36 PM Lambda_Aurigae: using command line tools or atmel studio?
01:37 PM Ord: command line tools
01:37 PM Ord: cmake avr-gcc
01:37 PM Lambda_Aurigae: never used cmake
01:37 PM Lambda_Aurigae: I just use make
01:37 PM Lambda_Aurigae: but, I don't use windows either.
01:37 PM Ord: What do you normally use?
01:37 PM Lambda_Aurigae: linux
01:38 PM polprog: ;)
01:38 PM Lambda_Aurigae: with the gcc toolchain...avr-gcc, avr-libc, binutils-avr, make, and whatever text editor is handy.
01:38 PM Ord: I really like it for class, everything is lot simpler to set up normally
01:38 PM Ord: But the .bss section it's for uninitialized variables
01:39 PM Ord: Why isn't it needed for the mcu
01:39 PM Lambda_Aurigae: no clue...it might be in there.
01:39 PM Lambda_Aurigae: the hex file doesn't care
01:39 PM Lambda_Aurigae: it just has line by line of data to write to the chip.
01:40 PM Ord: Yeah I've got that down now finally.
01:40 PM Ord: Or what is a formal definition of a unitialized variable in regards to the mcu
01:41 PM polprog: this depends
01:41 PM Ord: Does the .bss section mean unitialized variables that are never used? Or just unitialized at runtime
01:41 PM polprog: the compiler might just optimize-it-out
01:41 PM Lambda_Aurigae: no clue what you are asking....make a simple program and setup a couple of variables and look at the assembly output.
01:41 PM polprog: if it's unused
01:42 PM Ord: Thanks
01:42 PM Lambda_Aurigae: aaand, I gotta go back to worky.
01:42 PM Ord: Have fun
01:42 PM specing: Does anyone know how the connector that goes onto lead acid car battery's terminals called?
01:43 PM specing: I need one that has a wire out and can do 1000A+ pulses
01:43 PM specing: well.... two :)
01:43 PM polprog: i think they are just screw terminals
01:44 PM polprog: you mean the metal rings you crimp on the phat cables?
01:44 PM Ord: Yeah
01:44 PM Ord: I know there are different types
01:44 PM specing: pictures are here: https://www.instructables.com/file/F9T2A70IZYGNH8M/
01:45 PM Ord: I think they are just battery terminal adapters
01:46 PM specing: maybe ring terminal adapter
01:47 PM polprog: that the teriible kind of connector nobody knows the proper name of
01:47 PM Ord: top post ring terminal adapter
01:47 PM Ord: Yeah that sounds good
01:47 PM polprog: just like screw terminals, which are made by degson
01:52 PM specing: Ord: Octopart throws up 7 pages with no distributors :/
01:52 PM polprog: specing: lemme search in polish at some place
01:53 PM specing: But its close though ,the images line up somewhat
01:53 PM polprog: http://www.tme.eu/pl/katalog/zlacza_46/#id_category=100467&page=1&s_field=artykul&s_order=ASC
01:53 PM Lambda_Aurigae: car battery terminal connector.
01:53 PM polprog: it should be in english if you change the language
01:54 PM specing: "Aby zobaczyć listę produktów, wybierz jedną z podanych grup"
01:54 PM specing: I think the link is not working properly ;/
01:55 PM polprog: oops
01:55 PM polprog: http://www.tme.eu/gb/katalog/#id_category=100467&page=1&s_field=artykul&s_order=ASC
01:55 PM polprog: english version
01:55 PM polprog: ;)
01:56 PM Ord: Is this a good site?
01:57 PM polprog: it's just another electronic parts distributor
01:57 PM Ord: I was looking at transformers there awhile ago
01:57 PM Ord: I mean in the EU
01:57 PM polprog: i use it mainly because they have a warehouse in poland and it's cheap postage
01:57 PM specing: polprog: sitll, it shows me a category selector
01:57 PM Ord: I'm new here
01:58 PM polprog: specing: the top pictures show different types of connectors, you have typical insulated or noninsuated crimp connectors there
01:59 PM Ord: I have to get ready to go. I just want to leave with this understanding. For building as programming the process summarized looks like this. 1. Compile Source Code to an elf file 2. Extract .data and .text sections only(unless there's .eep business somewhere) 3. Convert .data and .text to intel hex file 4. Program to flash memory 5. Hope for the best?
02:01 PM polprog: ord: wait a mo ill throw a link on the avr-gcc build process
02:02 PM polprog: https://emil.fi/avr 5th point ;)
02:02 PM polprog: btw the guy is on this channel
02:02 PM specing: > without any GUI shit
02:02 PM specing: I approve of the ASCII art
02:02 PM polprog: or any ardweeny hal
02:03 PM polprog: the ascii art is 10/10
02:03 PM Ord: Lol
02:03 PM Ord: Thanks
02:04 PM Ord: You have a good night
02:04 PM polprog: good night o/
02:47 PM specing: Can't find these connectors
02:48 PM specing: perhaps I should cannibalise starter cables
02:48 PM polprog: it's the problem with online shops
02:48 PM polprog: you'd have to browse the entire mouser/whatever catalog
02:49 PM polprog: if i need stuff like that i just visit the local electical equipment shop
02:50 PM specing: yeah but the markup is damn YUUUGEEEE there
02:50 PM specing: and I still need vhry high current wires
02:50 PM specing: the only diff is that these starter cables have clips and not a connector on them
02:51 PM specing: which is good in that it is easier to use
02:51 PM specing: but I don't know ... it might add too much resistance
02:51 PM specing: for welding
02:51 PM polprog: ah i remember, you're making a welder?
02:52 PM specing: y
02:53 PM polprog: you might find this interesting
02:53 PM polprog: http://electricstuff.co.uk/destructotron.html
03:02 PM specing: holy sheet
03:03 PM polprog: yeah
03:03 PM polprog: he's got a cool yt channel by the way
03:03 PM aczid: lol wow
03:33 PM Arlenx: hi, i'd like to write some code to drive IR led using NEC protocol.should i need to generate a PWM of 38khz for IR transmitter? do i need to set timer pwm and set it to generate PWM at 38khz for AGC burst of 9ms?
03:38 PM xentrac: the NEC protocol is PWM?
03:38 PM Arlenx: xentrac, dunno, i want to know how to generate 38khz
03:40 PM Arlenx: is pwm the acceptable technique for this? or should i just use ON..wait few micro sec...OFF and do it in loop?
03:42 PM Casper: PWM for IR is the way to go
03:42 PM Casper: set pwm to 50%
03:42 PM Casper: or 0%
03:45 PM Arlenx: Casper, ok thnaks
03:46 PM xentrac: cool :)
05:28 PM Emil: no one links to my guide
05:28 PM Emil: I am dissappoint
05:28 PM Emil: nowait
05:29 PM Emil: polprog you beautiful person :D
05:35 PM Emil: hmm, have to fix text wrapping
05:37 PM Emil: bettee
05:37 PM Emil: better*
05:42 PM Emil: polprog: where did you get your scope btw?
05:57 PM arij is now known as arij_work
06:21 PM Lambda_Aurigae: specing, check with an auto parts store maybe?
06:23 PM hetii: Hi :)
06:26 PM postmodern: could a 20Mhz atmega chip (with external oscillator) handle 31250 baude serial I/O?
06:27 PM postmodern: trying to get to the bottom of some FUD about atmega's UART reliability
06:28 PM Lambda_Aurigae: possibly.
06:28 PM Lambda_Aurigae: have you checked with the baud rate calculator?
06:28 PM hetii: Anyone use SE8R01 (similar to RF24l01) and have it not working when use 5 long address?
06:29 PM specing: Lambda_Aurigae: I was thinking about buying starter cables for 10 euro
06:29 PM specing: Lambda_Aurigae: 3m, comes with 4 clips and 2*3m of thick cabling
06:29 PM Lambda_Aurigae: specing, I thought you wanted the kind that are permanent/semi-permanent.
06:30 PM Lambda_Aurigae: not giant alligator clips.
06:30 PM Lambda_Aurigae: http://wormfood.net/avrbaudcalc.php?bitrate=31250&clock=20&databits=8
06:30 PM Lambda_Aurigae: there postmodern
06:30 PM Lambda_Aurigae: looks like it should work just fine.
06:31 PM specing: Well... I want something that would work
06:32 PM specing: easily attachable+removable is a plus if I have to make our family ride inoperable for welding
06:32 PM Lambda_Aurigae: https://www.delcity.net/store/Universal-Lead-Battery-Terminal/p_14433.h_100650.r_IF1003?mkwid=s3tqz8gFS&crid=38094426869&mp_kw=&mp_mt=&gclid=CJuE1rrl99ICFZC6wAod5IMDmg
06:33 PM postmodern: Lambda_Aurigae, thank you
06:33 PM Lambda_Aurigae: postmodern, welcome.
06:33 PM Lambda_Aurigae: Wormfood used to hang out in here...he created that.
06:33 PM Lambda_Aurigae: haven't seen him in a while.
06:35 PM Lambda_Aurigae: specing, I would replace the nut on that with a big honkin wingnut.
06:36 PM Lambda_Aurigae: specing, those will give you a much better connection than giant alligator clips.
06:37 PM specing: it would be great if I could find something like this on farnell
06:37 PM specing: because I'm willing to bet that $3 for thatterminal and shipping would exceed the price of new starter cables
06:38 PM specing: and I'd get gratis thick wire in those
06:38 PM Lambda_Aurigae: where do you live? country?
06:38 PM specing: plus I only need 500A+ (1000A+? idk) for <20ms
06:38 PM specing: Slovenia
06:39 PM Lambda_Aurigae: http://unioil.si/
06:41 PM Lambda_Aurigae: I would search their site but don't know "battery cable" or "battery terminal" in your language.
06:41 PM Lambda_Aurigae: english search doesn't work.
06:41 PM specing: hah I wish I knew
06:41 PM Lambda_Aurigae: supposed to be a semi-local company.
06:41 PM specing: So you say that any car parts company should have these things?
06:42 PM Lambda_Aurigae: yup.
06:42 PM Lambda_Aurigae: might even have them on the end of a cable already.
06:42 PM specing: ok
06:42 PM Lambda_Aurigae: here I can go to any auto parts store and get them.
06:51 PM specing: Lambda_Aurigae: found it, it is called "akumulatorska sponka/klema"
06:52 PM specing: but on a different site, since that one you pasted is quite far away
06:54 PM specing: It has no pictures though, so Idk what 24-50mm^2 and (PLUS 19MM) and (MINUS 17MM) are referrin gto
06:54 PM specing: the first one might be the supported wire thickness
06:54 PM specing: the second one ... battery terminal width? Is the plus terminal wider?
06:55 PM Lambda_Aurigae: plus and minus are the battery posts.
06:55 PM Lambda_Aurigae: positive post is thicker than negative post.
06:55 PM specing: aaah k
06:56 PM specing: so basically this is it
06:56 PM Lambda_Aurigae: there are generic ones like I posted link to and some that are made for specific posts.
06:56 PM specing: Now I need welding electrodes and 3 pieces of up to 40cm long thick wire
06:57 PM Lambda_Aurigae: well, for the wire,,,
06:57 PM * Lambda_Aurigae looks up at the power lines.
06:57 PM specing: and a source/drop-in-replacement for VS-100BGQ015 schottky since Farnell doesen't stock it
06:57 PM specing: then I'll have all the parts, more or less
06:58 PM Lambda_Aurigae: got any junkyards around?
06:58 PM Lambda_Aurigae: auto junk yards?
06:59 PM Lambda_Aurigae: you can likely get cable and battery terminals there fairly cheap.
06:59 PM specing: I have one thick wire, but I don't think it is thich enough
07:00 PM specing: afaik it is about 10mm^2
07:00 PM specing: copper
07:00 PM specing: and I don't know of any [auto] junkyards around me :/
07:09 PM specing: What do you suggest to take for electrodes?
07:10 PM specing: does farnell stock anything usable?
07:13 PM Lambda_Aurigae: no clue
07:13 PM Lambda_Aurigae: never really looked at farnell site.
07:14 PM specing: Farnell has the cheapest shipping to here
07:14 PM specing: by far
07:14 PM specing: "Pure red copper, length 45mm, diameter 6mm. "
07:14 PM Lambda_Aurigae: I've not built a spot welder other than for futzing around with either.
07:14 PM specing: "It is important that the electrodes are made of the right material, not all types of copper are suitable."
07:14 PM specing: Now is your chance ;D
07:14 PM Lambda_Aurigae: no need for one.
07:15 PM specing: how so?
07:15 PM Lambda_Aurigae: I have
07:15 PM Lambda_Aurigae: no
07:15 PM Lambda_Aurigae: need
07:15 PM Lambda_Aurigae: for
07:15 PM Lambda_Aurigae: one
07:15 PM specing: :( create a need for it
07:15 PM Lambda_Aurigae: I don't do much work in metal
07:15 PM Lambda_Aurigae: for when I do, I have a friend who has a full metal working shop
07:15 PM specing: not metal
07:16 PM specing: batteries
07:16 PM Lambda_Aurigae: no need for welding batteries either.
07:16 PM Lambda_Aurigae: if I were going to make a spot welder it would have to be able to weld sheet steel up to 1/8 inch thick.
07:17 PM specing: https://www.aliexpress.com/item/10-Pieces-lot-Spot-Welding-rods-needles-Electrodes-for-Spot-Welder/32590213928.html?spm=2114.01010208.3.129.OQ9QF7&ws_ab_test=searchweb0_0,searchweb201602_2_10065_10068_433_434_10136_10137_10138_10060_10062_9958_10141_10056_10055_10054_128_10059_10531_10099_10530_10103_10102_10096_10052_10144_10053_10050_10107_10142_10051_10143_10526_10529_10084_10083_10080_10082_10081_10110_10
07:17 PM specing: 111_10112_10113_10114_10078_10079_10073_10070_10122_10123_10124-9958,searchweb201603_6,afswitch_1,ppcSwitch_4,single_sort_0_default&btsid=b7967e69-12e7-4661-80a3-2271dcca0472&algo_expid=d6a44dc5-c868-4592-9377-9c961bb6b44d-14&algo_pvid=d6a44dc5-c868-4592-9377-9c961bb6b44d
07:17 PM specing: foend em
07:17 PM specing: ffs aliexpress fix your urls and stop spammign coupons into my face
07:18 PM * specing raeg
08:15 PM Snert: chop off everything after the .html
08:15 PM Snert: all the ?spm...and all the rest.
08:16 PM Snert: ... and have a beverage while you're at it. Let the rage flow throoo yooo
10:21 PM arij_work is now known as arij
11:13 PM Tom_itx is now known as Tom_L