#avr Logs
Mar 25 2017
#avr Calendar
12:52 AM jsoft: lol
12:54 AM jsoft: I went to fix my cars window just now, wondering why a) the window kept falling down and b) the window button done nothing ( no noise or anything ). I pulled it apart, to find two elaborate bits of 2x4 which used to push the glass up had fallen out of position. No mechanism to speak of for the electric window stuff.
12:56 AM Casper: you bought a car with that mod?!?
12:57 AM jsoft: I bought the car because it had an auto transmission.
12:58 AM jsoft: I got sick of driving a manual in the town I was staying at ( Auckland ) so I just bought it. Cost not much.
12:58 AM dgriffi2: you bought a lemon
12:59 AM jsoft: Meh
12:59 AM jsoft: I dont need that particular window
01:02 AM Casper: one day you may just get a mechanism from a junkyard
01:04 AM jsoft: Yeah perhaps. But really im going to sell it soon anyways
01:06 AM Casper: to return to manual?
01:07 AM jsoft: No to sell because the car was a stop gap
01:07 AM jsoft: I still have the other manual car
01:11 AM Casper: stop gap?
01:12 AM jsoft: As in temporary
01:12 AM Casper: oki
01:12 AM jsoft: I just thought it was hillarious someone went to the trouble of cutting wood to fix it
01:14 AM daey_ is now known as daey
03:47 AM Thrashbarg_ is now known as Thrashbarg
05:50 AM Emil: Anyone know of an easy to use "single file" crypto lib? Chacha20+poly1305 for example
12:30 PM rue_bed: not aware of one
12:30 PM rue_bed: you want to do it on a 8 bit microcontroller?
12:31 PM rue_bed: your aware of how much memory they have?
12:31 PM julius_: hi
12:31 PM rue_bed: low
12:32 PM specing: Between zero and none
12:32 PM specing: 'bout tree fiddy
12:33 PM julius_: i just played my first mp3 player on a arduino mp3 shield...with a VLSI1053. works quite ok, have to check the sound quality a bit longer but it seems to be ok
12:33 PM rue_bed: tea time
12:33 PM julius_: now im wondering if one could solder a LQFP48 7x7x1.4mm chip at home
12:33 PM julius_: because the arduino and mp3 shield are a bit to big for a portable player
12:34 PM rue_bed: huh, I forget what the decoder chip I got was
12:34 PM rue_bed: what you storing on?
12:34 PM julius_: currently sd card
12:34 PM rue_bed: via avr or vlsi?
12:34 PM specing: julius_: whats the pitch?
12:34 PM julius_: oh
12:34 PM julius_: one sec
12:34 PM specing: julius_: I've done 0.85mm pitch tqfp at home
12:35 PM specing: soldering was the easy part, making the PCB was hard
12:35 PM rue_bed: thats about a d#
12:37 PM rue_bed: wtf happened to tom
12:37 PM rue_bed: i'm still worried
12:37 PM julius_: specing, kinda hard to find that information
12:37 PM specing: julius_: look at the technical drawing i nthe datasheet
12:43 PM julius_: theres one...but it just shows the first pin
12:43 PM julius_: somehow i cant find the pitch/space between the pins
12:44 PM specing: thats because you are functionally blind
12:44 PM specing: like most people coming here for help these days
12:46 PM Emil: specing: sometimes the drawings are shit and nowadays there is no reason to omit that pin information :D but you are still quite correct
12:46 PM julius_: you maybe right...but going over the index in this: https://www.sparkfun.com/datasheets/Components/SMD/vs1053.pdf shows me page13 for that information, the rest is about resisters and software
12:47 PM Emil: julius_: that documwmt is clear as day
12:48 PM specing: Emil: I remember our head teacher (of class, not school) in highschool called us functionallu illiterate a few times per month
12:49 PM Emil: hehehe
12:51 PM specing: and she was absolutely right
12:51 PM julius_: LQFP48 7x7x1.4mm maybe 1,4 is the pitch and not the height
12:51 PM Emil: lol mope
12:53 PM Emil: actually yes yes use that value
12:53 PM specing: Wait what, that chip supports FLAC and Ogg vorbis as well? Nice to see open formats sticking
12:53 PM Chillum: "Lead pitches available for LQFP package are 0.4mm, 0.5mm, 0.65mm and 0.8mm."
12:54 PM Chillum: oh wait, that is not an exhaustive list, ignore me
12:56 PM julius_: where did you find that?
12:56 PM julius_: flac was a surprise for me too
12:56 PM Emil: on wikipedia probably
01:01 PM Chillum: it was from here http://www.practicalcomponents.com/dummy-components/product.cfm?Low-Profile-Quad-Flat-Pack-(LQFP)-Dummy-Component-C716B832B0D1821D and I completely misinterpreted what the page was talking about
01:01 PM Chillum: it is not even describing LQFP but rather their product
01:03 PM julius_: ah
01:03 PM julius_: well, the pins on my board look like less than 1mm apart
01:04 PM specing: Emil: do you have any dual pulse spot welders?
01:04 PM julius_: https://ae01.alicdn.com/kf/HTB1bN6xIpXXXXXRXXXXq6xXFXXXa/20pcs-LOT-QFN48-QFP48-turn-DIP48-QFN44-QFP44-turn-DIP44-0-5MM-IC-adapter-Socket-Adapter.jpg_640x640.jpg something like that would bring the pins out, but if that is possible to solder i dont know
01:09 PM julius_: rue_bed, vs1053 is the chip
01:11 PM julius_: specing, it does not play all .flac files...apparently the one i downloaded do play on my laptop but not on the board
01:42 PM Emil: specing: hm?
01:43 PM specing: Emil: I want one :(
01:51 PM Emil: Now I want one, too
01:52 PM specing: excellent
01:54 PM Emil: No, no, not excellent :D
01:57 PM specing: :)
01:58 PM specing: http://www.instructables.com/id/DIY-Arduino-Battery-Spot-Welder/
03:45 PM Snert__: huh. cute, but no thanks lol
03:45 PM Lambda_Aurigae: I was hoping they were spot welding batteries to an ardweeny board.
03:45 PM Lambda_Aurigae: but nooooo.
03:53 PM specing: Lambda_Aurigae: lol
03:53 PM specing: there are 2-3 dual pulse spot welder projects in various states of opennes
03:54 PM specing: the one I linked is the most open, but another uses better mosfets (just one, because its one beefy AF mosfet)
03:55 PM Lambda_Aurigae: if it isn't at least 400% overrated it's not big enough.
03:55 PM specing: its 1500 amps pulse
03:55 PM specing: at 24V max
03:57 PM specing: TVS diode and schottky handle the massive avalanche when closing it
04:01 PM specing: 429A continous drain current
04:02 PM specing: its one heck of a fet :D
04:09 PM naquad: hi
04:09 PM Lambda_Aurigae: ih
04:09 PM naquad: is there some example of i2c slave implementation on attiny2313a? googling for a while and can’t find it
04:10 PM Lambda_Aurigae: https://github.com/nikharris0/usi-i2cslave
04:11 PM Lambda_Aurigae: https://github.com/BlackBears/ATtiny2313-I2C-Slave-Test/blob/master/ATTINY_2313_I2C_SLAVE_TEST/usiTwiSlave.c
04:11 PM Lambda_Aurigae: third and first google hits when searching for attiny2313 slave
04:12 PM Lambda_Aurigae: http://www.atmel.com/Images/Atmel-2560-Using-the-USI-Module-as-a-I2C-Slave_ApplicationNote_AVR312.pdf
04:12 PM naquad: HOW? 0_0 are you a google ninja?
04:12 PM Lambda_Aurigae: official atmel documentation
04:12 PM Lambda_Aurigae: https://www.google.com/search?client=ubuntu&channel=fs&q=attiny2313+i2c+slave&ie=utf-8&oe=utf-8
04:12 PM naquad: last one i’ve seen but that didn’t clarify stuff
04:12 PM Lambda_Aurigae: that's my google search.
04:12 PM naquad: i’ve been googling attiny2313a
04:13 PM naquad: thank you very much :)
04:14 PM Lambda_Aurigae: welcome
04:14 PM Lambda_Aurigae: that will be $10.00 payable via paypal for google search.
04:18 PM naquad: :D write on my tab
04:19 PM Tachyon` is now known as Tachaway
04:22 PM * Lambda_Aurigae writes "overdue, break kneecap" on the tab
04:23 PM naquad: lol
04:24 PM * Lambda_Aurigae sends it to the enforcers in The Netherlands.
05:06 PM polprog: im proud of myself, i made a raspi compatible mosfet driver with no help :D
09:38 PM Emil: polprog: good, though it shouldnt be hard in the first place ;)
09:38 PM Emil: polprog: share your design so that we can spot for issues
09:48 PM enhering: Hi.
09:54 PM anonnumberanon_ is now known as anonnumberanon
10:10 PM Casper: yes! do share your design so we can destroy it! :D
10:12 PM enhering: How is the weather, Casper? Too cold?
10:12 PM Casper: a bit yes, -6°C
10:12 PM Casper: was +2 today
10:13 PM enhering: I feel pain in my ears at -5C
10:13 PM enhering: Amazing ear thermometer, mine.
10:14 PM Casper: -5 is nice
10:14 PM * enhering is trying to implement a Kalman filter in an AVR.
10:14 PM Casper: my coat is unzipped at that temp if I do anything slightly physical
10:15 PM enhering: yep. Almost warm.
10:16 PM enhering: In Sweden I thought zero C was warm enough to wear a T-shirt outside, until I faced my first wind blow. Bad throat for weeks after that.
10:18 PM Casper: hehe
10:18 PM Casper: I go to the convenience store in tshirt at 0°C
10:18 PM Casper: second neighbour
10:19 PM enhering: In a Kalman filter, what exactly is a state? I read lots of explanations about how the filter works. They all mention this mysterious entity called a state. It is usually a vector, but what goes inside it?