#garfield Logs

Aug 12 2021

12:13 AM rue_mohr: ok
12:20 AM rue_mohr: I think everything but supper is taken care of
04:37 PM Tom_L: 23360
07:06 PM rue_mohr: must be the temp where you are
07:09 PM Tom_L: the odometer rolled over again
07:10 PM rue_mohr: oh
07:13 PM Tom_L: no tellin how many miles i have left
07:20 PM rue_mohr: its like 39
07:20 PM rue_mohr: ugh
07:20 PM rue_mohr: next years temps will be horrid
07:24 PM Tom_L: kinda warm for that far north
07:25 PM Tom_L: was ~100 here
07:25 PM Tom_L: 97 @ 7pm
07:35 PM rue_mohr: so
07:35 PM rue_mohr: I need a via for a bga
07:35 PM rue_mohr: the only via in kicad is 0.8mm
07:35 PM Tom_L: blind?
07:35 PM rue_mohr: no
07:35 PM rue_mohr: just small
07:35 PM Tom_L: you're doing 2 layer
07:36 PM Tom_L: or 4?
07:36 PM rue_mohr: but I'm not sure how small
07:36 PM rue_mohr: 2
07:36 PM rue_mohr: 1 sec
07:36 PM Tom_L: most vias are outside the bga with traces to the pad
07:36 PM Tom_L: that's why they take more layers
07:36 PM rue_mohr: nup
07:37 PM rue_mohr: they put vias to the other layers under the bga
07:37 PM Tom_L: hmm
07:37 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/Untitled.png
07:37 PM Tom_L: has to have a hole then
07:37 PM rue_mohr: here is no so far
07:37 PM rue_mohr: yep
07:37 PM rue_mohr: a small one
07:37 PM rue_mohr: I'm just not sure how small
07:38 PM Tom_L: can you make parts in kicad?
07:38 PM rue_mohr: I'll need to dig up a kicad bga project on github and see
07:38 PM rue_mohr: yes
07:38 PM rue_mohr: get this tho
07:38 PM rue_mohr: the vias aren't ON the bga pads
07:38 PM rue_mohr: their between them
07:38 PM Tom_L: i did a thermal pad under one of those leadless ones once
07:38 PM rue_mohr: yup
07:39 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/boards/atmega32u4/atmega32U4_3.jpg
07:39 PM rue_mohr: when it cools down a bit
07:39 PM rue_mohr: I have a hot water tank to strip
07:39 PM Tom_L: yeah, it's been too hot to do anything in the garage
07:40 PM rue_mohr: I need a pour for the linear reg heatsink
07:40 PM rue_mohr: I'm thinking of putting a pin header in it as heatsink fins
07:41 PM Tom_L: eagle would fill in all the bare spots on a pour and you could outline where you wanted it
07:41 PM rue_mohr: yea, I'm not sure how to attach a pour to the ground plane
07:41 PM Tom_L: but that takes up too much board space
07:41 PM rue_mohr: didn't do pours in eagle
07:41 PM Tom_L: i tried to mount them with the sinc facing out
07:41 PM Tom_L: label it as gnd
07:42 PM Tom_L: or have it cross over a gnd via
07:42 PM rue_mohr: ... there are lots of kicad tutorials
07:42 PM Tom_L: one of those should do it
07:42 PM Tom_L: and with eagle you could tell it how close to get to things
07:43 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/Untitled.png
07:43 PM rue_mohr: did... I post that yet?
07:43 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/boards/USBTiny_Mkii/USBTinyMkII_1-1a_top.jpg
07:43 PM Tom_L: those are all gnd pours
07:44 PM Tom_L: yes
07:44 PM rue_mohr: kicad is strange
07:44 PM Tom_L: gawd that was 11 yrs ago
07:44 PM rue_mohr: it doesn't just do what you say
07:46 PM Tom_L: does yours still work?
07:47 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/boards/USBTiny_Mkii/USBTinyMkII_1-1c_top.jpg
07:47 PM Tom_L: that must have been one of the last ones, it's got the recovery clock pin on it
07:49 PM Tom_L: what are the switches for on yours?
07:58 PM rue_mohr: ... I have the later one, in the box
07:59 PM Tom_L: oh, i sent a blue one?
08:00 PM rue_mohr: latley you gave me a spare too!
08:07 PM Tom_L: xc2c256
08:07 PM Tom_L: cy7c68013a
08:07 PM rue_mohr: ?
08:07 PM rue_mohr: crap, I have to phone that shipper tommorow!
08:08 PM Tom_L: alvc164245
08:08 PM rue_mohr: I wish I would have ONE normal day at work without issues being piled on me that distract me from everything
08:08 PM Tom_L: those are in the xilinx jtag i have
08:08 PM rue_mohr: 16245 is a 16 bit bidir buffe
08:08 PM rue_mohr: xc---256 sounds like a cpld or fpga?
08:09 PM Tom_L: yes
08:09 PM rue_mohr: cy7 sounds like memory, kinda, the part number doesn't end right
08:09 PM rue_mohr: unless its a processor?
08:09 PM rue_mohr: 68----
08:09 PM Tom_L: where it's at is likely a buffer
08:10 PM Tom_L: near the ribbon
08:10 PM Tom_L: 6 pin holes that are likely the jtag for the jtag :)
08:11 PM rue_mohr: :)
08:13 PM Tom_L: how you gonna solder the bga?
08:15 PM rue_mohr: :) I have no idea
08:15 PM rue_mohr: combination of hot plate and air I think
08:15 PM rue_mohr: if everyone who owns an xbox can do it, so can I
08:17 PM Tom_L: oh?
08:17 PM Tom_L: what are they doing?
08:17 PM rue_mohr: reballing and installing the chips on their xbox
08:17 PM rue_mohr: they are always popping off
08:18 PM Tom_L: upgrades?
08:18 PM Tom_L: ahh
08:18 PM Tom_L: they play too much
08:18 PM rue_mohr: :) yea
08:18 PM rue_mohr: I'm going to ponder my layout
08:18 PM Tom_L: i wonder what happened to that itx board i had quit
08:18 PM rue_mohr: did it have a bga?
08:19 PM Tom_L: i dunno, i didn't pay much attention to it
08:19 PM Tom_L: probably
08:19 PM Tom_L: fanless, covered with a heatsink
09:34 PM Tom_L: couldn't tell if it was or not, it's mounted to a pcb like intel
09:34 PM Tom_L: i5 etc
11:22 PM rue_mohr: oo cooler now :)