#garfield Logs

May 10 2020

01:14 AM rue_shop1: hmmm the nibs on those stubbies dont look like their bleeding right
01:20 AM rue_shop1: for copper
01:20 AM rue_shop1: I'll try an overplot, but that never works
01:28 AM rue_shop1: damn, its not looking good
05:47 AM polprog: rue_mohr: stronger suspression load = more resistance?
05:47 AM polprog: the fet is a P55NF06
11:40 AM rue_mohr: lower resistance
11:40 AM rue_mohr: absorb more of the energy
11:40 AM rue_mohr: but your inductor is saturating really fast
11:40 AM rue_mohr: you need to do a pulse time that is shorter than the time to saturate
11:40 AM rue_mohr: you should see a linear current ramp
11:41 AM rue_mohr: /
11:45 AM Tom_L: is it hard to set up spi on the rpi?
11:46 AM Tom_L: i wonder how you would do that from an os
11:48 AM polprog: weird.. maybe my PWM is too slow
11:48 AM polprog: too small pulse resolution
11:48 AM polprog: gotta finish this crap
12:10 PM rue_mohr: polprog, what do you have the freq at?
12:11 PM rue_mohr: Tom_L, not sure on that, you can write software in various things, I dont know what the library support is like
12:11 PM polprog: rue_mohr: ~230Hz
12:12 PM Tom_L: google makes it look easy
12:13 PM Tom_L: To enable it, use raspi-config, or ensure the line dtparam=spi=on isn't commented out in /boot/config. txt , and reboot. If the SPI driver was loaded, you should see the device /dev/spidev0. 0 .
12:14 PM Tom_L: but that doesn't say what the CPOL etc are set to
12:15 PM rue_mohr: hmm, well, maybe go to 1kHz
12:15 PM rue_mohr: you dont want it to repeat too fast, you need things to reset in the off-time
12:15 PM Tom_L: https://www.raspberrypi.org/documentation/hardware/raspberrypi/spi/README.md
12:15 PM rue_mohr: Tom_L, it'd be some research
12:16 PM rue_mohr: I have to get up for work
12:16 PM Tom_L: doesn't seem too bad but i have 0 experience on the pi
12:16 PM rue_mohr: I was just writing python stuff
12:16 PM polprog: rue_mohr: ill try 1khz
12:17 PM Tom_L: https://www.raspberrypi.org/documentation/configuration/raspi-config.md
12:17 PM Tom_L: maybe it's all menu driven, dunno
12:24 PM rue_mohr: I remember a menu...
12:33 PM Tom_L: ok pi on the way
12:35 PM rue_mohr: better than tv
01:16 PM Tom_L: somewhat
02:25 PM rue_mohr: no commercials
02:25 PM rue_mohr: just bathroom breaks
04:17 PM rue_mohr: https://www.ietlabs.com/rsbox.html
04:17 PM rue_mohr: I forgot tI have a bunch of those switches
04:42 PM polprog: oh, wow, forgot to uncheck BW conversion and the ULN2003 pics are b&w
04:42 PM polprog: color is arbitrary anyway
04:48 PM polprog: Dodge chellenger, gree, 39000km, $10k
04:49 PM Tom_L: be a catch if it were a 70's model
04:49 PM Tom_L: late 60's
04:50 PM polprog: date manufactired 2018? cant be right
04:50 PM polprog: https://apollo-ireland.akamaized.net/v1/files/eyJmbiI6IjV3NDNsbTR1eG90azEtT1RPTU9UT1BMIiwidyI6W3siZm4iOiJ3ZzRnbnFwNnkxZi1PVE9NT1RPUEwiLCJzIjoiMTYiLCJwIjoiMTAsLTEwIiwiYSI6IjAifV19.bnN7H3f58FePBI8f_p10tZhKpnTxiqzVH2Kph7PRm8w/image;s=1080x720
04:50 PM Tom_L: could be
04:52 PM Tom_L: one of the late model 'copy' cars
06:23 PM rue_mohr: hahah twitter locked my account again
06:23 PM Tom_L: you bein a bad bad boy again?
06:23 PM polprog: DMCA?
06:23 PM rue_mohr: yea, but what tweet??? like seriously?!
06:24 PM Tom_L: they're watching you now
06:25 PM rue_mohr: I didn't post anything with music!
06:25 PM rue_mohr: latley
06:25 PM rue_mohr: there were all sorts of posts with snippets of background musci
06:26 PM Tom_L: you pooped in their cereal now they're mad at you
06:27 PM polprog: i didnt get dmcad for the FSOL snippet
06:27 PM polprog: which was edited in, not recorded by the way
06:28 PM polprog: nite
06:31 PM Tom_L: rue_mohr, i hope you're a pi expert
06:31 PM rue_mohr: not even close
06:31 PM rue_mohr: its just a linux computer tho
06:32 PM Tom_L: good
06:32 PM Tom_L: i just gotta figure out the spi config on both ends of it
06:32 PM Tom_L: i gotta re'flash the mesa board too since it's parallel port interface right now
06:33 PM Tom_L: and once i do i gotta get the pi spi working to revert it back to parallel
06:34 PM Tom_L: well i think jtag would be a last resort
06:38 PM polprog: openocd supports jtag on pi (needs to be recompiled to be enabled) and flashrom supports Pi's SPI
06:38 PM polprog: goodnight for good now, gotta get up tomorrow earlier than usual
06:39 PM Tom_L: good good night
06:39 PM Tom_L: hey polprog
06:39 PM Tom_L: ... just checkin
06:48 PM rue_mohr: ok, etching keyboard pcb now
06:48 PM rue_mohr: Tom_L, might need that clad you have
06:48 PM rue_mohr: if I keep going at this rate :)
06:52 PM Tom_L: you're welcome to it all
06:52 PM Tom_L: i have no plans to use it at this point
06:52 PM Tom_L: it would cost a mint to ship what i have though
07:11 PM rue_shop1: there seems to be a bump in the costs
07:12 PM rue_shop1: sometimes a pallette isn't that expensive to move around
07:46 PM Tom_L: link to your little jtag board you used with openocd?
07:51 PM rue_shop1: I didn't tho I used a different tool
07:51 PM rue_shop1: that could only do that one fpga
07:52 PM rue_shop1: its a... usb 232... someting
08:04 PM rue_shop1: https://www.aliexpress.com/item/33047435425.html
08:04 PM rue_shop1: Tom_L, ^
08:05 PM Tom_L: does that work with your fpga board?
08:05 PM Tom_L: the spartan6 chip
08:09 PM rue_shop1: yes, but only with a program that cabn only program that chip
08:10 PM Tom_L: yeah, was that the openocd one or soemthing else?
08:18 PM rue_mohr: no its a one trick pony, open source
08:19 PM rue_mohr: I think polprog got it working with openocd>?
08:19 PM Tom_L: i thought so too
11:05 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1160075.jpg
11:05 PM rue_mohr: my guru came by with some aluminum for me
11:06 PM Tom_L: damn sure did
11:07 PM rue_mohr: oh damn I was supposed to refuel my truck today
11:07 PM rue_mohr: }:| distractions!
11:07 PM Tom_L: uh oh
11:07 PM rue_mohr: price is gonna go back up and I'm gonna cry
11:07 PM Tom_L: did you hug your mom today?
11:07 PM Tom_L: it went up here already
11:08 PM rue_mohr: whe was by yesterday,