<whitequark>
we dont even have this kind of knowledge as a species
<whitequark>
also the trans community has a ton of outdated knowledge perpetuated by ancient awful practices (cough US cough) and generally superstitions and hearsay
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<rqou>
whitequark: why does this _always_ seem to end in "the US is teh dumb"?
<zkms>
many such cases
<TD-Linux>
because internet arguments are always more fun if you throw nationalism into the mix
<rqou>
i mean, the US health system is pretty widely criticized even without nationalism
<sorear>
this is one of few places where continental europe is difficult to call better, the gatekeepers have way more power and you don't even have things like at-will name changes
<sorear>
(UK does name changes better than US though)
<TD-Linux>
see told you
<TD-Linux>
(sorry about that. spent the last hour on HN)
<shapr>
did you seen Bunnie's post about how much he likes the migen community? "On the firmware front, I continue to be impressed with the competence and engagement of the Litex/Migen community"
<mithro>
shapr: I'm really looking forward to the netv2 boards
<shapr>
me too!
<shapr>
I ordered the 100T board
<shapr>
I also wanted to post a comment and ask how I could get high quality HDMI cables ...
<shapr>
If bunnie sold those with markup, I'd still buy cause I trust his skills
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<awygle>
huh, having just gone through that process i wonder why bunnie picked the tps54327
<shapr>
did you come to a different conclusion?
<awygle>
yes, but i had a different set of constraints
<awygle>
in particular i wanted to support a 3.3V input and i am not finding a D-CAP2 regulator that takes below 4.5V
<shapr>
I need to scrape off my novena and reinstall...
* shapr
sighs
<shapr>
too many projects
<awygle>
oh no i did find a couple but they cost ~3x more than another option
<mithro>
awygle: I'm guessing that bunnie has different set of suppliers too
<awygle>
mithro: probably, yes
<awygle>
although i would be surprised to learn that that was a big consideration for new-ish TI parts like this
<awygle>
(not in an "i don't believe it" way, just, that would surprise me)
<awygle>
i associate that more with older parts like the inexplicably-ubiquitous LM2596
<azonenberg_work>
awygle: what about the 78xx :P
<azonenberg_work>
or the 741?
<azonenberg_work>
(is there any reason at all to use them these days?)
<awygle>
one thing i did do when picking a regulator was to go through Octopart's Common Parts Library and Seeed's Open Parts Library to see what they had
<awygle>
(tl;dr nothing suitable)
<azonenberg_work>
honestly these days if i need a SMPS i check if 5V input is OK
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<azonenberg_work>
And if 8A total across all rails is OK
<awygle>
but i'm sure that's a terrible substitute for living in shenzhen and actually knowing things like bunnie does
<azonenberg_work>
and if so, i drop in a LTC3374 without thinking further :p
<whitequark>
lol a linear chip
<azonenberg_work>
whitequark: you have a problem with them?
<azonenberg_work>
it's my favorite SMPS to date
<awygle>
how many rails is LTC3375?
<awygle>
*74
<whitequark>
azonenberg_work: entire catalogues of perfect parts and every single one is too expensive to use
<azonenberg_work>
awygle: Eight outputs on four phases
<awygle>
linear is great but yeah, $$$
<azonenberg_work>
You can parallel up to four of them
<azonenberg_work>
5V input, up to 1A output per channel
<whitequark>
they have an ideal bridge rectifier with zero passives required
<whitequark>
and it costs like twenty bucks
<azonenberg_work>
whitequark: o_O this is like a $11 buck converter
<whitequark>
azonenberg_work: I'm used to like $3 buck converters :p
<awygle>
hm okay. if i needed 8 outputs, i might reach for this chip. meanwhile the one i picked is 5.7x cheaper although only one rail
<azonenberg_work>
awygle: But for a small to moderate size FPGA board
<azonenberg_work>
this can be your entire PSU
<azonenberg_work>
you can do vccint, vccaux, multiple vccio
<awygle>
so if i need 5 or fewer, i'm better off
<azonenberg_work>
it probably will save pcb area too having it all in one chip
<awygle>
that is probably true
<azonenberg_work>
More to the point, it saves engineering time
<awygle>
sure, because you've already done it. but it won't for me.
<azonenberg_work>
Yeah exactly
<awygle>
you really want to save engineering time you use a uh...
<azonenberg_work>
the smps modules? yeah i have used them in the past
<azonenberg_work>
In general as a hobbyist making 1-2 units of a design in my limited spare time, the O(n) component cost isnt a huge deal to me unless the part is like $50+
<awygle>
TPS82140
<azonenberg_work>
But taking an extra day to get the design figured out is a day i could be doing other things
<awygle>
or TPS82130 actually
<awygle>
i freakin love those things. too bad they're unobtanium atm
<awygle>
mouser has 0 in stock, 220,000 on order, and they're arrive in February >_<
<azonenberg_work>
lol
<azonenberg_work>
wow
<awygle>
i'm also pretty sure they're the cheapest option for 3A buck converter too, given no passives at all
<awygle>
lmao "manufacturer lead time 35 weeks"
<awygle>
that's not a good sign
<gruetzkopf>
ah, TI part :D
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* cpresser
likes to sue those things as well
<awygle>
lol "small oversights that we got away with on the Micron parts turn out to be a big deal for the Samsung parts" welcome to my entire job
<awygle>
i guess this is an explicitly political project but damn bunnie is not pulling punches in this post
<awygle>
i'm a little surprised they couldn't get the flex design to work. that sounds like the kind of thing i'd have fun trying to do
<TD-Linux>
an internal detail of why parts <4.5v are less common might be needing a charge pump for the gate driver
<TD-Linux>
but maybe even 4.5v parts have that
<awygle>
i can see how you might need a 2-stage pump for <4.5V parts
<awygle>
(without trying to actually design either)
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<sorear>
Does it bother anyone else that “Linear” is a brand of switching regulator
<TD-Linux>
given how much of smps analysis is spent on the part of the time the fet is in linear mode... not really :)
<whitequark>
lol
<rqou>
soooo, hilarious suggestion i just heard in a recorded conference talk
<rqou>
azonenberg_work you'll like this one
<rqou>
how to travel on a plane (domestic US at least) and be able to use actually good locks on your luggage?
<rqou>
just stick a AR lower receiver in each one and declare that you're traveling with a firearm
<whitequark>
lol
<whitequark>
this is like that one time $REDACTED needed ID and it was easiest to get... a concealed carry license
<whitequark>
of all the things it had the least amount of requirements
<rqou>
not in California?
<whitequark>
don't recall where
<whitequark>
not california
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<sorear>
WA
<whitequark>
right
<prpplague>
technically you are suppose to use TSA approved locks for which they have master keys for
<rqou>
apparently not if you have a firearm lol
<prpplague>
rqou: they have approved ones for firearms
<awygle>
linear makes (made) linear regulators too
<feuerrot>
prpplague: s/they have/everyone has/
<qu1j0t3>
great, they've thought of everything
<TD-Linux>
they keys are easily printable and work well
<qu1j0t3>
somehow guns are still getting on planes, loaded or not *shrug*
<qu1j0t3>
but let's keep buying theatre tickets
<prpplague>
feuerrot: well tsa has a specific list, if they decide to inspect and it's not an approved one that thye ahve keys for, they will cut it off
<prpplague>
i've had that happen before
<rqou>
nah, this guy was specifically using a trick to activate the "don't fuck with my luggage" procedure
<rqou>
he didn't have a full "gun" in any practical sensr
<rqou>
*sense
<rqou>
literally just a lower receiver :P
<prpplague>
yea, but that is still the same
<prpplague>
i have had them inspect my weapon multiple times
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<prpplague>
although i haven't travelled with one in years
<prpplague>
too dangerous to travel outside of your home state with CHL
<prpplague>
since there isn't really universal reciprocity