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@Kingu@sakurajima.moe
2026-06-20 22:03:24

Gang Finale
I am not psychologically ready for the end of all fucking WACK groups...

@azonenberg@ioc.exchange
2026-06-21 09:56:13

I did all of my original SI simulations for the SFP28 front side launches using only layer 1 signal and layer 2 ground plane, ignoring everything deeper in the board.
Some of you asked if the ground plane voids needed to extrude all the way into the board. Does it matter?
For the BGA launch, at least, the answer is in: there is a measurable effect in simulation, but it's minimal. Return loss of the launch is better than -20 dB in both configurations so I'm not going to bo…

Return loss plot better than -20 dB from 10 MHz to 35 GHz
Underside current density plot showing almost no current in the layer 4 plane
Top side current density plot showing return paths and voids in the ground plane under the BGA lands
ngscopeclient TDR response showing the two traces' insertion loss and TDR curves are nearly identical
@Techmeme@techhub.social
2026-05-21 06:31:54

A study conducted in the Phoenix metro area finds that waste heat from data centers can raise air temperatures in downwind neighborhoods by as much as 4°F (Tech Xplore)
techxplore.com/news/2026-05-ce

Data centers raise nearby temperatures by up to 4 degrees in Phoenix
Waste heat from data centers can boost air temperatures in downwind neighborhoods by as much as 4 degrees Fahrenheit, researchers at Arizona State University report in a new study conducted in the Phoenix metro area, the hottest in the U.S.

@detondev@social.linux.pizza
2026-06-20 11:35:07

Spent the morning putting Gen Z slang into Kevan Davis's 2003 Infinite Teen Slang Dictionary and trying not to giggle too loud
thesurrealist.co.uk/slang.cgi

bussy interj. casual greeting. "Bussy, man." "Bussy."
mog v. to eat someone or something. "Why do you mog, boy?"
aura farm n. a particularly flashy police car. "My friend, you're getting an aura farm!"
glizzy n. a vulgar hand gesture. "Are you giving me the glizzy, man?"
@grahamperrin@bsd.cafe
2026-05-20 00:51:14

@… maybe out of scope for you, the new site does not yet lend itself to things such as previewing.
No FreeBSD logo seen in Mastodon, and so on.

@Cognessence@social.linux.pizza
2026-05-20 14:25:56

Creating parts for Skye Edwards (her very imaginative / different new solo work outside Morcheeba. ☺️)

@schachjugend@schach.social
2026-05-21 17:38:37

#dem26-Teams im Überblick 3/4

@Techmeme@techhub.social
2026-07-20 23:21:04

Samsung debuts Samsung Galaxy Card, its first-ever US credit card, a Visa from Barclays; it offers 5% rewards for purchases directly from Samsung (John Velasco/Tom's Guide)
tomsguide.com/phones/samsung-p

Samsung Galaxy Card takes aim at Apple Card with way more perks and rewards — here’s what you get
You get 5% rewards when you buy stuff directly from Samsung

@schachjugend@schach.social
2026-05-21 17:37:43

#dem26-Teams im Überblick 2/4

@azonenberg@ioc.exchange
2026-06-20 11:28:49

Just finished an end to end simulation, BGA land to ARF6 launch, of the actual SFP28 TX lane 0 pair (not the shorter pair I had been using for initial layout work).
Took a while - the final geometry would have been way too big to simulate in a sane amount of time. Sonnet estimated 113GB of RAM and 122K mesh cells which... yeah.
I *could* do it, I have half a terabyte of RAM on this workstation, but considering that a 22GB / 54K cell simulation takes ~20 minutes per frequency and …

ngscopeclient showing an insertion loss curve out to -5.5 dB, TDR between 100 and 110 ohms, and a nice open eye pattern
Sonnet window showing the simulated layout
S11 plot showing return loss better than -15 dB out to 35 GHz, and better than -20 except for a few larger ripples