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At the strange little ice cream shop down the street.

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At the strange little ice cream shop down the street.

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    cybersecurity@poliverso.orgundefined
    Inside a Compact Intel 3000 W Water-Cooled Power SupplyRecently [ElecrArc240] got his paws on an Intel-branded 3 kW power supply that apparently had been designed as a reference PSU for servers. At 3 kW in such a compact package air cooling would be rather challenging, so it has a big water block sandwiched between the two beefy PCBs. In the full teardown and analysis video of the PSU we can see the many design decisions made to optimize efficiency and minimize losses to hit its 80 Plus Platinum rating.For the power input you’d obviously need to provide it with 240 VAC at sufficient amps, which get converted into 12 VDC at a maximum of 250 A. This also highlights why 48 VDC is becoming more common in server applications, as the same amount of power would take only 62.5 A at that higher voltage.The reverse-engineered schematic shows it using an interleaved totem-pole PFC design with 600 V-rated TI LMG3422 600V GaN FETs in the power stages. After the PFC section we find a phase-shifted full bridge rectifier with OnSemi’s SiC UF3C065030K4S Power N-Channel JFETs.There were a few oddities in the design, such as the Kelvin source of the SiC JFET being tied into the source, which renders that feature useless. Sadly the performance of the PSU was not characterized before it was torn apart which might have provided some clues here.Schematic diagram of the AC-DC circuit in the 3 kW, 12VDC power supply. (Credit: ElectrArc240, YouTube)youtube.com/embed/da9GwXX-0Zs?…hackaday.com/2026/02/22/inside…
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    otttoz@mastodon.unoundefined
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  • nuintari@mastodon.bsd.cafeundefined

    Story time.

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    nuintari@mastodon.bsd.cafeundefined
    Story time.You may or may not know this, because I have not made much effort to be in the public view of my past chosen social circles since about 2016, but I am trans.....something. I go both ways, guy, gurl, down the middle most days. I don't really care for labels, but whatever it is I am doesn't really matter. The point of this story is my sister. My sister was one of the first people who truly accepted me for who I am, with no baggage. That'll matter later.One night, very early after I had come out, we were hanging out at a local pub. Chilling with friends, singing karaoke, and generally being merry.I would like to point out that I have a deep voice, no ability to disguise that aspect of myself, and my preferred footwear is platform stilettos that make me stand over 6'8 tall. Sandy blonde hair down to my ass with a bleach blonde stripe framing my face. In other words, I'm a towering amazon wearing sunglasses at night in skintight jeans...... often singing Billy Idol karaoke. Just to paint a picture, you'd have to be exceedingly drunk to mistake me for a genetic woman.Side note, I once heard someone explain to someone else at a hacker convention when asked, "nuintari? who is that?"They replied, "heels.""Ohhhhhh!"Those black and red thigh highs.... I still have them. Anyways, back to it.This drunk man comes up to me, and starts laying it on _thick_. Saying some really crude stuff I am sure he thought was pure poetry. It was basically the verbal equivalent of an unsolicited dick pic. "Oh baby, you come home with me, I kiss you where you like it." Yes, he was exceedingly drunk.I tried repeatedly to brush him off, but as I got more aggressive about my denials he just got closer. At one point I even stated coldly, "Dude, you don't understand, I have a PENIS, you don't want this." He simply replied, "Awww baby, it ain't no thang," and then he started getting handsy.Cue my sister, who at this point, I need to make sure you are all aware of her stature. My sister is a former gymnast. She is 4'11, 90 lbs soaking wet, holding a cinder block. She is not a big person by any measure. This fella was significantly shorter than me, but that was true for anything in the bar including most of the neon signs. He was taller than her, and most definitely heavier.But that doesn't stop her. No sir, she squeezes right between me and this overbearing sweatbag, pushes him back a step, looks him right in the eyes and states very firmly, "Back off, she's mine."And.... it fucking worked. He backed down. He walked away, defeated. I could hear him ranting to his friends later on, "Oh, that bitch was such a tease, but she a fucking dyke! I was gonna get me some of that"The best part was, his friends were laughing at him, and one even apologized for his behavior and bought my sister and I a beer.My sister forgot my birthday this year. It was three weeks ago and she has yet to say so much as say happy birthday via text. But another post I saw here on the Fedi inspired me to tell this story. Telling it made me realize, for all she has ever done for me, for how much she has always been there for me, I can forgive her forgetting a stupid date. I'm gonna wish her a happy birthday after all. It's today.
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    alberto@nonoino.masto.hostundefined
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