Ken Masterson

@__tinygrad__ Each OAM consumes 700W, plus 100W worth of fan power to cool it. Power in most offices is 120V, which is functionally limited to 1800W. So, even a system with a single OAM can pop breakers. We build PCIe expansion boxes with 240V 54V M-CRPS supplies. Still hot and loud.

@KenMasterson The DC-DC converter isn't hard, that's off the shelf and simple.

This is an MI300X. Has anyone seen a way to plug it into a PCIe slot? Would be great for development to have this in a normal computer that reboots quickly.

@GrigoryEvko @__tinygrad__ The issue is usually insertion loss on the PCB itself. Hence, expensive backplane materials, or flyover twinax.

@__tinygrad__ Have you noticed / measured any signal integrity issues with connectors like this one?

@nzevh_ @blind_via I use "P3V3", or sometimes "​[Prefix][Voltage]_[Power State]_[Topology]_[Target]" when I need to keep the power tree traceable. P12V_SB_SW0_SSD

@blind_via is it weird to use 3V3_P??

Are you a +3.3V guy or a +3V3 guy? Having both naming conventions be popular will sometimes cause the mistake of using both and split the net into two on the PCB design.

@Landswellsong @i2cjak I was asking about the text in the assembly (fab) layer. The default silkscreen text is a bit large, but less confusing to me than the assembly including the component value in large font.

@KenMasterson @i2cjak I'd say the default silkscreen font is way too large too, but then again many hobbyist / small batch PCB shops have a limit on how tiny the font can be.

step 1: Delete all reference designators step 2: Disable all fab layers step 3: Decoupling capacitors for 2-3 years

@user00xman69696 @BackwoodsEnginr @i2cjak Return current follows the electrically shortest path. Current density will essentially shadow the transmission line (it's not a gas). By creating islands, the bridges between the reference and GND become bottlenecks.

@BackwoodsEnginr @i2cjak i thought it was a good practice to split the ground planes could you explain to me why that’s not a good idea?

breaking down this fucked up reddit PCB (a thread)

@Lasurak @Pirat_Nation Samsung sold the drive with the terms being a refund of market value at warranty filing, or equivalent/larger drive. The terms were presented before the sale. The runaround is why Rossmann is drawing attention to the situation. download.semiconductor.samsung.com/resources/warr…

@Pirat_Nation So they offered his money back, which is normal. Replacement or the value that you paid. He's going to lose this one.

Louis Rossmann is planning to sue Samsung because of a warranty problem with a 4TB SSD drive that he bought from Best Buy for around 330 dollars about two years ago and that stopped working while still under warranty. He sent Samsung proof of the failure and they asked for the drive to test it but after checking they returned it saying it was fine even though Rossmann tested it again and confirmed it was still broken. Samsung then offered him only the original 330 dollar refund and said they had no stock for a replacement yet the exact same drive is currently selling on Amazon for about 949 dollars.

@hthieblot Sachs Report: Just a guy posting things he found interesting. web.archive.org/web/2008040819…

Anyone who surfed the early web between 1995-2010. What’s the one website/app you still think about?

@evclinic @sabanohs I think the criticism being referenced is "13 Tesla revisions. Same flawed design since 2012."

@sabanohs Not Tesla, fake unsustainable coolant delete repairs done by 3rd party

We've been censored for 2 years for saying this — but Tesla owners deserve the truth. "Coolant delete" is destroying motors in our workshops every single week: 🔥 Stators burning WITHOUT a drop of coolant 🔥 Gearbox oil seals cracking, gearboxes running dry 🔥 Stator cooked from the inside where is NTC blindspot 🔥 Inverters thermally stressed 🔥 Rotor shafts micro-cracking 🔥 Failures at 20,000 km — not 200,000 These are not theories. These are units on our benches. Right now. Workshop-validated. Documented. Repeated weekly. Meanwhile we get banned, deleted, silenced in every major Tesla Facebook group for posting it. 13 Tesla revisions. Same flawed design since 2012. 800,000 km on our HolyGrail kit. 2-year unlimited-mileage warranty. Read what they don't want you to see 👇 evclinic.eu/2026/05/01/tes…

@Abhinavsns @amypretzel Fornjot is pretty impressive work, and a labor of love for the main dev (and contributors) since 2021, and is now his job. Hanno Braun keeps a monthly blog about his efforts, and it's kind of the opposite of a vibe coded kernel. Cool if code tools accelerate development, though.

@amypretzel fornjot.app

anyone vibe coded a cad kernel successfully yet? lol

@amer_icon Now, tell me what you think of MBD and ASME Y14.41. en.wikipedia.org/wiki/ASME_Y14.…

Tomorrow's nightmare. It's a nightmare because I just realized I don't have a solid model, only the waterjet cut blank drawing. Here's a sample of the drawing I was working off of. I can infer intent, but this one is pushing the limits. And would it kill you to give me a spare?

@chetan_crasta @davepl1968 As speed and efficiency increases, margins shrink. Digital electronics ARE analog electronics, and the ability to engineer hydraulic controls and servo systems will not go away, simply because more of the design work is abstracted away by digital tools.

@davepl1968 Hope we never lose this kind of cool engineering due to digital electronics.

This a computer, and you likely own one. It's a hydraulic analog computer. It’s essentially a machined analog computer that computes with fluid instead of electronics: pump pressure is routed through passages that act like wires, while spool valves, springs, orifices, and check balls perform the equivalents of comparators, logic gates, delays, and one-way elements. What it “calculates” is the machine’s current operating state, whether conditions have crossed a threshold to justify changing state, how strongly to apply each output, and how quickly to make that transition without instability or shock. It does this by continuously balancing forces—pressure on different valve areas against spring preload and feedback pressure—so each valve shifts only when one hydraulic condition outweighs another, while restrictions and chambers add timing and smoothing. In plain English, it is a real-time fluidic state machine that solves “if this pressure is greater than that one, route flow here; otherwise hold, delay, soften, or override” entirely through geometry and oil. They're used in every car with an automatic transmission, where it makes choices like what gear to be in and how hard to apply clutches, etc.... And some dude worked it all out on paper back in the 1960s.

@StephenFre75378 @niccruzpatane Just over 30 minutes for the large-battery config (at full load). Diesel will be faster for long haul >1,000 mile range; the Tesla Semi will realistically only do 800 miles per day.

@niccruzpatane How long does it take to recharge after 350 miles with full load? Time is important for long hauls.

Instead of a two-speed transmission, The Tesla Semi has two rear axles. The forward axle, with two motors, is geared for acceleration, while the rear axle is geared for highway efficiency. The Semi has a tri-motor setup with 800kW of power. At highway speeds, the front axle will completely disengage.

@eevesters @aakashgupta Only 15% of Costco member households have EVs, and most of those households also own a gasoline powered vehicle. With the average household keeping vehicles for 8 years, fuel stations still make sense for the next decade.

Costco makes penny-level margins on every gallon of gas it sells. The fuel operation runs close to break-even on ~$27 billion in annual revenue. And they just announced they're building standalone gas stations with no store attached. Sounds insane until you see where the money actually sits.

@jlcjak Both are CoreXY printers running Klipper on RPi clones, and don't paywall anything.

@jlcjak $239 Infimech TX of you just want to dip your toe in, and only need 220x220x250mm build volume. $1K Sovol SVO8 Max if you want 500x500x500 build volume and the ability to add a Bondtech INDX tool changer in the future.

ok a printer is a business expense now. which one boys? tbh the only reason I'm considering bambu is the more readily available replacement parts qidi is more capable and I won't have to fight with it to mess with its software

@joeltelling @Sovol3d We have a @Sovol3d SV08 Max with enclosure, at work. After some rough edges (finicky height sensor), it's pretty good. The 2 last major annoyances are that it frequently requires manual un-pausing for phantom clogs, and changing filament seems to cause a layer skip. Any tips?

The @Sovol3d SV08 Max is a BEAST. youtu.be/VBWC5udIlkg

@yacineMTB Those SOT-23 packages are hand-soldered. This is intentional; the pin numbering was probably wrong in either the symbol or the footprint.

Why does this happen

@abdimoalim_ Others have mentioned this, but RISC-V might be the open ISA alternative for GPUs. Ubitium recently made their first batch of RISC-V chips they claim can operate as CPU/DSP/GPU/FPGA. eetimes.com/ubitium-tapes-…

Is there a GPU equivalent to what RISC-V represents for CPU ISAs? I mean an open/standardized GPU ISA that hardware vendors could implement independently.