Denys

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Denys

Denys

@karaporkin

Embedded software and mechatronic enthusiast. #clang #embedded #dsp #robotics

Earth Katılım Eylül 2017
2.7K Takip Edilen96 Takipçiler
the tiny corp
the tiny corp@__tinygrad__·
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.
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Denys@karaporkin·
@photoncmndr Once they are positive, you are good in 99.9% cases. For high-reliability applications, you still always need to physically test under different temperatures/voltage over a batch.
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Photon Commander
Photon Commander@photoncmndr·
Are these good numbers for some risc-v cores running on an Artix A7 200T at 50mhz? Yes is the answer
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Denys
Denys@karaporkin·
@blind_via I did the same. Most likely, it is debug connector. Once you build something that you certified for EMC or similar, you do not want or can’t to change any metal layers. So any unused features are simply covered with mask.
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BlindVia
BlindVia@blind_via·
I found another one. These shorted zero ohm series resistors are for differential. And you can see they have neighboring pads for making pull downs (or ups) if so desired as well. This PCB technique is kick ass bro.
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BlindVia@blind_via

Check out these zero ohm series resistors footprints. These are just a place holder in the PCB for where you could potentially add a series resistor but you want to start with zero. If you wanted to add one, you would just cut the copper in half and scrap the solder mask off, wa la resistor landsite in series with the path.

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Denys
Denys@karaporkin·
@paulg Progress not always linear or exponential. Most likely, we will reach a plateau soon, and only the next breakthrough will lead to such progress.
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Denys
Denys@karaporkin·
@PalmerLuckey Designs failing during testing is actually fun. Anyone who’s designed anything meaningful has experienced it. If you haven’t, you probably haven’t designed much.
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Palmer Luckey
Palmer Luckey@PalmerLuckey·
Be careful with your fireworks this weekend!
Matt Grimm@mttgrmm

Most founder and VC types love to publicly celebrate the wins, the product launches, the major milestones... And fair enough! Building new hard tech is indeed incredibly rewarding when things work. Anduril does plenty of celebrating! But what doesn't get talked about nearly enough is how often things *don't* work. Every company building rockets, aircraft, engines, missiles, drones, or any other difficult tech has LOTS of days where something doesn’t work, when a test goes badly, when you thought you got it juuuuust right but womp, not so much. Those days suck, but they are also inevitable on the path to success. Well, Friday was one of those days for Anduril. A solid rocket motor exploded during a test fire at our factory in Mississippi. Most importantly, no one was hurt. The safety systems worked exactly as designed. The team responded exactly the way they've trained to, and damages to our test stand were minimal. By the end of the day everyone was already focused on understanding what went wrong and getting ready for the next test. There's a reason for the cliché "not rocket science" -- because rocket science is actually quite difficult! Friday's test failure is just one example of why. Development testing exists to answer difficult questions before the design goes into production. Obviously we aim and hope for successful tests, but just as obvious, every test failure gives us data. Every anomaly improves the next design. Every test, in the long run, makes the program stronger. Even if Friday sucked (and it did), we take a deep breath and move onto the next one. We'll be back to test firing rockets within weeks. Anduril is continuing to build and test rocket motors weekly, and the production facility remains on schedule. Disciplined iteration begets steady progress, and we're already putting the pieces of our test stand back together for the next test. Onwards.

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Denys
Denys@karaporkin·
@boxcardavid Turns yes, but you can increase crossection or number of strands to improve filling factor - efficiency.
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Denys
Denys@karaporkin·
@tomfleet The outer holes help prevent delamination from screw torque by supporting the outside radius. Grouping them also creates rigid ribs, reducing board fragility and leaving useful paths for inner-layer routing.
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Tom Fleet
Tom Fleet@tomfleet·
I know it's got to be some RF thing, but I am curious as to why they double tap the mounting holes with a series of both single and quad drill hits. That said, if it was RF, I'd (for some reason) expect there to be rotational symmetry with the single and quad aligned...
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Reptalica@Reptalicant

iPhone 18 Pro or (Prm) motherboard leaked A20 Pro chip now adopt WMCM packaging, which move the DRAM to the side of the package, allowing for better thermal dissipation. It also get LP6 96-bit memory Die size is roughly the same as A19 Pro, and the NPU seems to be beefed up

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Denys
Denys@karaporkin·
@Aaronia_AG Looks fascinating! What the system clock source PLL do you use to clock all these components with low phase noise?
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Denys@karaporkin·
@CooperZurad I feel the magic smell over the photo.
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Denys
Denys@karaporkin·
@0xSero He has nothing to do with freedom.
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0xSero
0xSero@0xSero·
Pavel my goat.
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Denys
Denys@karaporkin·
@__tinygrad__ There will be a severe temperature gradient between the boards if you plan to push air through all of them.
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the tiny corp
the tiny corp@__tinygrad__·
1 of 8 NVIDIA RTX PRO 6000 Blackwell being torn down for tinybox pro install. Don't worry, it's only $10,000 if you shear one of the ribbon cables.
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T.Pieper
T.Pieper@Tri_Stanisaurus·
Expanding the team to include an embedded electronics specialist. Ideally with experience in ardupilot and Fadec controls.
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Denys@karaporkin·
@bubbleboi If you can pack this like HBM - yes, otherwise- no
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Denys@karaporkin·
@luigifcruz They are most likely not Max-Q so much more heat.
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Denys
Denys@karaporkin·
@chesterzelaya Because nobody wants to give to the opposite side any additional knowledge. Once everything will settle, you’ll be surprised.
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Chester
Chester@chesterzelaya·
so interesting how the top drone AI lab in China hasn’t published any papers since 2022 🤔🤔🤔
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Denys
Denys@karaporkin·
@Aaronia_AG What RF connectors do you use here? If they are SMA/3.5mm/2.92mm, they are unnaturally small relative to QFNs and USB-C size.
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Aaronia AG
Aaronia AG@Aaronia_AG·
Big Last Minute Changes in the 30MHz-26GHz Filterbank 🥳 We now replaced ALL adjustable filters ICs with our custom silicon, since the first run works perfect & mass production can start in June. Only the switches remain non Aaronia😉 #aaronia #rf #tech #filter
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Denys@karaporkin·
@Rej6h @Aaronia_AG Three wide-band conical inductors for amplifier bias.
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Eric
Eric@Rej6h·
@Aaronia_AG It's quite interesting. What components are the three brown below
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Aaronia AG
Aaronia AG@Aaronia_AG·
Relocated the USB to the Top Corner to avoide RF Interference: Still a very compact size. Both version (with & without amp stage) should be ready as proto in 4 weeks. All filter stages should offer >45dB rejection & you can even cascade them😎 #aaronia #rf #filter #usb
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Denys
Denys@karaporkin·
@TiagoNugent Until that nice gear teeth will not become very brittle after this.
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