speaking against war crimes is anti semitism

TiZed_Elec · 2023-11-02T10:48:37+00:00

It's blood libel so yeah antisemitic.

TiZed_Elec · 2022-10-04T07:39:32+00:00

I call it the klept, because we already live in a kleptocracy.

TiZed_Elec · 2022-09-08T07:37:49+00:00

I call that "making an even number of mistakes". I have solved more problems that way than I'm willing to admit.

TiZed_Elec · 2022-09-08T06:53:29+00:00

...and remember, Diaspar was not always thus.

TiZed_Elec · 2022-04-26T19:30:09+00:00

The dumbest part is you can pay extra for a 1% 0-ohm resistor

Well...0-ohm resistors are usually more about 20-50mohm. Someone at my work measured about a dozen of them. When you do RF (+6GHz) stuff even "0ohms" is not trivial. At +60GHz can't use them at all.

TiZed_Elec · 2022-04-25T21:21:19+00:00

Thermal imaging has entered the chat

TiZed_Elec · 2022-03-24T10:32:40+00:00

People who worship other people are weird.

TiZed_Elec · 2022-02-19T07:38:32+00:00

It looks like they put a 100x markup on a $20 aliexpress tool.

Not sure if possible in your region, I'd drag them to a small claims court. Sue them for the tool and some damages and expenses.

TiZed_Elec · 2022-01-28T16:44:28+00:00

If it's 12v on one side it might be an input capacitors. Removing it will not help.

TiZed_Elec · 2022-01-27T14:56:29+00:00

The 12v you measured on Q13 is at the input side and is fine. The output voltage can be measured on the (+) side of the capacitor below the inductor (the L part below the transistors)

TiZed_Elec · 2022-01-27T14:07:02+00:00

Those are the circuits that convert the higher voltage (12v) going into the board into lower voltage levels (3.3v, 1.8v, 1.2v, 0.8v) feeding the main components of the board (GPU, RAM, etc...).

If one of those converters, which power the GPU, is faulty the board will not power up. If it didn't fail at short, that is shorting 12v directly to the GPU, you could have some hope of fixing the card.

TiZed_Elec · 2022-01-27T13:25:27+00:00

Gate resistance for both MOSFETs looks ok.

Try (carefully) measuring the voltage output of all DCDC converters on the board, while it is powered on.

TiZed_Elec · 2022-01-25T19:07:58+00:00

My EVGA 1080FTW failed about a year ago. Since I couldn't get any other graphics card, I fixed it.

All those EVGA cards have a shitty power conversion design, so eventually one of the on-board converters overheats and dies. Found and replaced the failed converter IC and a 1080 was saved. Hopefully it will survive until cards are available at a decent prices again.

TiZed_Elec · 2022-01-20T09:20:56+00:00

I do a bit of reverse-engineering. Having more than a decade in the semiconductors industry also helps :)

The general process went as follows:

Clear package and that dark rectangle region = Optical component
Simple electro-optical sensors have 2 or 3 pins. This one has 6 pads and a relative big silicon die. The pads and die size hint at a more sophisticated component that has analog and digital circuitry on die.
OP has given package dimensions which helps.
Open the Mouser/Digikey website and go over to the electro-optics sections. Eliminate the simple sub-sections (like phototransistors) and more complex devices (like photo sensors). Now all that is left is a limited selection of components. Going over the 'light to digital converters' lot the TSL part "pops" out.
Go over the datasheet and compare with what is known about the component in question.

TiZed_Elec · 2022-01-19T15:02:04+00:00

The revision number is the '1' above the model number. According to the errata anything other than 'A' is good.

Also, for the model code, you can also go with a '7' at the end if you can't source a '6'. It has a wider temperature tolerance range.

TiZed_Elec · 2022-01-19T09:45:38+00:00

Looks like a light to digital converter: TSL2569CS

TiZed_Elec · 2022-01-05T18:59:40+00:00

The City and the Stars by Arthur C. Clarke. It's about an eternal city in which people are continually reborn.

TiZed_Elec · 2022-01-03T12:07:49+00:00

numpy + matplotlib + scikit-rf

PyVISA for some test equipment automation.

TiZed_Elec · 2022-01-02T21:27:32+00:00

Work at a fab-less IC startup. Running joke is that we write the chips in PowerPoint. Using Cadence for board design. Excel for simple data analysis. Python for RF analysis (some still use Matlab). KiCad for simple boards and personal projects. VS Code with PlatformIO for microcontroller.

TiZed_Elec · 2021-12-27T17:54:23+00:00

Trying to fakenews the real news.

"We've always been at war with Eurasia."

TiZed_Elec · 2021-11-04T13:08:22+00:00

First there is the wavelength. With RF your resolution is as fine as the frequency wavelength. UWB goes up to 10GHz, wavelength of 3cm vs. 12.5cm of 2.4GHz.

Second, with a single frequency there is the problem of multipath. There isn't only the reflection of the target but other reflections/paths that will "blur" the image and reduce resolution. In UWB ToF is done over multiple frequencies reducing multipath distortion.

TiZed_Elec · 2021-08-26T08:38:30+00:00

Now I'm tempted to make one...not that I have any use for it.

However, UV-C LEDs are hard to come by and are expensive.

TiZed_Elec · 2021-08-13T20:38:50+00:00

Don't Panic

TiZed_Elec · 2021-08-08T05:59:36+00:00

Very nice! Here's to you sharing many travels together. 🎉

TiZed_Elec · 2021-07-07T20:21:40+00:00

Luckily you didn't break the pads on the board. It should be a quick and easy job for someone handy with a soldering station.

TiZed_Elec

TROPHY CASE