Activity for Nick Alexeev
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Comment | Post #286030 |
The mention of "O-ring" a technical writer error [the TW wasn't technical enough], or an auto-correction artifact. It should have been "OR-ing", or "ORing". An [O-ring](https://en.wikipedia.org/wiki/O-ring) is a type of seal. (more) |
— | about 3 years ago |
| Comment | Post #286035 |
Maybe I'm missing something about your device. Is your product a PCBA by itself? Or, does it come in an enclosure? U.FL on the board, and some bigger connector (SMA, or BNC, or some other kind) on the enclosure. Is the enclosure metal or plastic? Is it grounded to chassis? (more) |
— | about 3 years ago |
| Edit | Post #286035 | Initial revision | — | about 3 years ago |
| Answer | — |
A: How to protect RF switches from ESD? > In this case the antenna connector is the standard horrible little U.FL, which is connected with coaxial to a bigger one grounded to chassis. The main ESD risk is when someone is connecting or removing the coax. It's quite easy to touch the center pin with ones fingers on a U.FL. from [this commen... (more) |
— | about 3 years ago |
| Comment | Post #286007 |
Post a sketch of the PCB floor plan which you have in mind. In case you have already (prematurely?) done the layout, post pictures(s) of your layout. (more) |
— | about 3 years ago |
| Comment | Post #285721 |
Are you going for the formal IEC 61000−4−2 certification test? Sometimes passing a test it a harder design problem than protection from the ESD in the field. That was my experience this December. (more) |
— | about 3 years ago |
| Comment | Post #285648 |
I've read about industry initiatives (on the level of IPC) to create standardized file formats. I don't know how much of it actually got defined and adopted. Trawl through [Printed Circuit Design & Fab magazine (free-of-charge industry rag)](https://www.pcdandf.com/pcdesign/). Maybe there are over... (more) |
— | about 3 years ago |
| Edit | Post #285155 | Question closed | — | over 3 years ago |
| Edit | Post #280125 |
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— | over 3 years ago |
| Edit | Post #283679 |
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— | over 3 years ago |
| Edit | Post #283679 |
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— | over 3 years ago |
| Edit | Post #283679 |
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— | over 3 years ago |
| Comment | Post #283693 |
This thermal relief has one fat spoke, because the PCB layout author first connected the pin with a fat trace, then pulled the GND copper pour over it. Sometimes I see thermal reliefs with 5 spokes (say at 0, 45, 90, 180, 270). (more) |
— | over 3 years ago |
| Comment | Post #283655 |
Frank, could you please add a link to the text where you saw these terms? Otherwise, if would be too risky for us to guess wrong. (more) |
— | over 3 years ago |
| Comment | Post #283239 |
Another example of a technical translation question on StackExchange: [Looking for translation of “закладная втулка” (threaded bushing?)](https://engineering.stackexchange.com/questions/24030/looking-for-translation-of-%D0%B7%D0%B0%D0%BA%D0%BB%D0%B0%D0%B4%D0%BD%D0%B0%D1%8F-%D0%B2%D1%82%D1%83%D0%BB%D0... (more) |
— | over 3 years ago |
| Comment | Post #278601 |
Altium did a talk related to the question: [PCB Layout Starts in the Schematics](https://resources.altium.com/p/al-keynote-max-seeley). Good parts of the video: 9:38 - 14:16 about capturing design intent, 26:37 - 31:13 about block diagram and partitioning the schematic. The rest of the talk is show... (more) |
— | over 3 years ago |
| Edit | Post #282862 |
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— | over 3 years ago |
| Edit | Post #282862 |
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— | over 3 years ago |
| Edit | Post #282862 | Initial revision | — | over 3 years ago |
| Answer | — |
A: Is there a mathematical process resembling the terms "digital"/"discrete" and "analog"/"continuous"? > Is there a mathematical process resembling the terms "digital"/"discrete" and "analog"/"continuous"? Rounding (down, or up, or to the nearest integer) is he mathematical process which discretizes value. Multiplication by the Ш-function (Dirac comb) discretizes time. > I always had trouble ... (more) |
— | over 3 years ago |
| Comment | Post #281361 |
Synchronous rectification is a good choice when you have high current and low voltage output. For an example, let's consider a buck converter with V_in = 12V, V_out = 2.5V, I_out = 10A, diode forward voltage V_f = 0.8V. Conduction loss [alone] on the diode will be 4W, which is a lot for a converter... (more) |
— | almost 4 years ago |
| Comment | Post #281307 |
In the scheme of things, IC manufacturers don't owe us explanations about N.C. pins. I've seen, however, datasheets which have both N.C. pins and D.N.C. pins. "Not Connected" and "Do Not Connect". N.C. pins weren't connected internally. They were floating. D.N.C. pins were connected internally a... (more) |
— | almost 4 years ago |
| Comment | Post #281249 |
Yes, there are specialized hand tools for bending leads. Run some web searches for *TO-220 lead forming pliers*. (more) |
— | about 4 years ago |
| Comment | Post #281070 |
Supply chain reason why I usually choose a four-switch buck-boost over a SEPIC. In my experience, inductors go out of stock not infrequently. A buck-boost uses a simple single winding inductor, while a SEPIC uses a coupled inductor. Off-the-shelf single winding inductors are more abundant than couple... (more) |
— | about 4 years ago |
| Comment | Post #280791 |
We could also add 1.8V and 2.5V to the question. (more) |
— | about 4 years ago |
| Comment | Post #280564 |
@Monica Embedded programming was proposed in Area51 twice. The second time it almost made it to private beta. (more) |
— | about 4 years ago |
| Comment | Post #280595 |
(2) Who gets to write app notes varies a lot from one semiconductor company to another. At Microchip, for example, AEs write application notes, and FAEs don't. (more) |
— | about 4 years ago |
| Comment | Post #280595 |
@Lundin Two of my own observations about FAE, AE, application notes. (1) In semiconductor companies, there is a strategic difference between Application Engineers (AE) and Field Application Engineers (FAE). The AEs are competent board-level designers, although more specialized in some particular a... (more) |
— | about 4 years ago |
| Comment | Post #280578 |
Comment regarding the first bullet. A unidirectional TVS protects in both directions, just not symmetrically. It clamps at a much lower voltage in the other direction. (On Semiconductor application notes [AND8231/D](https://www.onsemi.com/pub/Collateral/AND8231-D.PDF) and [AND8424/D](https://www.o... (more) |
— | about 4 years ago |
| Comment | Post #279804 |
@Lundin I'd like to share an article with you: [A Group Is Its Own Worst Enemy](https://web.archive.org/web/20190219183405/http://www.shirky.com/writings/group_enemy.html) by [Clay Shirky](https://en.wikipedia.org/wiki/Clay_Shirky). I've read it many years ago, and it had shaped my perspective. (more) |
— | over 4 years ago |
| Edit | Post #280125 | Initial revision | — | over 4 years ago |
| Answer | — |
A: ESD USB Shield Connection & Filtering A few months ago, I too was looking for answers on how to connect the USB shield with ESD in mind. I always connect the shield through a resistor to ground and a capacitor to ground (100kΩ and 0.01uF). Pulsing ESD into the shield is a part of the test. The ESD will appear across the capacitor,... (more) |
— | over 4 years ago |
| Comment | Post #279900 |
@z3333 Could you tell us the model of your ADC? If the ADC is built into the microcontroller, tell us the model of the microcontroller. This will allow us to reference absolute max values and other parameters for the ADC. (more) |
— | over 4 years ago |
| Comment | Post #279804 |
@Lundin If we let the repair posts accumulate, then everyone who visits our site thinks that repair posts are okay, and they will post more. We will end up with a runaway effect. So, it makes sense to nip this in the bud at an early stage. (more) |
— | over 4 years ago |
| Edit | Post #279804 |
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— | over 4 years ago |
| Edit | Post #279804 | Initial revision | — | over 4 years ago |
| Answer | — |
A: Can I ask about debugging/fixing a broken product? Thanks for asking. Repair questions are off-topic, in general. We may consider a repair question, if you explain your specific troubleshooting steps, and you understand the design of the device. In practice, the second condition means that you should have a schematic. (more) |
— | over 4 years ago |
| Edit | Post #279796 | Question closed | — | over 4 years ago |
| Edit | Post #279739 |
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— | over 4 years ago |
| Comment | Post #276138 |
@eric regarding the R12. If you were using a MOSFET, then indeed you would been a resistor from gate to ground. It would keep the MOSFET gate at a known state when the control signal is disconnected. Current in a BJT base will disappear by itself when the control signal is disconnected. So, the R... (more) |
— | over 4 years ago |
| Comment | Post #279103 |
@MonicaCellio Tell us more about this workflow. Is there a draft on GitHub somewhere? (more) |
— | over 4 years ago |
| Comment | Post #278860 |
@KalleMP The hiding of sub-standard questions have been discussed before. It doesn't work, because it doesn't reduce the number of sub-standard questions. Down- and close-votes highlight the standards to the posters, and prompt them to improve (or leave if they don't care to improve). (more) |
— | over 4 years ago |
| Comment | Post #278860 |
@KalleMP Contributors [don't confuse with consumers] will not stick around if they have to wade through content which they don't appreciate. You must respect that. (more) |
— | over 4 years ago |
| Edit | Post #279025 | Initial revision | — | over 4 years ago |
| Answer | — |
A: ESD Protection - Differential Amplifier [In addition to the answers which have already been posted.] A current sensing circuit like this lends itself to another scheme for ESD protection, which uses only one TVS. Only the line in which you're sensing the current is exposed to ESD. The small value current-sense resistor will keep the d... (more) |
— | over 4 years ago |
| Comment | Post #278984 |
@Lundin Only the people from inside Murata and TDK (and other such component company) can answer that question with certainty (if they themselves know for certain). But they aren't going to share their plans. Anyone else can only guess and speculate. (more) |
— | over 4 years ago |
| Edit | Post #278984 | Initial revision | — | over 4 years ago |
| Answer | — |
A: Are questions about electronics market trends on-topic? I think that the example question in the O.P. should be re-written as design for manufacturing question (DfM, or some other DfX). Electronics market trends questions should be off-topic. It would invite opinion-based speculation. (more) |
— | over 4 years ago |
| Edit | Post #278881 |
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— | over 4 years ago |
| Edit | Post #278881 | Initial revision | — | over 4 years ago |