Activity for Lorenzo Donati
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Comment | Post #289280 |
I agree with your rationale behind differentiating between voltage and current (that's important in many different context). I think in most places you can do that using more specific tags. E.g. `current-loop`, `ground-loop`, `ground-bounce`, `4-20mA-loop`.
I'm trying to understand whether we cou... (more) |
— | almost 2 years ago |
| Comment | Post #285170 |
@#36396 "I've got several ideas for papers, but it's hard to take the time." You could post in meta a question where you suggest the topics you think will be interesting. If you can't write a paper or a self-answered question, maybe someone else could.
This could also motivate some users to do som... (more) |
— | almost 2 years ago |
| Edit | Post #284207 |
Post edited: Retagged. |
— | almost 2 years ago |
| Edit | Post #282671 |
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— | almost 2 years ago |
| Edit | Post #289204 |
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— | almost 2 years ago |
| Comment | Post #276200 |
@#52987 My compliments for your drawing skills, then! Especially for that axonometric plot. (more) |
— | almost 2 years ago |
| Edit | Post #289244 |
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— | almost 2 years ago |
| Edit | Post #289244 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: H(jω) does not exist for unstable systems, but we still use it when designing controllers - contradiction? I don't have that book, but the statement you cite (emphasis mine): > ... when s=jω the integral on the RHS of eq. 2.48 does not converge for unstable systems doesn't mean the transfer function for an unstable system doesn't exist. The book makes a lot of confusion between Transfer Fun... (more) |
— | almost 2 years ago |
| Edit | Post #289220 |
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| Edit | Post #289220 |
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— | almost 2 years ago |
| Edit | Post #289220 |
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| Edit | Post #289220 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: Why 3.3V instead of 3V? Sorry, but I have to challenge your premises when you say that most numbers are "round numbers" and that could be a reason for choosing some value. You compare those values by the number of decimal digits, but that's the wrong comparison. You should compare the significant digits. In fact wh... (more) |
— | almost 2 years ago |
| Edit | Post #280791 |
Post edited: Typo. |
— | almost 2 years ago |
| Edit | Post #282627 |
Post edited: Typo. |
— | almost 2 years ago |
| Edit | Post #289217 | Initial revision | — | almost 2 years ago |
| Question | — |
Tags about quantities: should we have them? I've noticed there are a lot of tags referring to general physical quantities (e.g. `current`, `voltage`, `frequency`) I'm not sure if they are useful. For example, what usage would have the tag `voltage`? If a question is about a particular voltage, e.g. breakdown voltage for a diode or threshol... (more) |
— | almost 2 years ago |
| Edit | Post #286121 |
Post edited: Typos. |
— | almost 2 years ago |
| Comment | Post #289205 |
Please, edit your question inserting the part number of those chips directly in the text, and maybe add a short excerpt of the datasheet.
As it stands if the links you provided breaks, your question will be quite useless for other people. (more) |
— | almost 2 years ago |
| Edit | Post #279783 |
Post edited: Reformatted for better readability. Some minor grammar and wording adjustments. |
— | almost 2 years ago |
| Comment | Post #289204 |
@#36396, @#8046 Thanks! (more) |
— | almost 2 years ago |
| Edit | Post #287435 |
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— | almost 2 years ago |
| Edit | Post #277275 |
Post edited: Retagged. |
— | almost 2 years ago |
| Edit | Post #280819 |
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— | almost 2 years ago |
| Edit | Post #279783 |
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— | almost 2 years ago |
| Edit | Post #289204 | Initial revision | — | almost 2 years ago |
| Question | — |
Tag naming guidelines. I've done a lot of work on tags lately and I'd like to share with the community some thoughts about the way tags should be named so that maybe it could become part of the FAQ and so hopefully lead to a more uniform tagging practice. + Acronyms should be spelled in all uppercase. This to avoid co... (more) |
— | almost 2 years ago |
| Comment | Post #276200 |
@#52987 May I ask you which software did you use for making that drawings and plots? (more) |
— | almost 2 years ago |
| Comment | Post #276306 |
@#36396 OK, but there is no clear grammatical link to the previous sentences (firmware or execution is not mentioned in the previous test).
Maybe it's because I'm not a native English speaker, but rereading that part I can't completely understand it from the words alone. As I said, I got perfectl... (more) |
— | almost 2 years ago |
| Comment | Post #276306 |
Hi Olin! Great answer, BTW! I think there is a problem with this sentence ` If not, it stays in the bootloader constantly requesting a upload until something with a valid checksum gets loaded into memory. `
The general meaning is clear but the sentence seems weird. What "stays in the bootloader"... (more) |
— | almost 2 years ago |
| Edit | Post #278616 |
Post edited: Removed premise that is irrelevant to the question, but it is something about the rules of the website. |
— | almost 2 years ago |
| Comment | Post #276295 |
@#52987 BTW, I notice now the link to that calculator is broken. (more) |
— | almost 2 years ago |
| Comment | Post #276295 |
@#52987 Great! This has bothered me for a long time. I always suspected there there was some kind of exponential relationship between rated lifetime and actual lifetime wrt. temperature, but never found a source. Also good the relationship with actual working voltage (didn't know that at all).
All... (more) |
— | almost 2 years ago |
| Edit | Post #276295 |
Post edited: Typo. |
— | almost 2 years ago |
| Edit | Post #278687 |
Post edited: Changed formatting to use real footnotes. |
— | almost 2 years ago |
| Edit | Post #279746 |
Post edited: Typo. |
— | almost 2 years ago |
| Comment | Post #288246 |
Please, post better images. The details in your drawings are barely visible. (more) |
— | almost 2 years ago |
| Edit | Post #289161 |
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— | almost 2 years ago |
| Edit | Post #289161 |
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| Edit | Post #289161 |
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| Edit | Post #289161 |
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| Edit | Post #289161 |
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| Edit | Post #289161 |
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| Edit | Post #286179 |
Post edited: Removed ambiguous tag: SAR alone means Synthetic Apertur Radar. Added more specific tag. |
— | almost 2 years ago |
| Comment | Post #289161 |
@#36396 Yep! Thanks for the nudge, anyway. I will keep papers in mind in the future if I come up with something more structured and the time to write it. (more) |
— | almost 2 years ago |
| Comment | Post #277090 |
@#53110 The one with the Zener won't work either. Even if you used a very low voltage Zener, or a couple of series-connected rectifiers, you would have at least 0.7V across R1, which means 2.6V to be shared between the LED and the CE terminals of Q1. Since this latter needs to be in its active region... (more) |
— | almost 2 years ago |
| Comment | Post #277090 |
@#53110 Although the circuits you post are nice, they won't work with such a low voltage as supply. They won't have enough compliance.
In particular your circuit with the TL431 can't work. You are trying to put the BE junction of the BJT into the control loop of the TL431 to get 2.5V at the emitt... (more) |
— | almost 2 years ago |
| Edit | Post #289161 |
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— | almost 2 years ago |
| Comment | Post #289161 |
@#36396 Thanks for your words. I really didn't think of papers. I was trying to write something for the wiki of the dynamic-resistance tag and it went "out of hands" quickly. So I thought to a "canonic" q&a.
Unfortunately I have no extra time to make good graphs (they are really time-wasters, at ... (more) |
— | almost 2 years ago |