Activity for Olin Lathrop
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Comment | Post #281353 |
@Curious: You'd have to see what the manufacturer says. As for the 50 Ω to power, that is probably for impedance control, assuming 1:1 transformer ratio. (more) |
— | about 3 years ago |
| Comment | Post #281323 |
You need to check your math. 110 V across 500 kΩ causes much much less than 200 mA. (more) |
— | about 3 years ago |
| Comment | Post #281289 |
What do you plan to do about it even if you do find datasheets? (more) |
— | about 3 years ago |
| Comment | Post #281274 |
Nice answer, +1. However, there were ICs well before the 1990s. You may be surprised to find that even back in the 1960s we had sliced bread, flush toilets, and integrated circuits. (more) |
— | about 3 years ago |
| Comment | Post #281083 |
You originally said this was a radio. Now you say it's a transmitter. Which is it? (more) |
— | about 3 years ago |
| Comment | Post #281083 |
Something doesn't make sense. Why do you care about harmonics at the antenna level? Surely your tuner will filter those out anyway. As long as the antenna resonates well and has the right impedance at the desired frequency, why do you care how much it picks up harmonics too? The first tank circui... (more) |
— | about 3 years ago |
| Comment | Post #281021 |
It really should be obvious that discussion of *"temporarily not be able to use something"* (like digital currency) has nothing to do with electrical engineering, and is therefore off topic here. (more) |
— | about 3 years ago |
| Comment | Post #281021 |
It is rambling in the sense that its not related to EE. Asking about characteristics of EMP is reasonable. Theory of electricity can be applied to the answer. It might be reasonable to ask how specific devices are effected by EMP, like computers. We don't care what those computers are running, th... (more) |
— | about 3 years ago |
| Comment | Post #281021 |
The first part of your question at least is an electrical and physics issue. The rambling about digital currency doesn't make much sense, doesn't actually ask a question, and isn't about electrical engineering. This is why I am going to delete it. (more) |
— | about 3 years ago |
| Comment | Post #280927 |
@2kind: LEDs usually can't tolerate much reverse voltage either. D2 is not strictly needed according to your specs. If you're fine with the absolute minimum input voltage being whatever the maximum B-E reverse voltage is of the transistor, then you can leave out D2. However, stuff happens, and D2 ... (more) |
— | about 3 years ago |
| Comment | Post #280893 |
*"When input is low, the opto should be off therefore “PIN_PROG_1” should be high"* This makes no sense. When the opto is off, PIN_PROG_1 will be low because it will be pulled down by R73. You can always flip polarity by how the opto output is connected. The opto should be off for the input polari... (more) |
— | about 3 years ago |
| Comment | Post #280893 |
What do you mean by "active low". Should the opto be on when the input is low? You need to specify the full input range (you seem to have only specified the maximum), and what the function of input to output is. What threshold voltage? What input impedance is required? Is a gray area allowed, or... (more) |
— | about 3 years ago |
| Comment | Post #280870 |
Half that page has some foreign script, like Arabic or Hebrew. Besides, I don't want to read a whole manual. *You* should explain in a paragraph or so what this thing is supposed to do, what the user interface is, etc. I've never heard of a "grid dip" before, and certainly have no idea what you th... (more) |
— | about 3 years ago |
| Comment | Post #280870 |
The schematic is pretty hard to read. A better scan at higher resolution would help. It would also help to explain what this device is supposed to do, and what external connections have what properties. It looks like it has pluggable modules at right, some sort of oscillator, and a control to adju... (more) |
— | about 3 years ago |
| Comment | Post #280791 |
It's a number somebody picked from a whole set of tradeoffs. Note that 3.3 V is just about 2/3 of 5 V. (more) |
— | about 3 years ago |
| Comment | Post #280626 |
What you say works well when there is virtually no startup torque, like with a propeller. For loads that require some torque to move at all, you need to slowly rotate the magnetic field so that the 90° condition of maximum torque is guaranteed to occur. After that you assume the rotor stays locked ... (more) |
— | over 3 years ago |
| Comment | Post #280600 |
We don't know what you think a "half-Wilson" mirror is. If you want to compare two circuits, show the schematics of both of them. Also the current would be a step, not "ramping" up and down. Do you mean the *voltage* ramps up and down to nearly both rails? (more) |
— | over 3 years ago |
| Comment | Post #280582 |
What documentation you need is already dependent on individual posts. If this site was getting 10s of questions per day, I wouldn't mind a new category. However, with the current volume it will only highlight the fact that there is low activity here. Look at what too many categories did to the Pho... (more) |
— | over 3 years ago |
| Comment | Post #280582 |
I agree with what you said, but don't think a new category is necessary. These questions can already be asked in the main Q&A right now. The volume there is quite low now. If we ever get overrun, we can think about a new category then. (more) |
— | over 3 years ago |
| Comment | Post #280450 |
@Lundin: The catching fire part was probably the visual effect of arcing. When the worker jumped out of the truck, he was probably still nearly touching it when he also touched the ground. This greatly reduced the insulating clearance, due to the body being essentially a conductor. The 700 kV jump... (more) |
— | over 3 years ago |
| Comment | Post #280450 |
Why the downvotes? Somebody has to design these things, and the voltage they run at must be a consideration. Asking about the design tradeoffs is totally legitimate. (more) |
— | over 3 years ago |
| Comment | Post #280395 |
@Chup: That's not how data sheets work. (more) |
— | over 3 years ago |
| Comment | Post #280344 |
Done. See https://electrical.codidact.com/posts/280357. (more) |
— | over 3 years ago |
| Comment | Post #280344 |
What's the rep change for votes now? Let's set the gain from upvotes to 3x that, and the decrease from downvotes to the same value (3x whatever upvotes are now, not 3x the current downvote decrement). (more) |
— | over 3 years ago |
| Comment | Post #280344 |
Also, do what is most convenient with the existing rep. I don't care whether the rep bump from the existing papers stays what it is now, or gets re-calculated as it if happened on the new post type. Whatever works best for you. The rep from a few papers shouldn't be that much in the overall scheme... (more) |
— | over 3 years ago |
| Comment | Post #280344 |
Thanks, that clears up some of my confusion. If it's easy to do, how about convert all posts in the Paper category to a new Paper post type, with ±20 rep per vote? ±30? I don't want this to be burdensome on you folks. It's a nice to have, but we are getting along well enough without it. Pa... (more) |
— | over 3 years ago |
| Comment | Post #280327 |
@Andy: Maybe, but in the top picture you can clearly see that the loop has no effect on the other cable. It may be just a parallax thing in the second picture. I'll try to get back there and take more detailed pictures from better angles. (more) |
— | over 3 years ago |
| Comment | Post #280344 |
If I understand this right (I got a little confused), you can't set the rep value of votes per category, but can per post type? Sounds strange, but I'm not a web developer. The proposal is then to create a "Paper" post type, and convert all existing posts in the Papers category to the new post type... (more) |
— | over 3 years ago |
| Comment | Post #280040 |
I just noticed that too this morning, +1. Hopefully someone can fix this. (more) |
— | over 3 years ago |
| Comment | Post #279969 |
Or just Shottky diodes to ground and the A/D supply. The Shottkys should kick in before the protection circuitry of the A/D. With a normal silicon junction drop, the internal protection circuitry might take most of the load. (more) |
— | over 3 years ago |
| Comment | Post #279967 |
Your continual small edits are getter rather annoying, as they keep pushing old questions to the top of the active list. Give it a rest already! (more) |
— | over 3 years ago |
| Comment | Post #279860 |
*"can not upload pictures"* is too vague. You should describe exactly what you did, and what the response of the system was. Also, this probably belongs on main meta, where it will likely get more visibility. (more) |
— | over 3 years ago |
| Comment | Post #279819 |
@2kind: I'm not sure what you mean. There is little difference. Perhaps you are asking about them being stable. They are inherently stable in that they won't run away with oscillations of increasing amplitude. That doesn't mean they can't still be meta-stable with a lower frequency on the output ... (more) |
— | over 3 years ago |
| Comment | Post #279816 |
@Andy: I took that to mean that the point of this circuit is to be an isolated power switch. POWER_IN would be the incoming supply, and POWER_OUT the line being the switched. Presumably the load would be connected between POWER_OUT and some "POWER_RETURN" that is not shown. Perhaps the OP can clar... (more) |
— | over 3 years ago |
| Comment | Post #279803 |
@dust: Then you have a broken Roomba. Get a new one. This is not something you can fix. (more) |
— | over 3 years ago |
| Comment | Post #279785 |
@Pac: Your second question doesn't make any sense, so I ignored it. (more) |
— | over 3 years ago |
| Comment | Post #279728 |
That's a bit better, but brings up other questions. Why are there two different FETs back to back for the switch? Where is the load? You mention communications interfaces, but none are shown in the schematics. What's the point of the current sources (I1 and I2 in your schematics)? You also have ... (more) |
— | over 3 years ago |
| Comment | Post #279728 |
There is way too much hand waving here. Draw a block diagram, and define your terms. We don't know what you think a "LVD domain" and a "PMSM inverter" are. And what is "1.000,00 uF" supposed to mean? Is that really 1 uF to absurd precision, or some screwup with commas and points? (more) |
— | over 3 years ago |
| Comment | Post #279602 |
Various things are still missing. All the answers to https://electrical.codidact.com/questions/279585 is one obvious example. Note that the question list says "3 answers" (which seems correct from memory), but there are none in the question itself. (more) |
— | over 3 years ago |
| Comment | Post #279413 |
**Inappropriate comments deleted.** Comments are not for content, and certainly not for chatting between two users who didn't even write the answer the comments are under. **Knock it off already!** If you want to explain to someone what a "load line" is, or anything else for that matter, put that ... (more) |
— | over 3 years ago |
| Comment | Post #279431 |
Good circuit, +1. However, I'd break the pot up into a fixed resistor for the top part, and a pot to only allow up to a volt or so max for the bottom part. That reduces the settings that might cause damage, in addition to giving you higher adjustment resolution. With 100 kOhm fixed and a 10 kOhm p... (more) |
— | over 3 years ago |
| Comment | Post #279402 |
**Question cleaned up, and comments that became a discussion deleted**. tlfong01, don't get used to others cleaning up your questions for you. This site is for questions and answers, not long winded side stories or discussions. Let this be an example of how you should have asked. Others, if you ha... (more) |
— | over 3 years ago |
| Comment | Post #279103 |
@Lundin: Feedback needs to be public so that everyone can see what the norms are, and that they are applied fairly. I certainly don't want to explain why 20 similar post are too broad, when doing it only a few times may head off the others. If you can't handle being publicly criticized, then you do... (more) |
— | over 3 years ago |
| Comment | Post #279250 |
What you call "confrontal" is bluntness, and somewhat deliberate. Experience elsewhere has shown that subtlety is merely an invitation to ignore the content. (more) |
— | over 3 years ago |
| Comment | Post #279103 |
One thing that helps to address this issue is to have reasonably good explanations of why the question was closed. In the particular case cited, I think the close text explains the situation reasonably well. If users genuinely want to understand what is wrong with their question, they will find sup... (more) |
— | over 3 years ago |
| Comment | Post #279010 |
@Circ: No, a little positive feedback doesn't make it a latch. It adds hysteresis. The more positive feedback you add, the larger the hysteresis interval. (more) |
— | over 3 years ago |
| Comment | Post #279016 |
All your schematics except Fig 7 are basically unreadable again. You seem to think all those lines "show" things, but they really clutter up the drawing and make it hard to see the circuit under all that mess. (more) |
— | over 3 years ago |
| Comment | Post #279010 |
@Circ: No, what he "invented" was just a comparator with a lot more parts than necessary. (more) |
— | over 3 years ago |
| Comment | Post #278989 |
What "TVS diode"? I don't see a TVS anywhere in that schematic. (more) |
— | over 3 years ago |
| Comment | Post #278984 |
@Lundin: How a question is worded and what exactly it is asking significantly influences whether answers will be opinions. A good question that someone answers with opinion isn't necessarily the fault of the question, but we want to avoid questions that basically solicit opinions and speculation. (more) |
— | over 3 years ago |