Activity for Olin Lathrop
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #288006 | Initial revision | — | over 1 year ago |
| Answer | — |
A: What is the role of master clock speed on DAC In protocol I2S we have 4 signal: 1.data 2.lrck/fck (frame synchronizer) 3.bck (bit clock) 4.mck/sck (master clock) Not really. IIS really only has 3 signals: bit data, bit clock, and left/right indication. Take a look at the actual IIS protocol from NXP. Some implementations do use a "master... (more) |
— | over 1 year ago |
| Edit | Post #287957 |
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— | over 1 year ago |
| Edit | Post #287957 | Initial revision | — | over 1 year ago |
| Answer | — |
A: What does it mean for a signal to have impedance? Impedance Yes, impedance is "extended" resistance. Impedance is really a complex value, with resistance it's real part. The imaginary part represents pure inductance or capacitance (with opposite sign). Sometimes we say "impedance" when really only the resistance is relevant. That's OK since r... (more) |
— | over 1 year ago |
| Comment | Post #287952 |
@#54288 Is the issue that you don't understand what it means for signals to have impedance in general? That's a valid question, but not something that should be buried in comments in a totally unrelated question. Ask about signal impedances in a separate question. (more) |
— | over 1 year ago |
| Edit | Post #287950 | Initial revision | — | over 1 year ago |
| Answer | — |
A: Testing instrumentation amplifier with differential signal I think the biggest reason is that it may be difficult to control your function generator with an output of only 5 mV. Some function generators have different output ranges that are switched, then a volume knob that lets you select from 0 to the maximum for the current range. Even if it has a 100 m... (more) |
— | over 1 year ago |
| Edit | Post #287944 | Initial revision | — | over 1 year ago |
| Answer | — |
A: Using arc trace routing instead of 45 degree trace routing The best route is a straight connection between the two points being connected. Of course that's not always possible due to other objects being in the way, or to be able to route other connections. I think most auto-routing software uses 45° bends because that's a reasonable tradeoff between ... (more) |
— | over 1 year ago |
| Comment | Post #287801 |
The speed Elsewhere has to do with how many people are watching and when the moderators are active. They have more people and more active moderators than here, more spread across time zones. You were originally offered to be a moderator, but you declined. I'd support you being a moderator if you'v... (more) |
— | almost 2 years ago |
| Edit | Post #287801 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: Should a fake user's posts be deleted if the fake user has subsequently been deleted by the site It's a balance. On one had, we want to be a store of knowledge. It doesn't matter what prompted a particular piece of information to be posted if it serves the long term purpose. We also don't want volunteers that wrote answers in good faith feel like they wasted their time because the original ... (more) |
— | almost 2 years ago |
| Comment | Post #287773 |
@Lundin You are right, those resistors don't make sense. At total of 37.5 kΩ wouldn't let the relay turn on with 12 V as shown. I suspect something wasn't copied correctly. Maybe the C109 and 12 V are supposed to be on the left side of the resistors with high voltage on the right. Even then there... (more) |
— | almost 2 years ago |
| Edit | Post #287773 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: How Relay inrush current limiter works? It's a current limiter, not eliminator. The current is always supposed to flow, but be limited at startup to avoid high inrush current. All the relay does is short out R103 when activated. The relay starts out off, so R103 is in series with the input power when the device is first plugged in or ... (more) |
— | almost 2 years ago |
| Edit | Post #287751 |
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— | almost 2 years ago |
| Comment | Post #287746 |
Argh! Does that mean "microwave <i>oven</i> transformer"? If so, I just wasted time writing a lengthy answer that would have been rather different with this information. First, only use absolutely universal abbreviations in your question. Second, put the information directly in the question. Don... (more) |
— | almost 2 years ago |
| Edit | Post #287751 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: how to figure out the max power of a transformer? If there isn't a VA rating on the label or published in a reliable source, then you have to guess. There are several clues that can be used: Look at the size of the primary wires. That gives you an upper bound on the primary current. You know this is meant for 220-240 V systems, so between thes... (more) |
— | almost 2 years ago |
| Comment | Post #287746 |
What's a "MOT"? (more) |
— | almost 2 years ago |
| Comment | Post #287728 |
You think you found what this circuit is called, but a "negative impedance converter" isn't a standard name I'm aware of. It's also the third circuit you posted in the same question, and quite different from the first that you initially asked about.
It's much more important to *understand* how a ... (more) |
— | almost 2 years ago |
| Edit | Post #287729 |
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— | almost 2 years ago |
| Edit | Post #287729 |
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— | almost 2 years ago |
| Edit | Post #287729 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: What we call this opamp configuration? [SOLVED] What we call this opamp configuration? A mess. What's the advantage and the disadvantage of this circuit? This can't be judged without the stated objectives. It might be useful for keeping undergrads busy trying to analyze this circuit. And what's the purpose of the L2 ... (more) |
— | almost 2 years ago |
| Edit | Post #287727 |
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— | almost 2 years ago |
| Edit | Post #287726 |
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— | almost 2 years ago |
| Edit | Post #287727 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: Audio OpAmp requirements The specs you need from an opamp in an audio circuit are somewhat dependent on the particular circuit. As you state, requirements of good audio circuits are high signal to noise ratio and low distortion, relative to many other analog circuits. The noise figure of an opamp is usually a fixed value... (more) |
— | almost 2 years ago |
| Edit | Post #287726 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: Why arc welding does not require high voltage to arc? It takes high voltage to start the arc. Once started, the air is ionized, and becomes fairly conductive. It then takes much less voltage to keep the current flowing to sustain the arc. This also explains why you have to touch the terminals together to start the arc. Touching shorts the output, ... (more) |
— | almost 2 years ago |
| Comment | Post #285186 |
Oops, you're right. The actual schematic is correct, and the device works as expected, but I apparently didn't pay attention to the dots when drawing up this less-cluttered version. In the real schematic, the secondary is flipped. The top part is connected to ground, with the bottom end feeding th... (more) |
— | almost 2 years ago |
| Comment | Post #287689 |
@Freewill Only **you** can answer that question. We don't know your application and therefore how tolerant it is to noise on the sine wave. This is one of the questions we've been asking you all along.
If you can't quantify the parameters we asked for, you can at least explain how you intend to ... (more) |
— | almost 2 years ago |
| Comment | Post #287689 |
*who want an inaccurate circuit* - The point is all circuits are inaccurate. You will always get an inaccurate circuit. The important question is then **how** inaccurate is tolerable. There is a wide spectrum of tradeoff between the various performance characteristics of a sine wave generator. Di... (more) |
— | almost 2 years ago |
| Comment | Post #287689 |
*I finished by giving all information necessary to get helped:* - No you didn't. That's the problem.
*frequency range* - Yes, that's useful. That was clear in the question, so I didn't ask about it further.
*amplitude, current* - Those don't matter, because that would just be an issue for an... (more) |
— | almost 2 years ago |
| Comment | Post #287689 |
@Freewill: I asked you several questions, but you only answered one of them, and then with an impossible value. We tried to help, but you wouldn't cooperate and do your part. If you want to continue, carefully read the questions I posed in the comment titled "Specs?", then specifically answer each ... (more) |
— | almost 2 years ago |
| Edit | Post #287689 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: What Sine-Wave Oscillator can be controlled with a microcontroller? pure stable sinusoidal wave This is impossible. Forget it. Go home. No matter what you do, there will always be some noise added to the sine wave. Some random noise and some harmonic distortion are inevitable. (more) |
— | almost 2 years ago |
| Comment | Post #287678 |
How accurate does this "sine wave" need to be? THD? Max error as fraction of full scale? Some other metric? How well must amplitude be controlled, like ±3dB over the full range for example? How do you set the frequency? How accurate does the result need to be to the setpoint? There are various p... (more) |
— | almost 2 years ago |
| Comment | Post #287646 |
Saying to "never" use the auto-router is going too far. Auto-routers can be useful tools. But, as with any tool, you have to understand what it's good at and what not, and use it accordingly. You have to know your auto-router, what all the settings do, and make sure you set them appropriately for ... (more) |
— | almost 2 years ago |
| Edit | Post #287646 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: Unterminated SPI bus needs expansion board to work properly At 1 MHz it's probably not transmission line effects. It's not clear from your question whether the SPI bus works on the main board with the expansion board connected, but not when it's not connected. If so, I expect you're right about the additional capacitance. An easy way to check this is to ... (more) |
— | almost 2 years ago |
| Edit | Post #287629 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: How to check realistic specs of small solar panel? Your proposed circuit will work, but "before the voltage drops significantly" is rather wishy-washy. I would at least use a second meter to measure the current. What you really want to know is the power, which is the voltage times the current. With two meters you can sortof eyeball it and find a... (more) |
— | almost 2 years ago |
| Comment | Post #287535 |
This is a question and answer site, not a threaded discussion forum. If you have more information about the question, add it to the question. I have deleted your "answer" because it did not answer the question. (more) |
— | almost 2 years ago |
| Edit | Post #287535 |
Post edited: Removed time-wasting content-free fluff. |
— | almost 2 years ago |
| Edit | Post #287536 | Initial revision | — | almost 2 years ago |
| Answer | — |
A: Possible stray current corrosion in reinforced concrete First clarify where this leakage current will be flowing. You seem to think that some parts of the solar panel will generate a small current thru the rebar into the ground, but where is the closed loop? The polarity also matters. Current flowing one direction from steel to dirty water causes cor... (more) |
— | almost 2 years ago |
| Edit | Post #287533 |
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— | almost 2 years ago |