How to measure frequency of sine wave?
How to measure frequency of sine wave using pic microcontroller? I found the article on this website http://microcontrollerslab.com/sine-wave-frequency-measurement-using-pic/ But I didn’t understand...
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Bioelectrical Body Impedeance Analysis?
On what principle Bioelectrical Body Impedance Analyzer works? I thought about this many times, and I wanted to know is there really a way to precisely measure all those body parameters with this...
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How do you correctly measure the gate voltage of a MOSFET?
If you have a half-bridge, or an H-bridge, or some other usual configuration; and you want to see the voltage you are getting on the gate, to check for any errors and shoot-through. Do you do it like...
View ArticleConvert dB A to dB SPL
I am trying to calibrate an audiometer that gives outputs in dB SPL. However, the sound meter that I am using to calibrate the audiometer registers in dB A. Is there a formula to convert from dB A to...
View Articlemeasure development – removing items from an item pool due to ceiling effect
During the early stages of scale development, many items within our item pool were found to have a strong ceiling effect with low score variability. In order to attempt create a meaningful measure with...
View ArticleHow do scientists measure miniscule constants like the mass and charge and...
What can measure the extremely tiny mass of an electron? Is it through indirect means? The same goes for charge. The pull of a single electron must be infinitely small. And if one is to attempt to find...
View ArticleSample Size for Comparing two Measuring Tools
Let’s say I have two devices that measure the same thing: the thickness of an object. Knowing that device 2 is more accurate and precise, I wish to see how accurate device 1 (how close do the readings...
View ArticleCan a Bell state measurement be described in the Von Neumann measurement scheme?
I have been reading and studying this article recently about non-local weak measurements and quantum erasure. Usually the weak measurement formalism is described using the Von Neumann scheme for...
View ArticleCorrelation is moderate but Path coefficients (in pls-sem) show insignificant...
I am performing PLS-SEM analysis (usng plspm package), the outer loading’s are significant as CI do not include zero on any of them However, large number of path coefficient’s (i.e, inner model)are...
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Stern-Gerlach apparatus, measurement problem? [closed]
Consider the diagram below: It is 3 Stern-Gerlach apparatus along with some ‘lenses’ (illustrated here by lines). Question What would the output at A and B be? Additional information The problem with...
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Can I measure distance with sound through soil?
Can you measure distance (cca. with precision 0.1m-1m) with sound through soil. I know this is really crazy think to do, but I have this idea quite for a while. Basically I will set speakers on fix...
View ArticleHow to measure the diameter of a thin wire? [closed]
I’m working on a project and I need to measure the diameter of a thin bare copper wire but I don’t know how. Can you please tell me a way to measure the diameter of a wire? Can you give me a way, using...
View ArticleEstimating battery capacity remaining from SLA connected to motors
I have an SLA battery, at say 10 Amp-Hours, connected to 3 high power motors. Each motor can draw up to 10 Amps each (worst case / max power). Using Q = It as an approximation, I see that I get 1200...
View ArticleInformation and entaglement via determination of the first's system state...
Could we have entangled systems (microscopical or macroscopical) and construct a way of altering the state of one of the two entangled parts (let’s say by Alice) via interaction and thus making the...
View Articlesimilarity between two sentences
I have run an experiment where users were given a distorted sentence and asked to restore it. Currently, I am interested to grade the results on the scale between 0 to 1. I’m wondering if there any...
View ArticleMeasuring P and Q of house appliances
In order to obtain Power-Voltage characteristic of domestic loads (coffeemaker, microwave oven etc) I need to measure consumed active and reactive power at vooltage range U=[0.9-1.1]Un. Is there...
View ArticleHow to measure telephone DTMF tones with an oscilloscope?
I have a situation where I’m trying to connect two computers via their dial-up modems. I’ve built a line voltage simulator (9v @ 40ma) into the line that connects them, and I’ve tested with a telephone...
View ArticleHow does one describe a state with a density matrix after measuring position?
My question is about position measurement in non relativistic quantum mechanics. I’ve been taught that when you measure the value of an observable for some state of a system described by $|psirangle$...
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LCR Meter Measurement
Good Morning All I have a DC link Choke ( Common EI Core), When measuring through LCR meter It gives me reading (see table.). When Adding Inductor in Series ( Pic 3 and Pic 4) it Give the value that is...
View ArticleIs it possible to determine capacity and voltage rating of an unknown...
Today I found a big electrolytic capacitor in a scrap yard. It is about 9 cm in diameter and 16 cm high. The only thing that is marked on it is polarity but nothing else. How can I measure its...
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