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8 votes

How do I read the component dimension labels given in a schematic?

The figures underneath the solid lines are in millimeters, the ones above the line are in inches. The X.XXX - X.XXX is a range, to account for variations in manufacturing. So for example, the width ...
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5 votes

How to graph a dimensionless ratio as the parameter on an XY graph?

A similar graph from a another discipline is the following Basically you will need to plot for each test (which I assume had a different d/S), the values of your experiment. So for each d/S you ...
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5 votes

Is there any speed difference if we replace a 200-300 meters of copper cables with optical fiber cables? Whats the reason if it increases?

Fiber cables have higher data transfer speed not because light travels faster in a fiber than electromagnetic waves in a copper wire, but because they can be modulated by signals having far higher ...
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5 votes
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What is a good reason if the data from analysis and measurement does not give a good agreement?

Two possibilities come to mind: One, the assumptions / theory / model is not describing / modelling the situation correctly, Or, Two, the source data is incorrect / has an error at those locations -...
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4 votes
Accepted

What is the best graph type to show a comparison value between two cases?

Based on the discussion in comments, you probably want to use a bar chart combined with a line for the error. Have a look at Create a combination chart for more details. In your case, and using dummy ...
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  • 1,806
4 votes

How do I remove outliers in measured sound pressure levels data?

What you are asking is not trivial. As PeteW said, you probably will find something in DSP, although this might be a bit too basic for them. The problem with sound measurements is that the amplitude ...
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  • 22.7k
4 votes

Calibrate a sensor using another, already calibrated sensor

The starting point is to recognize that your calibrated sensor is first used to calibrate your light source, and then your calibrated light source is used to measure the response of your second ...
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3 votes

Calibrate a sensor using another, already calibrated sensor

Apart from Jeffrey's excellent analysis I'd like to point out that, assuming that sensor A is calibrated and has a linear response, it seems like sensor has a non linear response. Figure 1: Excel ...
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  • 22.7k
3 votes

Calibrate a sensor using another, already calibrated sensor

Plot dat_A against dat_B. Fit a curve to it (linear would be the simplest). Use the curve as a lookup table to lookup sensor A ...
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  • 626
3 votes

How to display data with three degrees of freedom on a chart?

Per @Dan's suggestion, I googled "nomography" and found an article titled "The Lost Art of Nomography" by Ron Doerfler, published in the UMAP Journal 30.4 (2009). The article describes a compound-...
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  • 2,989
2 votes

How can I calculate the rate of power consumption of a solar car along a known route with changes in elevation?

Having done this before when I was in college on the solar car team, designing and building cars for Sunrayce '97 and '99, I'll tell you that you're on the right track, but you need to start with a ...
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  • 2,135
2 votes

I just learned about signed magnitude ,1's complement and 2's complement representation and I want to make sure that I understood them

Yup. You can test your 2's compliment math on a calculator that displays binary. For $n$-bit numbers, you negate the number by subtracting it from (positive) $2^n$. So -17, in 2's compliment, is ...
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  • 2,228
2 votes

How to find raw data sets for engineering?

Search for daily maximum and minimum temperatures for your local region. If there is a river nearby, search for river level or river gauge height. If it rains, search for annual rainfall in your ...
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2 votes
Accepted

Why laptop keyboard has so many bus lines?

The keyboard contains many switches (100 in my keyboard at this moment) and the simplest solution for a keyboard assembly that contains no decoding circuitry would be for each switch to have its own ...
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2 votes

Calibrate a sensor using another, already calibrated sensor

Figure 1. Making a scatter-plot on Google Sheets and adding in a trend line suggests that you've got a good chance. A quick search shows many articles on find the equation but it would be simple ...
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2 votes
Accepted

Incorporating a dichotomous failure model for sustainment analysis

Modeling future behavior using past behavior is fraught with pitfalls. This is why we test large numbers of parts before turning the factory on and stocking the product in the warehouse. That said... ...
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1 vote

Is there any speed difference if we replace a 200-300 meters of copper cables with optical fiber cables? Whats the reason if it increases?

Niels Nielsen's answer is correct. Just to provide some calculations as to actual propagation speeds (not signal bandwidth): Typical optical fibers have $n\approxeq 1.5$ , so the propagation speed is ...
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1 vote

How do I remove outliers in measured sound pressure levels data?

If the data is over a 24h period and you have the times of these "other" sources causing the outliers then you can exclude those times from the general analysis. Deleting those time entries ...
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  • 14.1k
1 vote

Do LiDAR sensors generate point cloud data from a single collection or build them up over multiple collections?

Are you asking how a scanning LIDAR physically works? Or just the format in which it outputs data? I feel that you're overthinking something. Because the raw data that is obtained by a LIDAR is the ...
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  • 3,325
1 vote

LAN data from computer

As stated by @NMech, I would suggest using a sniffer. I am assuming your connections are something like the following. I would use wireshark which a very popular open source tool used by network ...
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1 vote

LAN data from computer

Since I don't know anything about the Siemems MP377 (what does it do and how its connected to the printer e.g. through a hub or with a direct crosslink cable), one way i could go is using a sniffer (...
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  • 22.7k
1 vote
Accepted

Measurement of immobile curved surface

If the holes are small enough and you don't care about spacing measurements, you could use what are called pin gauges. These will obviously not work on non-circular holes (irregular?) These are ...
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  • 6,282
1 vote

How to find the wear rate of materials in the net?

Maybe you should check out tribology. There is such thing as specific wear rate, k, for example, which is given for a pair of materials in dynamic contact. Say steel over steel has very low ...
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  • 11
1 vote

Calculating gyro data from accelerometer, pitch, roll and yaw

Accelerometers are capable of measuring the acceleration they experience relative to free-fall. Accelerometers are used to measure the upwards acceleration that counters gravity when at rest, its a ...
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1 vote

Choosing significant figures when dealing with a wide range of values

The fundamental problem here is that you've got a bunch of numeric values which are not in engineering/scientific notation, so you have to make up some arbitrary guesses as to how many sig figs really ...
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1 vote

Difference between broadcasting operation and one-to-many in RF transceiver

A broadcast operation involves flashing the data just like a notice board, and whoever requires the data, can read it from the node or terminal broadcasting it. Hence, any node which comes in the ...
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1 vote
Accepted

Viscosity of select species at atmospheric pressure for very large temperatures?

See NASA's computer program CEA (Chemical Equilibrium with Applications). From this site you can download an application to perform calculations. This application contains a text file called ...
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1 vote

Viscosity of select species at atmospheric pressure for very large temperatures?

Andre, I assume you've got an answer to this question by now; please tell us how you solved it! – NauticalMile Unfortunately I didn't found any information regarding the high temperature values for ...
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1 vote

How is RF data encoded in WAV files?

SDR is normally done with I (in-phase) and Q (quadrature) channels. You can think of them as the two components of a complex number. These allow you to preserve the phase information through your ...
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  • 6,759
1 vote

How can I calculate the rate of power consumption of a solar car along a known route with changes in elevation?

The equation you included in your question only considers horizontal distances (x and y). You need to use slope distances (three dimensional distances: x, y and z) as these will be the true distances ...
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  • 9,517

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