All Questions
Tagged with electrical-engineering measurements
22
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How to measure the electrical properties to ensure the performance of a thin electrode/insulator stack-up?
I am a mechanical engineer by trade, and I am looking at some basic electrical properties that I need to measure to ensure the device meets the desired performance. The device consists of a two-layer ...
- 11
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38
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Help on IR Proximity Sensor Inaccuracy
I want to measure the depth of a burning soil using IR proximity sensor. The sensor will be placed 20cm above the surface of the soil and measures it perpendicularly.
Problem #1:
I'm quite concerned ...
- 385
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60
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Safely Measuring Voltage from Solar Panels in an Experimental Research Field
I'm installing solar panels (not connected to the grid) in units out in a field for research we're doing that looks like this (this is an outdated image, but I can't find the updated one unfortunately)...
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Can you suggest a 0 to 10 Volts mesuring unit with an easy .NET (C#) API? [closed]
I am looking for a voltage input module that measures a voltage input in the range of 0 to 10 Volts (slowly changing during a 5 seconds period). It should be connected to a local Windows computer that ...
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How does the number of cycles for averaging in a lock-in amplifier relate to low-pass filtering and where do I set it?
Please forgive me if I ask too many questions at once or I am too much of a rookie. I want to understand the working-principle of lock-in amplifiers (LIAs).
I understood the calculation that yields ...
1
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2
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175
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BJT Output Characteristics Question
Ok, so I am pretty confused at the moment with a question that I have been given to work out by my lecturer and was wondering if I could get some guidance with it. I will attach images of the question ...
- 21
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28
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Measuring wire damage using strain gauges
We need to determine the physical damage in some area of overhead lines that can't be inspected visually. The damage's in general caused by short circuit and air pollution (mostly sulphur compound).
...
- 113
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44
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Measuring beats/bounce in a closed cubed glass
Suppose that we have a $2$ by $2$ by 2 $cm^3$ closed box, made up of glass, with thickness $0.1 cm$. Yes, it is a very small box. Let's say in that box there is a ball (also made with glass) with ...
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83
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How would I measure this battery circuit with a multimeter?
The wire is attached to the bottom of each D battery.
I already know that I have to put the bottom of the light bulb on the positive side of the battery.
My multimeter looks like this:
I'm not sure ...
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2
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403
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Weight Sensing Problem: Need to detect 10kg load down to milligram accuracy
I need to build some type of scale where one can place four 600mL beakers on it and measure out its weight down to a milligram level of accuracy. I'm doing this so I can dose a very small amount of ...
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4
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142
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How to detect whether a bus is in motion or not
I am a university student and I need some help in a project. For the past few years now, many accidents have occurred whereby in overcrowded buses, passengers are accidentally propelled from the back ...
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56
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Is there a 5% range CO sensor with a response rate higher than 1Hz?
I'm building a portable emission analyser which measures emissions from a tailpipe, to aid in troubleshooting and tuning an engine. For this, I need a $\text{CO}_{2}$ , a $\text{CO}$, and an $\text{O}...
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110
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Thermistor - Steinhart-Hart Coefficients
In order to identify Steinhart-Hart coefficients for a thermistor, three known temperatures may be used to find three resistances.
What is the best way to choose these temperatures to calibrate ...
- 25
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797
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Multi Ratio Current Transformers
I encountered a problem in measuring electrical energy using a multi ratio current transformer (CT). The catalogue of CTs is unavailable.
I have little information about the type of CT I am using. I ...
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3
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171
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Measuring the road surface quality
First of all, excuse my little knowledge, I'm a computer programmer by trade and unfortunately have very little knowledge of physics, engineering, DSP but I'm willing to learn.
I would like to ...
- 151