Questions tagged [electrical-engineering]
Study and applications of electricity, electronics, and electromagnetism. Use this tag when someone who has trained as an electrical engineer is likely to be able to answer your question.
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Can I use a ultrasound sensor to measure water level?
If I use an ultrasonic sensor will it detect the water level?
I was thinking about a product to read water level on water boxes (common in Brazil). I researched about instrumentation for this ...
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Calculating pitch, yaw, and roll from mag, acc, and gyro data
I have an Arduino board with a 9 degree of freedom sensor, from which I must determine the pitch, yaw, and roll of the board.
Here is an example of one set of data from the 9-DOF sensor:
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Thermoelectric Technology to Harvest Energy from Internal Combustions Engines
Background:
In an automobile, only 1/3 of the potential energy in the fuel is converted into mechanical energy and significant portion of the energy is lost as heat.
There have been previous ...
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Harvesting thermoelectric energy from computer graphics cards
During CES2015 a well know Graphic Processor Unit (GPU) manufacturer introduced a new GPU. These GPUs need complex thermal management to keep the processor cool. Most GPU accelerator card ...
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What is Radial and Thickness Mode Vibration in a Piezo Electric Ceramic Disc Transducer?
I am trying to use a Piezo Electric Ceramic Disc Transducer for ultrasonic sensing measurements for fluid levels. A Piezo Ceramic Disc with a Resonant frequency of 215 KHz or 1 MHz is under ...
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How can the vendor be approved/disapproved based on validation test data?
The power requirement for a sub system is 5V +/- 10% @ 1A of current. A RFQ was issued and a prospect vendor was selected. A first article of inspection (FAIR) has been submitted which includes 15 ...
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How to identify low quality electronic components early?
Our component sourcing organization purchases large amount of electronic components from suppliers. I believe this is through a bid process. Engineering provides the sourcing organization ...
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Determining the transfer function of cruise control given characteristic equations
During my time revising for my control engineering module, i've come across this question
The automatic cruise speed control for a vehicle is described by the following equations
$\bigl( 1\bigl)$ $...
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Why doesn't a lightning strike destroy the lightning rod?
Lightning strikes have been known to cause massive amounts of damage. The stats on a lightning bolt are:
current levels sometimes in excess of 400 kA, temperatures to 50,000 degrees F., and speeds ...
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Quantifying inertia on the electricity grid
A lot of discussion about the modernisation of electricity systems is about "inertia". This is usually a qualitative discussion about how turbines (in hydro, coal & gas plants) with lots of ...
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Is interference between aircraft an issue for fly-by-wireless technology?
I was reading up on fly-by-wire development, and I saw a short section about fly-by-wireless technology. It seems like a great idea, with the potential to lower costs, weight and complexity. I can see ...
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Having three heaters on single PCB
I posted this question on electronics SE, but was suggested that I post it here.
I basically having three heaters (serpentine pattern) on a PCB (fiberglass board), as the following image shows:
The ...
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How to reduce Engineering Bill of Material Cost for electronics products?
What is an effective method to re-engineer a current product to reduce engineering bill of material (EBOM) cost?
This is a continues improvement project for a current product in electronics space. ...
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Technical Analysis to determine optimal Cellular to transmitter location
At a very high level what are required technical analysis to
determine the need to for a new 4G LTE cellular transmitter in US?
find find the optimal location for the transmitter in US?
Back Story: ...
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How were the sequence of bar widths assigned to digits 0-9 for UPC barcodes?
UPC barcodes are comprised of a series of black and white bars. Bars can range in width from 1 to 4 (1 being the thinnest and 4 being the thickest). Each digit, 0 through 9 is encoded using exactly 4 ...
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