Questions tagged [microelectronics]
The microelectronics tag has no usage guidance.
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Why are mounting hole locations for many Arduino and Nucleo boards so strange?
The mounting hole positions are so simple in case of the Raspberry Pi 4 for example:
But on the Arduino Mega, you see this odd constellation:
And on the Arduino Uno R3, they are placed very ...
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How to create a handle for the PCA9554 io_expander when using it with esp32-S3 on Adafruit Qualia board?
I'm using the Adafruit Qualia board with ESP32-S3. The board uses the PCA9554 io_expander to provide the SPI interface for a 40 pin LCD display (which uses the ST7701 driver). Board schematics which ...
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How do I predict electrical mean free path in nanostructures
How does one roughly predict the mean free path for electrical conduction in a nanostructure at different temperatures and under different electrical conditions such as different voltages and ...
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calculating drain current
I am doing a practice question where I'm supposed to find a drain current for a figure, shown in the light blue box in the picture below (along with my calculations).
The red writing is the equation I'...
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Failed in upload firmware to esp32
I'm having an issue when uploading code to my ESP32. Previously, I had configured the partition scheme to 'minimal,' and I was able to upload code without any problems. However, after I fixed my ...
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CMOS AC-to-DC Converter Design
I am trying to analytically model the power conversion efficiency of an AC-to-DC power converter circuit (see Figure 1). In this design, the drain-source voltage of each MOS device can be expressed as ...
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Can a variable be locked at hardware level?
I changed out of curiosity the max speed variable of my car ECU from 250Km/h to 60Km/h to see if the car reach that speed and hold there or I can go beyond and get a warning but it turns out that I ...
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How to build and power very large scale addressable LEDs?
A 2 part question. I've built large scale LED projects in the past, but for the next one it would be massive (a black hole disc with a diameter of 54 ft), and addressable LEDs on the top and bottom. ...
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Second small surface one integrated CPU
I was changing the thermal paste of my CPU and I noticed, there where two metallic surfaces but only one was covered with thermal paste. The heatsink-plate is big enough to cover both surfaces, though....
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How to know which opto-coupler is suitable for high current application?
I would like a suitable opto-coupler to use as isolation from a 12V and around 30A current and another for 5V and around 30A. Are there any good opto-couplers for those ratings?
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Voltage drop on amplifier signal after LED switches on
Circuit above shows my design for amplifying PIR sensor signal, which I then feed to Arduino and based off this signal I switch a LED on.
Both, the LED and PIR sensor, are on the same voltage rail (9V)...
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Battery size and maximal power output [closed]
Generally how does the size of the battery affect its maximal power output(together with other factors like materials, for instance)?
Under the current engineering technology and with any possible ...
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What is the maximum distance for eavesdropping? [closed]
There is a closed question
https://physics.stackexchange.com/questions/276667/what-is-the-maximum-distance-for-eavesdropping-sound-waves
on Physics Stack Exchange and I thought this might fit better ...
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Devices powered and charged via electricity generated by human body
I came across articles like:
https://www.sciencedaily.com/releases/2021/02/210210142049.htm
https://pubmed.ncbi.nlm.nih.gov/27836601
and
https://www.dailymail.co.uk/sciencetech/article-2004801/Weve-...
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Can internal heat reduce significantly a laptop's lifespan?
Some days ago I had an heated debate (pun not intended) with a friend regarding the use of my laptops.
Basically he says which I'm slowly killing them by using them for computing intensive tasks which ...
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