Questions tagged [microelectronics]
The microelectronics tag has no usage guidance.
28
questions
0
votes
0
answers
14
views
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 ...
0
votes
0
answers
14
views
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 ...
- 1
3
votes
3
answers
86
views
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 ...
- 131
0
votes
1
answer
49
views
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. ...
- 113
0
votes
0
answers
40
views
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....
0
votes
1
answer
88
views
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?
- 33
0
votes
0
answers
31
views
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)...
- 1
-1
votes
1
answer
72
views
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 ...
-1
votes
1
answer
81
views
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 ...
1
vote
0
answers
95
views
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-...
0
votes
1
answer
58
views
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 ...
- 101
4
votes
3
answers
1k
views
What is theoretical (physical) limit a MicroSD card's capacity?
There was time (a decade ago) when I got 8 MB (yes, 8 MB, not 8 GB) SD card for my Nokia ...
- 175
3
votes
1
answer
453
views
Arduino DAC to Speaker
I'm working with an Arduino Due's two DAC pins.
I want to output to a single 4W 5.7Ohm speaker to test my code, with the intent of eventually outputting to a set of speakers (woofer, mid-range, and ...
1
vote
0
answers
59
views
How to establish good ohmic contacts between Gold electrodes and Germanium Hall bar?
I am trying to get good ohmic contacts at low temperatures (4K) for a SiGe/Ge/SiGe quantum well Hall bar and so far this has been very challenging to me.
The electrodes are made with Gold and these ...
- 111
0
votes
1
answer
71
views
How to connect Arduino to brushless motor through only 1 digital pin
I know how to connect motor to Arduino with 3 wires: 5v, digital pin and ground. As I know only digital wire need to control "speed control" of my motor. So, if my Arduino connected to computer and it ...
- 11
1
vote
2
answers
61
views
Electronic component datasheet handling
What is $V_{IH}$ and $V_{IL}$ in datasheets? I found High-level input voltage and Low-level input voltage on the datasheet?
2
votes
1
answer
179
views
How to drive 12V servo motors using 5V PWM or 3.3V PWM using ARM MCU?
I have to drive several 12V servo motors. So I wanna to get 12V PWM Controller (12V Logic Controller). I have MCU as Atmel SAM3X8E arduino due board. It has 5V PWM outs. Is there any Controller IC ...
1
vote
1
answer
79
views
Controller vs Micro controller?
What is the difference between both of these terms? Especially in configuration and application?
- 263
0
votes
2
answers
726
views
What kind of mechanism can be used to rotate a part in 180 degrees (Ψ (yaw)) and 30degrees in 𝜃 (pitch) direction?
Let's say we have a flat object. We are asked to create some mechanism so that the part can rotate in the shown angles above. What mechanisms can be used?
- 11
0
votes
1
answer
151
views
Hover Stylus for capacitive touchscreen
Capacitive touchscreens do not rely on touch as the name suggests but rather measure the distortion of the electrostatic field. To my understanding a touchscreen might be able depending on the build ...
- 101
0
votes
0
answers
35
views
Name of protocol used to communicate with Fuelling Station Dispensors
I am trying to figure out the actual (Range of ) communication protocols used to communicate with Fuel Dispensers at fuel retail outlets.
I see them write 2-wire protocol which is not specific as ...
- 113
1
vote
0
answers
39
views
How do I make sure I don't damage electrical components (L293D, RaspberryPi, & DC Motors)?
I have a RaspberryPi that will control 4 DC motors. I will be using 2 L293d ICs. The 2 ICs will be powered by a 24v 5A Power Adapter.
Question: What other components do I need?
I imagine I would ...
1
vote
1
answer
40
views
How to use consumer electronics for industrial application on high temperature
I need to measure the width of a bar made out of glowing red steel (900-1200 degrees Celsius) using computer vision.
In order to ensure resolution of a 0.5 millimeters/px, the camera is needed to ...
- 31
4
votes
1
answer
1k
views
Making my microcontroller transmit audio to any bluetooth headphones/speakers
I am creating a microcontroller on a custom PCB design for an MP3 player. I would like to consider integrating bluetooth into it. When I say integrating bluetooth into it, I specifically mean ...
- 141
2
votes
3
answers
86
views
Why resolution of photolithography evolved gradually?
Moore's law states that no of transistors on a given area doubles every 18 months. Electronic components are typically made by photolithography. So, Moores law basically limits the resolution of ...
- 21
1
vote
1
answer
46
views
RTC interface with PIC16F877A
I am newbie to embedded programming. My problem is I can write and read data to ds1307(by saying using I2C debugger). But my received data on LCD showing 0xE1 constantly for every changing second. Is ...
- 11
1
vote
1
answer
78
views
Can different analog and mixed signal devices be combined on a single chip
Say I want N-ADCs, M-amplifiers, K-filters, and why not, an oscillator too. Is there a platform to combine whatever device i need, and that this platform is implemented on a single chip?
I know an ...
- 21
1
vote
3
answers
8k
views
Effect of magnetic field on electronic components
Are electronic components like diodes,transistors, micro-controllers, microprocessors, wireless transceivers etc are damaged by strong static or dynamic magnetic fields? If yes, at what strength the ...
- 11