Questions tagged [microelectronics]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
1 answer
44 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?
user avatar
  • 33
0 votes
0 answers
25 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)...
user avatar
-1 votes
1 answer
65 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 ...
user avatar
-1 votes
1 answer
77 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 ...
user avatar
1 vote
0 answers
90 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-...
user avatar
0 votes
1 answer
49 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 ...
user avatar
2 votes
2 answers
456 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 ...
user avatar
  • 155
3 votes
1 answer
244 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 ...
user avatar
1 vote
0 answers
33 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 ...
user avatar
  • 111
0 votes
1 answer
60 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 ...
user avatar
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?
user avatar
2 votes
1 answer
144 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 ...
user avatar
1 vote
1 answer
70 views

Controller vs Micro controller?

What is the difference between both of these terms? Especially in configuration and application?
user avatar
  • 151
0 votes
2 answers
358 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?
user avatar
0 votes
1 answer
111 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 ...
user avatar
  • 101
0 votes
0 answers
32 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 ...
user avatar
  • 113
1 vote
0 answers
38 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 ...
user avatar
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 ...
user avatar
4 votes
1 answer
747 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 ...
user avatar
2 votes
3 answers
84 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 ...
user avatar
  • 21
1 vote
1 answer
45 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 ...
user avatar
1 vote
1 answer
77 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 ...
user avatar
  • 21
1 vote
3 answers
6k 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 ...
user avatar
  • 11