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Engineering Stack Exchange

Questions tagged [microelectronics]

27 questions
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3 answers

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 cellphone ( At that moment, the maximum storage on the market was 32 MB, marketed as the "breakthrough in high-capacity" cards). However, as everything, those…
T.Todua
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4
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1 answer

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 transmitting the chosen song on my custom MP3 player to…
Trever Wagenhals
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3
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3 answers

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 cannot exceed that limit. Now, I'm unable to get…
Vertinhol
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3
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1 answer

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 tweeter) for better quality for frequencies between…
Richard Bernard
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1 answer

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 available for this task?
ISURU THIWANKA
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2
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3 answers

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 photolithography. Why resolution of photolithography…
rfcdgt
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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 are connected to the arms of the Hall bar with…
NeonGabu
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2 answers

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?
ISURU THIWANKA
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1 answer

Controller vs Micro controller?

What is the difference between both of these terms? Especially in configuration and application?
engr
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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 be needing resistors so the ICs don't burn but I am…
John Michael Garcia
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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 have enough pixels and, considering the…
Marco Souza
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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 it I2C debugger showing wrong data as reading…
user7390491
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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 FPGA has a pool of logic gates and flip-flips, and…
Frank
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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 field becomes dangerous? Also, what are the ways…
wkv
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