Questions tagged [hardware]

Computer hardware is the collection of physical elements that constitute a computer system

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3answers
134 views

Development board or Individual Microcontrollers? [closed]

I am an electrical engineering student and my planned career path is embedded systems. To get slightly ahead of my peers, but also for my own interests, I am learning embedded programming as well as ...
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1answer
56 views

Getting lower output voltage than expected in 5 level inverter

I am making a 5 level inverter using an Arduino Mega. I am using an IRFZ44N MOSFET for switching and also an MCT2E as a MOSFET driver. The problem I am facing is that I am a getting a lower output ...
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1answer
87 views

How does the hardware realize adding 8 values in 1 clock cycle? [closed]

For example: result= a1+a2+a3+a4+a5+a6+a7+a8 How many adders are needed to perform this in 1 clock cycle? What does the design look in terms of hardware?
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3answers
105 views

Has there been any deliberate implementation of combinational logic soft error correction in any consumer-level product, like a CPU/microcontroller? [closed]

Prologue It is well known that many error detection, mitigation, and correction methods, such as parity or ECC, have been available in large memory banks, like for RAM, for decades now, and even in ...
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0answers
41 views

How to set SPI clock speed for MT7623N

first I must say, I am new to the HW programming, but I really enjoy it. My first project is writing a library for MT7623N (BananaPi R2) that handles GPIO pins. I got the GPIO part done and I can set ...
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1answer
41 views

What spacing to use between microstrip trace and ground plane on same layer?

I am designing a 4 layer board (1 - signal, 2 - GND, 3 - power, 4 - signal) and I have some microstrip lines on top and bottom layers. Should I fill the top and bottom layer with ground? What do you ...
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1answer
57 views

Hardware for Generating Low Frequency Vibrations

I am interested in having a small device generate low frequency vibrations in the range of 1Hz - 10Hz which can be adjustable. Doing my research, I came across small coin shaped motors which are ideal ...
2
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1answer
29 views

KiCAD - Errors when designing shield schematic

I finally finished my first schematic and everything looked great. I went ahead to perform Electrical Rules Check. There were many errors. Most of them were: ...
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0answers
22 views

VHDL structural vs Behavioural implementation vs data flow

I was wondering what would be the benefits of structural vs behavioural vs data flow implementation of a code. I know behavioural is easy since its close to C++ and it doesn't have hardware concerns, ...
2
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1answer
85 views

Confused about the meaning of hardware specification

This question is not directly about design but meaning of a concept used in electronics design. Basically, I cannot find the clear explanation regarding the following use of "specification" ...
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0answers
57 views

How to sync time between two devices (<30m apart) with a sub milisecond accuracy? (think PTP)

So my task is to detect the source of banging in a metal tube (picture radiator pipe). The idea is to put two mics to the ends of the tube and measure time differences when they hear banging. The tube ...
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2answers
87 views

Is it safe to apply voltage to buffer output?

I want to design a SDI-12 interface and I am using this schematic as a starting point. In receive mode, the 5V SDI-12 data signal will reach UART RX via the transistor Q1, but will also reach the ...
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1answer
51 views

How to decide the DDR3 routing topology?

I am designing board which has got 4 DDR3 Die on it, 64 bit SDRAM interface. DDR3 Memory controller will be xilinx FPGA. I have some confusion in the signal routing from the DDR3 interface to DDR3 ...
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2answers
118 views

Why are most of the RESET signals in embedded systems active low?

I am hardware design engineer. I had seen lot of board designs since 2015. In my career I have seen that most of the RESET signals are of active low signals. Is there any logical reason behind that? ...
2
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1answer
224 views

Power a circuit with power supply and USB port, my solution

I want to power a circuit I have from a dedicated power supply. But at the same time, I have a USB port that can also supply power but only when I decide to upload new firmware to a atmega32u2. Here ...
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0answers
19 views

cjmcu-3221 i2c problem - doesn't show on search

I have big problem and strange problem with the device, I have connected it into Arduino VS - 3.3V GND - GND SCL - A5 SDA - A4 didn't connect anything to ch1-3 ...
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0answers
21 views

NC (non controllable) fault on primary input

I am using TestMAX (synopsys) to debug problems of coverage in DC (stuck @) simulations. I encountered a NC (non controllable) fault in the primary input, why do I get that? is that a bad fault or ...
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0answers
43 views

Would this silary battery shield work? [duplicate]

I am making an open source solar battery shield for the Arduino Uno, would this circuit work? It's pretty basic but I think it would do the trick. Also,the power from the solar cell will come into the ...
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1answer
16 views

how can i make compile stage shorter in VCS (synopsys) after logic changed?

if I changed few lines from a specific Verilog of design and now I want to recompile, can I compile just the related files or I need to compile the whole design again? i'm using VCS tool by Synopsys.
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0answers
24 views

Flyback converter Transformer calculation verification

Kindly verify the transformer design for this wide input power supply using LM5022 i am designing the power supply for my solar inverter in which output of solar panel (750Vdc to 800Vdc) directly fed ...
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0answers
24 views

Logic to pull signal low on power loss until signals next rising edge

I have the circuit below using the MCP23018 I/O controller which is always powered. The issue I'm having is that the signal USBC_RST_N controls the reset line of a PCIE-USB IC which has the ability to ...
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0answers
125 views

N-Channel MOSFET Circuit

a friend of mine developed this Schematic and Circuit. The Problem is, on LIN_BUS (please ignore the Name) should be KL15 Volage (13.8V) if the FET switches. But if FET1_CNTRL is LOW (0.0V) the ...
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2answers
71 views

Decoupling of STM32F072CBT6

just a short question while reading the Datasheet. What is the meaning of the Capacitors in the second line (marked red). Do I need both (100nF AND 4.7uF) connected each of the Supply? Datasheet Link
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0answers
52 views

EMC tests requirements

I have designed many boards since graduation in my position as Hardware Engineer, but none of these boards tested its electromagnetic compatibility with the standards. However in all my designs I have ...
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1answer
74 views

Hardware that can generate chirp audio signal

Basically I would like to generate chirp audio signal that sweeps from 16 kHz to 18 kHz, the signal lasts about 100 ms, no restrict requirements on the sound volume. I am able to generate such chirp ...
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4answers
418 views

Polarised capacitor vs. unpolarised capacitor. Which to use when?

Polarised capacitor has polarity (+ and -). Is it also called electrolytic capacitor? (Question 1) Unpolarised capacitor does not have polarity (there is no + and -). Unpolarised capacitor can be ...
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5answers
117 views

What does 32 mean in QFN 32? Term is related to IC chip specification

ESP8285 IC QFN32 is a chip. https://robu.in/product/esp8285-ic-qfn32-original/ What does 32 mean in QFN 32? If I have a part/ footprint having the name as QFN50P500X500X90-33N-D. Will it be different ...
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1answer
92 views

PCB designing of GSM module

I want to design PCB of a GSM module. Inside a GSM module there is a place to put a (mobile cellular ) SIM card. And then this GSM module can send SMS text messages to different phone numbers. ...
2
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2answers
69 views

How to appropriately test Ethernet hardware?

How should I appropriately test the Ethernet of my device? I have some ideas: Measure signal integrity between the MCU and the PHY or Switch devices (like RMII) Measure the signal integrity of the ...
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5answers
13k views

When Intel / AMD choose their Nanometer Processes, why were the specific numbers, 5, 7, 10, 14, 22, 32, 45, etc chosen?

When looking at the roadmaps for the CPU manufacturing process https://wccftech.com/intel-expects-launch-10nm-2017/ 10 µm – 1971 6 µm – 1974 3 µm – 1977 1.5 µm – 1981 1 µm – 1984 800 nm – 1987 600 nm ...
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1answer
74 views

Need help identifying components! Hardware

So recently I have come across a schematic diagram with pictures, but some of the parts in the build (A quadruped robot, more information in the hackaday link below) are not in the schematic, and I ...
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2answers
106 views

SOP vs SOIC test clips [closed]

I'm mostly a software person, so this might be a super basic question. I wanna connect to an SOP8 flash chip. I see many recommendations for the Pomona clips, but that one is labeled SOIC8. I can't ...
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1answer
80 views

How to adjust trim potentiometer

I bought some DC-DC buck converters which are supposedly adjustable. They have a tiny trim potentiometer on them, but how are those adjusted? I tried my tinyest screwdriver, but it simply won't turn. ...
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1answer
85 views

Meaning of certain symbols and labels in Circuit board PCB schematic design (v2)

I have a schematic design for a printed/ electronic circuit board. I want to know the meaning of certain symbols/ labels in the schematic design. I have highlighted in the below picture, the relevant ...
2
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4answers
322 views

Hardware to run a fixed neural network

Suppose I have a feedforward neural network and I already have decided what its directed graph, weights and activation function should be. I want a device than runs this neural network as quickly as ...
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3answers
7k views

Meaning of certain symbols and labels in Circuit board PCB

I have a schematic of an electronic circuit board or PCB. I want to know the meaning of certain symbols and labels in the diagram. I have highlighted the diagram below with green, yellow and grey ...
2
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0answers
82 views

ATX power supply doesn't cut the current after being turned off

I made a power supply for my electronic projects using a ATX power supply of a older computer and used a button connecting the black and green wires to turn it on/off. I noticed that sometimes when I ...
2
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3answers
183 views

getting interrupt from ignition circuit

This transistor ignition circuit for a model petrol engine is built from a proprietary kit. I have made it up and it works. Now I want to take a signal from it as an external interrupt to an Arduino ...
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0answers
44 views

microSD card voltage level- reverse engineering design

Goal: Adding (back) a microSD socket to a camera that does not have one. The microSD pads are laid out and appear to be fully connected. Ground is to the ground plane, the data lines are with ...
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3answers
79 views

Making complex boolean circuits that give true as output only for a specific combination of boolean inputs

This is my first question on a stack exchange website so please bear with me. I am making challenges for a jeopardy style capture the flag event in my college and I had come across the minetest ...
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0answers
30 views

Development kit for learning USB device driver development

I want to learn writing device drivers for USB devices (on linux kernel or microcontrollers, if that matters). Hence, I am looking for sample USB development kit. e.g. when I wanted to learn I2C, I ...
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2answers
49 views

What board should I use to control my 3D printer

I'm trying to build a simple experimental FDM 3D printer as a hobby. As I said it's a simple printer with only basic functionalities such as receiving the slicer file to print from a slicer software ...
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1answer
94 views

How to find RPM from the square wave of a MSD box

I am trying to make a tachometer for my car. I am using a MSD6Al-2. The box outputs a 12 volt square wave at a 20 % duty cycle I talked to someone at MSD and they said you'll get a signal every time ...
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1answer
35 views

Can I use WP(Write Protect) pin of a USB flash memory controller to prevent tampering with its firmware/stored data?

I want to have an USB stick that I can make it read-only and insert it in any untrusted PC without risking a silent BadUSB infection. I was thinking about finding an USB stick that has this WP pin in ...
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2answers
80 views

ESP8266 / ESP32 - Health issues

I am doing a pretty specific project, where I plan to connect up to 150 devices, mostly depending on ESP32 and a few ESP8266 devices. All of them will be located in a tiny space of around 5-8 square ...
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2answers
72 views

How Serial Port Loopback Test work internally/underneath? [closed]

Actually I've asked my question on StackOverflow, but I really think it belongs here. Here it is anyway: When doing a Serial Loopback Test on a USB Port (assume COM1) using Hyperterminal or any other ...
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6answers
1k views

How do computers output a signal without an input? [closed]

I'm curious about how an output pin gets turned on at a low level when there is no input like pressing a button to complete a circuit. If you program a raspberry pi to turn on and off an LED how does ...
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1answer
37 views

Can a micro operation pass multiple pipeline stages with a single clock cycle?

I'm learning a CPU architecture and currently found some high-level description of Intel x86_64 CPUs architecture. By the high level description I mean something like the following micro-op flow (...
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9answers
13k views

Which method or component is best to regulate 42 to 3.3 V?

I am using a 36 V battey pack (10s 2.5 A each cell 3.6V.) Its maximum voltage is 42 V. I am using a STM32 microcontroller whose input is 3.3 V. I am designing a PCB in which the power supply is drawn ...
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0answers
54 views

Connect DC/DC Conv Isolated Ground

I'm developing a modular equipment device aimed for industry, very similar to a PLC in terms of electronics. For all field interfaces I am using isolators and ESD protection for robustness and to pass ...

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