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Questions tagged [hardware]

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

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Ways to Design Automotive Sensors from scratch? [closed]

I have joined a Automotive Sensor Development Team. Can anyone explain me the ways to design and develope a automotive sensor from scratch to finish. Eg.: HV Current Sensor.
user131517's user avatar
0 votes
1 answer
62 views

How to use a Raspberry Pi to discharge a high voltage capacitor

I'm trying to use a piezo element as a tactile feedback actuator. I've successfully managed to use it with 10 * 9V batteries in series which had an output of 90 volts. However, I'd like to test it in ...
Michael Efraimidis's user avatar
1 vote
0 answers
76 views

FTDI chip not working properly [closed]

I recently purchased an FTDI chip from AliExpress. However, every time I try to use it on Linux via the picocom command, it gives me a lot of unknown characters. I ...
Code Sir's user avatar
0 votes
1 answer
78 views

How do I design a USB interface to program a custom microcontroller?

I am trying to design a microcontroller board that I can program over USB (like an Arduino). I would like to use the STM32L412KBU3, and going through the data sheet I see that USB_DM and USB_DP are on ...
Lane Womack's user avatar
0 votes
1 answer
40 views

Opamp Alternative Choice

In this study, this diagram was created for the preamplifier design. Is the LT1001 a correct match for the opamp? For the diagram above, I think pins 1 and 8 are Vos trim(white,pinB), pin 5 is NC(...
Ahmet Enes YILDIRIM's user avatar
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0 answers
16 views

Are LTE-M or NB IoT Sim modules (eg from simcom) carriers restricted?

I am currently planning to build a board which will have to use LTE-M or NB-IoT technology due to their low consumption and because I do not need large data bandwidth. The targeted region is Africa. I ...
HGO's user avatar
  • 21
1 vote
1 answer
72 views

Why is this 8051 ASM code not working?

I’m trying to implement an automated parking lot using an 8051. I’m using stepper motors to function as gates at the entrance and the exit of the parking lot that open whenever the IR sensors placed ...
Captdeadpool's user avatar
0 votes
0 answers
28 views

Same hierarchical block for different power supplies in Altium Designer

I need to repeat one circuit in my design but connecting it to different power supplies. Because it is a repetition (iteration) I have decided to use a hierarchical block and copy it 3 times. The ...
Developing Electronics's user avatar
0 votes
3 answers
191 views

Why can't software capture PCIE packets?

I found this question in Stackoverflow and the answers say: I don't believe so -- from a software viewpoint, PCI-E is quite well disguised to look like (fast) PCI. As far as I know, nearly the only ...
user1783484's user avatar
1 vote
1 answer
66 views

Do I need to glue connectors to my debug board, so they don't come off?

I designed a debug card for the Virtex 7 FPGA VC707 Evaluation Kit My card has two large connectors Vita 57.1 (FMC-HPC). Each with 400 BGA pads. I was wondering, if I shoulod use any glue to keep the ...
johnny_1010's user avatar
2 votes
1 answer
89 views

How to add colorful logo to PCB in Altium Designer?

I was going through Twitter, and I found this PCB I want to know how they add the colorful logo to it and it can be done in Altium Designer.
Monesh Rathod's user avatar
2 votes
2 answers
255 views

Improving Analog Input Readings into an Arduino - Circuit Design

I am designing a SMPS (see previous question if curious) and need to provide the mcu with an output feedback voltage to dial in the duty cycle for closed loop control. Using an Arduino (Leonardo in ...
Vadim Belogorodsky's user avatar
0 votes
1 answer
276 views

Utilizing Multiple USB 3.0 Ports for USB-C DisplayPort Alt Mode

I'm currently exploring the possibility of leveraging multiple USB 3.0 ports to collectively emulate USB-C DisplayPort Alt Mode for connecting an external monitor. Is it technically feasible to ...
Lewis Trem's user avatar
0 votes
1 answer
91 views

I need to keep pressing EN on ESP32 custom board after restoring power so it can work

I've noticed that whenever i unplug the power supply on my board and plug it again, i need to press the EN button so it can start working again, knowing that i've tried 100nF, 2,2uF and 10uF on C4 ...
walid Bmd's user avatar
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0 answers
96 views

How is the address line A20 enabled in modern hardware?

In the olden times, the memory address line 20 (A20) of the 80286 and others was automatically masked by the IBM AT motherboard. It could be enabled using the keyboard controller. Then the 80486 ...
Schilive's user avatar
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0 answers
52 views

Intrinsic safety connection protection between two intrinsic safety devices inside a hazardous zone

I am designing an RF module in in a hazardous zone (in the picture it is shown with DCDC and MCU etc.) My module gets power supply from AC/DC. I read about intrinsic safety barriers from the IEC 60079-...
Kostas Severus's user avatar
0 votes
2 answers
60 views

SPI protocol master CS pulled low

If I run the system on SPI protocol and keep the master slave connected with it, will communication happen if I disconnect both the CS pins master and slave and tie them to ground?
S M Kalim Ahmed's user avatar
3 votes
5 answers
939 views

How can I calculate a relay's series resistor?

I have been told that always when I add a relay to my design I have to include a series resistor (series with the coil) to limit current in it. So, I want to use a 5 V DC (coil) relay. How do I ...
Developing Electronics's user avatar
0 votes
0 answers
134 views

Problem with Max 485 RS485 to TTL chip (Not Receiving Data)

I am working on a project connecting Arduino UNO r3 and an RS485 modbus master with MAX485. The connections are shown below. ...
SotEft's user avatar
  • 1
1 vote
2 answers
279 views

Can you deliberately damage RAM using pointers?

Can one deliberately cause physical damage to RAM using C++ and its implementation of pointers? What about segmentation faults? Can they cause any damage? Example: trying to access a non-existent ...
ben's user avatar
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1 vote
0 answers
44 views

Where I'm wrong when importing From Arduino sketch into Atmel Studio 7, (about DHT11)

Atmega 328p is tested on a breadboard with LCD1602 and DHT11. I am programming this with SNAP MPLAB via Atmel Studio. On Arduino Uno everything is fine, but on the breadboard, DHT11 not responding. ...
zp60's user avatar
  • 11
3 votes
5 answers
780 views

Low consumption resistor pair

I'm working on a project that measures battery voltage. The device, I designed, works on coin cell. I have to extend battery life, that's why I used the following design But it requires two pins ...
inventionClass's user avatar
2 votes
0 answers
106 views

S11108 Circuit Design Logic

This is my first post and also my first dip into electrical engineering, and I wanted to ask if you have any suggestions on the circuit I have designed. As a background, I'm a Computer Science student,...
Alex Riddell's user avatar
2 votes
7 answers
242 views

Two sets of resistors with one switch

My goal is to switch between two sets of five restistors. The goal was to use one switch to change the sets. By pushing one of the five switch the specific resistor of the set is connected between ...
Duchoud Nicolas's user avatar
4 votes
2 answers
216 views

Electrical characteristics on datasheet

What does this part of a datasheet mean? I always get confused when studying them... Is the user suppose to meet these conditions before getting the results stated on the sheet?
imran muhd's user avatar
0 votes
0 answers
67 views

How do you calculate the leakage current for the I2C interface in the active and sleep states?

How do you calculate the leakage current and power loss for the I2C interface in the active and sleep states? Consider that the I2C operates at the maximum data rate of 1 MHz (Fast mode plus), with a ...
Ananthesh's user avatar
  • 285
1 vote
0 answers
252 views

Reset circuit with delay

While my background is EE, I've mostly worked as a firmware person. I'm designing a product that should reset about 5 seconds after being placed onto a charger. The delay is to allow time for data to ...
Jonathan's user avatar
1 vote
0 answers
92 views

Does my ORing or Ideal diode Work or not?

Does anyone have experience with parallel switching of power supplies like I do here seen depicted in the schematics below. I have designed and simulated an ORing or ideal diode based on simple ...
wogoos's user avatar
  • 71
0 votes
1 answer
36 views

How do you choose the right load for reliability testing?

I am an automotive reliability and test engineer. I do environmental or electrical tests and during these tests I need to load my products. By load I mean, for example, there is a mosfet driven by a ...
Taha Füzün's user avatar
0 votes
2 answers
117 views

DRAM Memory : How is data stored from the HDD to DRAM? [closed]

When storing data from HDD to DRAM, is one large data block (e.g., 8 bytes) stored in one chip? Or is it distributed among multiple chips in a DIMM? If it is distributed, how many bytes of consecutive ...
C.Ky's user avatar
  • 3
0 votes
2 answers
168 views

Minimize Single Balanced Mixer Insertion Loss

I am self teaching RF via the internet, "Introduction to Radio Frequency Design" by Wes Hayward and the 2005 ARRL handbook. My intended project is a 1 stage IF heterodyne receiver. Not ...
Yousif Alniemi's user avatar
0 votes
1 answer
33 views

Turbocharger Electronic Valve Control

I have seen that the H bridge method is used to drive the valves required to use the turbocharger feature in the engines, why do they prefer this? There is no DC motor, they open and close an ...
Eng's user avatar
  • 1
0 votes
0 answers
140 views

Single Photon Detection Using an FPGA

I am an undergraduate student working on a summer project involving single photon detection and coincidence counting. The main issue with the project is that the voltage threshold preset into the ...
portlandia2021's user avatar
0 votes
0 answers
67 views

Level shifting 2.4V to 3.3V

What design can I follow to make a level shifter? I have used SN75LBC. Its RE/DE has an output of 2-2.4V and I want it to connect to the receive pin of my ESP. The ESP WROOM-02 operates at 3.3V so I ...
yessi's user avatar
  • 11
2 votes
3 answers
708 views

Purpose of dual diode

I'm referring the DALI 2 schematics by Mikroe. Within the circuit what is the function of D1 in given schematics? And why they are using a dual diode?
Alex 's user avatar
  • 23
3 votes
2 answers
420 views

How does CPU's Machine Check Architecture work?

Modern CPUs can alert the OS when itself is malfunctioning, i.e. logically incorrect, and apparently, this is supported by a hardware diagnostic feature called Machine Check Architecture. I can ...
Meatball Princess's user avatar
0 votes
0 answers
34 views

STM32 USB Dongle ST-utility connection problem

I'm using a CANADUINO ST-Link V2 USB Dongle (SWD). I'm trying to connect to the chip but I keep getting this error: I do have the reset pin attached to the USB. Any help is appreciated.
Chris Walker's user avatar
0 votes
1 answer
114 views

On an embedded system, when you have a hardware interrupt, what happens to the process status word?

I have been taught that when an interrupt arrives, the following generally happens: The current instruction finishes. The interrupt is acknowledged. The hardware state(PSW) is stored . The PC is ...
Thomas Stokes's user avatar
0 votes
0 answers
52 views

Using ISL9241 Buck-Boost Battery Charger for an AMD Motherboard (Without an EC)

I want to use ISL9241 Buck-Boost Battery Charger for a system that has AMD Ryzen™ 9 PRO 6950HS APU. I saw that also in AMD reference design and Intel Tiger Lake UP3 reference design, ISL9241 was used ...
Firas Abd El Gani's user avatar
0 votes
0 answers
54 views

Using 2.4 GHz microwaves to demonstrate optical polarization

Several educational companies sell kits to demonstrate optical polarization using 3 cm (10 GHz) microwaves emitted from a Gunn diode transmitter and simple grid-like polarizers. My question is whether ...
daniel's user avatar
  • 145
1 vote
1 answer
83 views

Two action switch on circuit

Trying to fix my electronic lawn mower and I have a switch in it that is quite interesting. You need two actions. One is the engage the lever normally it is horizontally across the switch body when ...
Bob R's user avatar
  • 263
0 votes
1 answer
76 views

What is the transfer function of electroabsorption modulators?

Can anyone give me a reference that I may find a closed-form formula for the output electric field (not power) in terms of the input small-signal electrical waveform (not input power) of an ...
CLAUDE's user avatar
  • 448
4 votes
1 answer
265 views

What are the possible implementations of LUT on silicon?

I'm looking for the possible ways to implement a LUT. The only way I know is to use Flip Flops to store the outputs and a MUX to select the output using the input as a select signal. Is there any ...
Hmdee's user avatar
  • 51
1 vote
1 answer
63 views

What would the markings above these pads mean? Trying to hack this watch

Here is an image of the watch: (Original) Here is an image of the pads in question: (Original) I am not very knowledgeable about hardware as I come from a software background. Could anyone lead me ...
ConnerWithAnE's user avatar
3 votes
1 answer
332 views

Issue in rail to rail opamp as buffer

I'm using LTC6090IS8E#PBF as buffer. Following is the circuit. Actually my input is 100 V and I'm attenuating it to 60 V using voltage divider. Then 60 V is given to non-inverting input of LTC6090IS8E#...
Brt's user avatar
  • 65
2 votes
1 answer
143 views

Residue voltage due to gate driver leakage current

I want to reduce the leakage current of a gate driver driving an IGBT as I have some residual voltage on the high voltage line LV for communication is on. The residual voltage on the high voltage line ...
Alison's user avatar
  • 347
1 vote
1 answer
139 views

How does DDR SDRAM increase the bandwidth without increasing the frequency at which a memory array operates?

I am reading about SDRAM, and how the bandwidth was increased with DDR optimizations. From my understanding DDR can send data at a rising and falling edge, effectively doubling the data being sent. ...
Diogo Landau's user avatar
1 vote
1 answer
149 views

HDMI to LCD RGB888 decoder IC [closed]

I'm working on the "Allwinner H3" core board in my project and I want to connect an LCD to it but it has only HDMI output and I have to use an HDMI to LCD RGB888 decoder IC, so I decide to ...
Emad92472's user avatar
0 votes
1 answer
183 views

Newly purchased DS1302 IC not working

I want to add a RTC in my own custom PCB using a DS1302 IC. I am using the Arduino IDE and an ESP32 controller. I made a PCB and tried to run it but it failed to read data from the RTC. Just to make ...
dharmikP's user avatar
  • 525
2 votes
2 answers
371 views

Custom RP2040 board detection and uploading issues

I have designed and tested a custom RP2040 board for simple GPIO ON/OFF functioning and everything worked just fine. Now, we have ordered 30 more of the same circuits (with same design and components)....
Samiksha's user avatar

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