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Questions tagged [pc]

PC stands for a personal computer. It is a general-purpose computer whose size, capabilities and original sale price make it useful for individuals

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2answers
61 views

Speakers make humming sound [closed]

I don't know if this is the correct forum to ask this, but I have a problem with my audio set up. The setup goes as follows: PC -> external audio card (via usb from pc) -> stereo equalizer mixer (via ...
0
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2answers
76 views

PC power supply charge 12v battery

Two part question. If I take the 11v and 5v, with diode to prevent 11v to flow to the 5v, will I get 16 volts? And will it change a 12v battery? Last how can prevent overcharge? Also this is an ...
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1answer
65 views

Can you determine RGB pinouts with a multi meter?

I have a Swiftech Apogee XL2 that has an addressable LED inside it. I want to connect it to my other RGB setups but I need to know the pin signals and voltage of the LED. I have a multi-meter at the ...
0
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1answer
60 views

Creating a Bluetooth input device for PC

I am currently working on a customized input device. Since the Bluetooth connection from the controller to the PC is not as easy as I thought at first, I decided to use a controller which already ...
0
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2answers
167 views

VGA cable arcing against computer case

I've tried to turn on my old PC with my old LCD monitor, which is powered by a kettle cable directly from mains, no power supply brick). When trying to get it to work, I have noticed the following ...
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2answers
485 views

PC Headset crosstalk

I had issues with crosstalk (microphone picking up headphones sounds) and thought it was caused by headset. So I removed headset's original cable, put 4 pole female 3.5mm jack on the headset and ...
0
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1answer
103 views

Powering 64 SATA HDD from Single ATX Power Supply

I am planning to wire a 4U DIY JBOD top loader. Looking at the power output of several power supplies they have a a maximum rated 5v rail of 100-125w. By looking at the spec sheet of my chosen HDD I'...
0
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1answer
296 views

Conformal Coating PC Parts?

I couldn't find any topics relating specifically to this sort of thing, and even tried asking folks over on Reddit at /r/buildapc, but I didn't get many responses or many people know if it would be ...
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1answer
239 views

How to connect a PNP inductive proximity sensor to a PC? [closed]

I have a PNP metal proximity sensor. I am using it to test a door lock mechanism. I need a way to connect this sensor to a PC and make a user interface to show me the signals and the values. I haven'...
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0answers
39 views

Powering PC from motor generator

Commonly there are basic motor generator sets (with or without automatic throttle to compensate for load variations) and then there are those with an inverter to produce a cleaner sine wave using ...
0
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2answers
182 views

Is it possible to measure and log temperature using a microphone port of PC?

Instead of using an expensive logger, I'd like to measure and log temperature using a PC microphone port. I'm going to use TMP36 Temperature Sensor. The output voltage of the sensor is measured by ...
0
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1answer
242 views

Wiring RGB Vandal Switch as PC Power Button

I'm trying to wire up a Schurter CPS16 capacitive, multicolour (RGB), anti-vandal switch to my PC for use as a power button. The switch function is momentary and normally-open. Tech Sheet I'm just ...
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0answers
77 views

Can I use PCI-E slot for a non-PCI-E card?

I would like to design a card board for PC. I want to monitor PC's LED and transmitting its information to remote server by using its Ethernet port the card inside. So it will be "just physically" ...
0
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2answers
66 views

Communicating with devices from PC [closed]

For a few years, I have been using microcontrollers to do simple hobby projects that require using various communication protocols (serial, i2c) and toggling GPIO pins. However, the computational ...
2
votes
1answer
139 views

Is it a good idea to connect PC to a non-isolated DC supply

I am working on an AC Voltmeter. The supply to the microcontroller is not isolated. Only a bridge rectifier is used convert AC to DC. To get 5V, resistors are used to drop down the voltage. Is it a ...
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0answers
157 views

Controlling motherboard's reset switch remotely

Say I have a standard PC and I'd like to have a remote control over a reset switch. The easiest solution that comes to mind is RaspberryPI with a relay module. I connect to RPI and, via relay, short ...
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2answers
691 views

External power supplies and DC to DC converters for Computers and notebooks [duplicate]

Part one : I have this Question , as we know , Most notebooks power adapters are 19.5V output. While the CPU and GPU works on 12V and the SSD works on 5V . , so the motherboard should have two DC ...
0
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5answers
108 views

How can I calculate how much my desktop PC costs to run for an hour?

I was torn on whether to post this to here or Math.SE, so feel free to move it as appropriate. I recently got hold of a power usage monitor in order to calculate how much my PC costs to run a given ...
0
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1answer
117 views

PCIe DMA transcation to multiple PC RAM slots from FPGA

An FPGA endpoint needs to needs to transfer large quantities of data to the host processor's RAM over DMA. So memory mapping to a single RAM might not be possible. Normally high end PCs or Servers ...
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votes
2answers
141 views

Arduino shorted my PC USB drive [closed]

I am wondering what happened. Here are the things I did. connected 3 drone motors to ESC and then to arduino board. I double checked the connections, so pretty confident. I connected the gypo MPU ...
0
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2answers
255 views

Looking to bring 24V inputs to PC to store in database

I've been given a project that sort of bridges the electrical/PLC and PC/software world. I have to take a 24VDC photoeye and 24VDC encoder (1/4" to 1/2" pulse @ 540FPM ~ 1 pulse every 2.3ms-4.6ms) ...
0
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2answers
64 views

programmicaly switch electric power [closed]

I am an experienced programmer (mostly C#), I also know how to get along with physical electrical circuits, but do not know anything about how to start the simple task of connecting a switch (12v or ...
0
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1answer
250 views

How much current the PS-on pin on the motherboard's power connector can sink?

How much current the PS-on pin on the motherboard's power connector can sink? can it sink 100-200mA? (to activate a relay/solid-state-relay when the motherboard wants to turn/keep on the computer) (...
0
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0answers
59 views

What is the mechanism USB lose its connection when there is some noise or surge?

everyone! I've encountered several times that USB equipment on my desktop lose its connection at certain situations, and soon later re-connected again. I've searched the internet about the symptom ...
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1answer
112 views

electrical appliance on battery [closed]

hey guys i have a Intel nuc 6i3syk , on the back of it it saying that it needs 19V and 3.43A , that its fine as long i am indoors , my wonder its how do i make it run on 3.7V batterys , I got 10x ...
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2answers
166 views

Can I use offline UPS for a PC? Will the delay affect my PC if it is running when the power goes out? [closed]

Can I use offline UPS for a PC? Will the delay affect my PC if it is running when the power goes out? im planning to set up an offline UPS at my home i need my PC running without any disruption but i ...
3
votes
2answers
162 views

Can we replace an embedded system design with a general purpose computer or a smartphone?

I am a newbie to embedded systems design so this question might seem very fundamental in nature. I have been working as part of an Avionics team to develop an on board computing device for a ...
0
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1answer
333 views

Confusion about “host bus controller” and “host bridge”

Below part is quoted from the book "Beyond BIOS". Each host bridge is represented in EFI as a device handle that contains a Device Path Protocol instance, and a protocol instance that abstracts ...
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votes
3answers
114 views

loading different files into a PIC [closed]

Is there any way to load a file (of extensions .bat or .HTML) into a microcontroller and make the microcontroller run the file when it is connected to a PC using UART EDIT: thanks for information but ...
1
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0answers
357 views

Devices USB grounding

I just opened a PC a client brought, with some software problems. While fixing those problems I opened the case to check if there was something that needed maintenance and I noticed the USB shield ...
1
vote
1answer
108 views

Fan PWM Emulation with SATA power

I am just getting into electronics, and I thought I knew enough to make a simple fan control circuit. The idea is that I can install a switch into my PC case that I can press in order to add a fan ...
0
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2answers
83 views

Is there any device such as a typewriter or keyboard that is portable and can save data to a USB (other than a cell phone or smarthphone ) [closed]

I need a device for take notes Is there any device such as a typewriter or keyboard that is portable and can save data to a USB (other than a cell phone or smathphone ) please give me a suggestion
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3answers
1k views

Connect a micro switch to a PC serial port

How do I connect a micro switch to a PC's serial port and query whether it is open or closed? Which serial pin number(s) do I need to wire up?
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2answers
92 views

When has an embedded PC finished its shutdown process?

We have a product that has a PC running on a small board. Our product generally runs for weeks, if not months. One thing that is not very well implemented is the shutdown process. The device does ...
0
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3answers
786 views

Getting Clock/Time information from PC to an STM32F4

Assume I connect a microcontroller board (like an STM32F4) to a PC via USB. Is there anything in the USB communication protocol that contains host clock data? In other words, can I sync the ...
14
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4answers
7k views

What's needed to put a PC fan into reverse?

I've got a PC fan here (I've peeled off a sticker). And although this one doesn't come with the usual 3 or 4 wire connectors, it has enough electronics in it to only operate when power + is on red, ...
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1answer
225 views

PC monitor USB hub backfeeding inro PC

So I bought a Fujitsu P23T-6 Thor Edition a while back to use as a second monitor, it had an built in 2 port USB hub which I use for plugging in my keyboard and mouse. Now yesterday I watched a video ...
0
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1answer
119 views

What does short circuiting a RST front IO header do?

My motherboard has a connector to enable the use of a front panel RESET button: I would like to simulate the press of the button (equivalent to short circuiting the wires) by a Raspberry Pi, by ...
0
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1answer
492 views

Switching power supplies with a relay, how to account for delay between connections? [duplicate]

this is my first post on this site (but I will have more, have no doubt), so if I have posted in the wrong section or something please forgive me. Anyway, I am currently doing a battery powered pc ...
5
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1answer
197 views

Intel 8042: what are “test inputs”?

I've implemented a driver for the Intel 8042 (keyboard controller in the IBM PC AT). The IBM 5170 (PC AT) Technical Reference served as my, well, reference for that. The output port and the test ...
4
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4answers
4k views

How can I adapt a 3-pin PC fan connector to a 4-pin connector?

My computer's motherboard uses all four pin fan connectors with no support for speed controlling the older three pin fan connector. The problem is, all the PC fans that I have use a three pin ...
0
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2answers
515 views

Simple PC fan controller PWM discrete components

Recently I switched some case fans in my pc to find the horror that the new ones were even louder than the old ones. After some quick checks just by eyeing and monitoring on my pc I can confirm the ...
0
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3answers
657 views

Wireless Communication between microcontroller and PC

I have a FRDM K64f board that is using the nRF24L01+ as it's wireless transceiver. I want to communicate between the K64f board and my PC locally. I am struggling to find the hardware needed on my ...
2
votes
1answer
89 views

Question about FTDI USB-to-Serial Evaluation board [closed]

The evaluation board I am talking about the FTDI EVAL232R evaluation board which can be found at the bottom of this page. It employs a FT232RL IC. What I want to do I would like to connect a USB ...
0
votes
3answers
352 views

PC power supply as bench power supply [closed]

What do you think about converting pc power supply to bench power supply? Is it ok for amateur use? Edit: I thought it has some current limiting mechanism, but I see it doesn't. It's big problem in ...
1
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1answer
103 views

Is It Safe To Test A Pc With A Possiblly Burnt PSU

about a year ago my dell desktop pc wasn't turning on. the power button kept blinking orange. so I thought maybe something was loose or switched off. I looked at the back of the psu and saw a red ...
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1answer
1k views

FTDI code 10 - what can I do to resolve problem?

I am using the FT230X as a USART to USB interface on my boards. The first few work OK but then with the last one I get a Code 10 (cannot start) on my PC. It works fine on another PC when tried. I ...