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

Filter by
Sorted by
Tagged with
1 vote
0 answers
62 views

PCB Silkscreen Marking

Today, I came on a PC board and the silkscreen marking have TG on it. What is the component for TG?
0 votes
0 answers
35 views

How to control the speed of four 12 VDC fans across two sources?

I destroyed my fan hub and am trying to replace it with a simple circuit. My PC has a fan header that can power the 12 V DC (not PWM) fans, however, it only supports two fans. So I am trying to power ...
0 votes
0 answers
72 views

28 pin SMD part marked AQ7DL identification

Can anyone help me identify this part? It is in my Dell AIO PC. It's located beside the power inlet. I guess it's some kind of power controller chip. P/N of MB is 0F65P3 It was burnt after a few ...
0 votes
1 answer
73 views

PC: Which crystal is used for main clock? (X570)

I want to improve intrinsic (hardware) precision of windows/linux (OS) time (specifically, in my case it's AMD X570 platform), without relying on periodic correction via NTP servers. Common approach ...
  • 3,167
0 votes
2 answers
58 views

Get on/off state of a PC (with 12V or 5V)

On a classical ATX mother board, how to get the ON/OFF "state" of the PC with a voltage? 0V if the PC is off 5V if the PC is on (or 12V or any other voltage) I thought about just taking ...
  • 1,752
0 votes
0 answers
50 views

Converted PC power supply producing too much voltage

I have converted two ATX PC power supplies to 12V bench power. They have worked flawlessly for the past 5 years. Suddenly, both are providing 17V+. What could be causing this? I have a 10ohm ...
1 vote
0 answers
72 views

HDMI ground loop from gaming PC to AVR

I have a ground loop from my HDMI from gaming PC to AVR. It's very annoying. Aside from getting an expensive ground loop isolation transformer for 1000 W, is there any other way? Is there an HDMI ...
4 votes
4 answers
3k views

Will putting a resistor between a PC's fanheader pins convince the BIOS the fan is on?

Will putting a resistor between a PC's fan header pins convince the BIOS the fan is on? Will it catch fire? Do I even need the resistor? How can I convince the BIOS the fan is on without a fan? Edit: ...
1 vote
0 answers
59 views

Connecting 4P4C RJ9 Headset to 3.5mm pc port

I have a Plantronics CS520 Binaural headset that I'm trying to connect to my PC instead of a desk phone. I'm using a TRRS with T connected to speaker+, R disconnected, R connected to Mic, and S being ...
  • 19
1 vote
0 answers
100 views

Detect if PC power is on/off then turn a TV on/off using an Arduino

I'm building an arcade cabinet using an old PC and an old(ish) Bush LCD TV as the monitor. The TV is connected to the PC graphics card via HDMI and all is good. However, the problem is that I want the ...
3 votes
2 answers
147 views

Why does IBM PC XT use advanced memory and IO write strobes instead of normal ones?

I'm trying to dig into the early IBM PC's arhictecture, and got stuck with one thing that is not really clear to me. Every PC XT schematic I saw, including the original one from "IBM 5160 ...
  • 33
1 vote
2 answers
91 views

Why can I use an AC power supply to spin DC PC-fans?

This question might seem a bit alarming and it did come up because of an inadvertency on my part. I tried to reuse old PC fans for cooling and grabbed an old phone power supply that wasn't being used ...
-1 votes
2 answers
81 views

Inductive load turns on PC mouse RGB

I have a floor fan connected on the same outlet as my PC. When the PC is off, if I turn on or turn off the fan the mouse RGB lights up for a split second. The mouse is plugged in to a USB port that ...
1 vote
1 answer
79 views

How to check the functionality of all the pins on stm32?

What happened: I was carrying my stm32 f401re inside a bag, and there was a little droplets of water inside the bag, when I removed the bag the MCU was wet, I wiped it gently on my clothes before ...
2 votes
2 answers
108 views

Substituting (possibly-proprietary) PC front-panel LEDs with commodity electronics?

Firstly, apologies for what I am sure is an incredibly novice question -- I have very little general electronics experience. Having previously built my home/hobby PCs from pre-existing components, ...
0 votes
0 answers
113 views

Is it safe to connect PC USB ground to 12V DC ground?

I want to drive a stepper motor (Nema 17), for which I have chosen 12V power supply (switching). In order to develop/play, I would like to connect a devboard (something akin Arduino) to USB. However, ...
0 votes
1 answer
86 views

Scope PC software to interface with a real scope [closed]

I have a HP54645D mixed-signal oscilloscope that can be fully controlled via RS-232. Is there some general-purpose oscilloscope software that provides a scope-like interface, kind of like the ...
1 vote
0 answers
68 views

Detect power/run status of PC in hardware

This may well be a daft question and/or a failure to google effectively (and apologies if this would be a better fit on SuperUser or somewhere else?) but is it possible, in low-level hardware, to ...
  • 6,889
-4 votes
1 answer
88 views

I accidentally poured Coca-Cola on my computer and it's the only one I have for studying [closed]

To solve this, I tried to dry it, and it kinda works. My PC get turned on but after that it began to turn off suddenly and the mouse is moving without any movement from me. How can I solve this ...
-1 votes
1 answer
91 views

What IC is marked WDG273?

I want to buy this USB watchdog V5.0 in order to restart my computer in case the PC hangs. As I'm an electronic designer, I was checking the hardware and when I saw the main IC reference, I said: &...
  • 23
0 votes
0 answers
181 views

Looking for feedback on Bitscope BS50U. Is it an old design, no longer maintained?

I need an entry level, very basic oscilloscope with some logic analyzing features. Bitscope BS05U (http://bitscope.com/product/BS05/) is back in stock at Newark for $55.69 and I'm thinking about ...
0 votes
1 answer
160 views

Adapting a 12V Dell power supply to a Lenovo PC - very naive questions

I bought on Amazon a chinese power supply for my Dell Latitude. It plugs into a 12V socket on my car and feeds 19.5V to the PC. So far, so good. Now I want to feed another computer, a Lenovo thinkpad ...
0 votes
2 answers
312 views

Can I use an AC rated momentary switch as a PC power button? [closed]

I was looking to make a custom button to power my PC (I needed something which was a bit more custom than the traditional push buttons for PCs (it's not important)) and I came across these: https://...
1 vote
2 answers
93 views

How do I incorporate output and input impedances connected to my circuit?

I'm designing a TTL to VGA DAC for a vintage PC, and I'm confused about the significance of the output and input impedances of my video card and monitor, respectively. The VGA spec states 75 ohms at ...
0 votes
1 answer
115 views

Could a PC consume more power from the plug if it oparates in a colder enviroment?

I have a mining rig (computer using its processing power to calculate hashes in order to eventually be rewarded with cryptocurrency tokens.) The program I use to mine tells me each time the power ...
  • 101
5 votes
2 answers
2k views

+ 12volt and -12volts from pc psu. Can I get 24 volts?

I have an unused pc atx psu. I want to make a bench power supply. The usual ebay breakouts give 3v 5v and +12v and -12v. Can I use an LM317 and make a variable output up to 24v? Any advice gratefully ...
1 vote
1 answer
98 views

Looking for ideas: An easy way to automatically press a key at computer restart

I'm looking to make a restart solution for a computer that doesn't necessitate manual input. I have a server with a BIOS that, when every slot of memory is full, automatically downgrades the speed of ...
  • 103
1 vote
1 answer
795 views

How to power 2x 12v computer fans with batteries & 1 switch

I am a total electronics newby (besides the odd solder repair) - I'm trying to create a robot with my son out of an old tower PC and he'd like to use the fans for eyes. I've seen that a fan can be run ...
  • 11
0 votes
1 answer
197 views

How exactly does getting 7V by connecting both terminals to the 12V and 5V sources work?

When I Googled MOLEX pinouts and checked some questions on Stack Exchange. I saw interesting images where if you were to connect both the 5V and 12V ends of the PSU connector to a device, you would ...
0 votes
0 answers
646 views

Add 5V bias power to use an electret microphone with XLR audio interface

I recently acquired an audio interface (Behringer UMC22) and, since it's quite a bit better than my motherboard, I'd like to connect my modmic 4 to the XLR mic input. The interface has phantom power ...
1 vote
1 answer
232 views

10Gb link data transfer between FPGA && PC [closed]

I'm trying to transfer data from 10Gb ETH subsystem of FPGA to 10GB ETH card of PC. SFP, RJ45 and ETH cable comprise of this data transfer pipeline. The RTL code is ready for testing and I'm looking ...
  • 113
0 votes
0 answers
177 views

200Ah battery for a 500W mini ITX PC

I want to make a project that allows a 500 watt PC to run on batteries for 4 hours, so it can be worn by an individual on their back. I found the below calculation to get the capacity of the battery ...
1 vote
1 answer
626 views

USB Qualcomm Quick Charge 3.0 on PC (Linux Ubuntu)

As nowadays PC motherboards supports USB voltage manipulation I will ask on given example hardware/software. I am using Ubuntu 20.04 installed on machine with Motherboard Gigabyte AORUS Z390 Master. ...
0 votes
0 answers
73 views

soldering new connector to pc mainboard

I know this is probably not the right forum but anyway. I have this old mainboard 01AJ155. In the picture below you can see it has two PCI x16 connections. One connector is used by my graphis card. I ...
  • 343
2 votes
2 answers
485 views

Adding a battery to my computer's PSU

Is it possible to simply add a car/truck battery to my computer's PSU output, in parallel, to make sure if there is a power outage, that the computer will seamlessly continue running, for a period of ...
  • 129
0 votes
1 answer
422 views

What is best to use for a desktop computer, 2 prong or 3 prong power plugs?

We purchased a second hand NEC desktop computer and just lately we had a long beep problem that occurred. I figured it might be the RAM, so I disassembled the system unit and cleaned the RAM. However, ...
1 vote
1 answer
242 views

MAX233 problem with receiving data

I need to make serial connection between regular PCs and a 3.3v TTL device, I using the Maxim 233 which has internal capacitors. I have the PCs incoming TD connected to R1_IN and RD T1_OUT. The ground ...
user avatar
0 votes
0 answers
41 views

How can I determine the correct voltage connector in an addressable LED strip?

I found a couple of cheap Addressable RGB strips laying around and they seem to have a different connector that won't fit in the current PC ARGB controller. I cannot identify what type of ARGB module ...
1 vote
2 answers
134 views

Blue Screen of Death for Beginners Learning C? [closed]

Someone I know wants to learn C, but run their own programs and exercises on a PC. Which is all well and good until we get to pointers. Is there a significant chance of them damaging the PC or ...
  • 13.1k
1 vote
1 answer
416 views

Idea for a PC bios beep buzzer

Hi I want to make a buzzer for my PC motherboard. Similar things like this: https://boip.in/home/rajiekart-pc-motherboard-internal-speaker-bios-alarm-buzzer-1-pcs-pack?gclid=...
1 vote
2 answers
266 views

When I switch my oscillating floor fan on it turns the audio off on my PC

When I switch off (not on, or up - there are 3 settings - only down and off) my oscillating floor fan my PC audio drops out. My PC audio is running through a USB midi controller (novation switch.) To ...
0 votes
1 answer
446 views

What does "TYP" mean in a datasheet?

I am designing a PCB model of the ATmega32 using Altium Designer I have found the word "TYP" in the dimensions of the ATmega32 in the datasheet. What does this word refer to?
0 votes
2 answers
92 views

What ist this component on early network cards with a slit in its package?

Early PC network cards (10BASE2, with a BNC connector) often had a two-pin component, typically yellow, with a slit in its package, close to the connector (image source): What is this component, and ...
  • 173
0 votes
1 answer
318 views

Need help identifying IC from Intel Mini PC PCB - top marking "1930 3614564"

I was looking into a blown up Intel Mini PC PCB (PIPO x8) and saw that a capacitor and a nearby IC were blown. I have no clue what the IC is or was for. Luckily I had a photo before it blew so I know ...
  • 21
1 vote
1 answer
6k views

Is that possible to modify and connect a dead smartphone camera to a PC using USB cable? [closed]

There are many videos on YouTube that explains how to use camera of a dead smartphone and connect it to phone by USB-OTG. However I want to know Is that possible to modify and connect a dead ...
  • 121
0 votes
2 answers
480 views

Is it okay to connect directly power supply to usb 5v? +<->+ & - <->- to maintain power?

I am working on an extention cable for my PC usb hub. It goes about 5m using UTP 5e cable, it sometimes can read the data from usb, sometimes it can't. I figured, it is because of voltage drop. So I ...
3 votes
2 answers
221 views

How can I discharge static electricity from my body?

I am planning to install a PCI Express Wifi-adapter in my PC. In order to do this, I would need to open my PC. I'm worried that if there is static electricity in my hands it could fry the motherboard. ...
  • 131
1 vote
1 answer
178 views

Building my own on-off button for a PC

I'm looking to build my own power button for my computer. Most motherboards have a pair of PWR_SW pins that your case power button typically attaches to via two ...
  • 111
0 votes
1 answer
100 views

Without the use of any software, what would be the cheapest way to connect my broken laptop's keyboard to my desktop?

I am trying to use an old keyboard from a laptop as a new set of keybindable keys for my desktop. I will worry about software side later what I need here is this: How can I use the keyboard from my ...
2 votes
3 answers
1k views

Does a personal computer have just one clock and where is it?

I want to check my understanding which I have gleaned from several sources, many of which seem to be out of date and many of which are conflicting. My understanding is that there is just ONE CLOCK ...
  • 511