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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61 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://...
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42 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 ...
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1answer
106 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 ...
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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 ...
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32 views

Looking for ideas: An easy way to identify a frame of VGA or DVI video?

I'm looking to make an auto-restart solution for a computer. I have a server with a BIOS that, if every slot of memory is full, automatically downgrades the speed of all the memory - it's an ...
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1answer
43 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 ...
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1answer
68 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 ...
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107 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 ...
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1answer
65 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 ...
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76 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 ...
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1answer
94 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. ...
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37 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 ...
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2answers
68 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 ...
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1answer
96 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, ...
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1answer
74 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 ...
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29 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 ...
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2answers
108 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 ...
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1answer
75 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=...
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2answers
109 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 ...
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1answer
186 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?
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87 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 ...
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1answer
158 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 ...
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1answer
1k 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 ...
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How to install Arduino Driver, if it is not discovered by pc(Win10)?

I bought an Arduino Uno on amazon, and when I connect it to my pc it is not discovered by the pc. Even if I use hdwwiz and install the driver, it says that the ...
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2answers
86 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 ...
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2answers
89 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. ...
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1answer
109 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 ...
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1answer
74 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 ...
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3answers
334 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 ...
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1answer
87 views

Assemble back a momentary switch

I have this momentary switch that is used as a Reset switch on my computer : I opened it and I'd like to assemble it back. It's made with these parts: the push button the grey "frame" a ...
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439 views

Can undervolting damage my laptops fans?

so I started reading a lot about undervolting etc. and tried it myself. I use a lenovo yoga 920 and I dont do any hard workloads, but the fan noises annoyed me as lenovo is known for its loud fans. I ...
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60 views

Which device will allow me to simply capture 24v?

I'm new to electronics, struggling to work out whether this is simple and I'm missing something or whether it's a lot more complicated that what I anticipated. I have something (some device) that is ...
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1answer
1k views

Is there a way to use the i2c interfaces on a standard PC mainboard to control a device?

I have attached a few sensors and an LCD display, all of them having an I2C interface, to my raspberry pi, and written a software on the pi to read/write them. Right now, I have a network daemon ...
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0answers
1k views

How to calculate: watts for AVR, VA (volt-ampere) for UPS

I intend to buy an AVR or UPS, and I want to add a few external HDD's & a few Mini PC's. I need to calculate how much power is used by every device so I don't overload the AVR or UPS EXAMPLE: ...
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614 views

Grounding Yourself When Working On Electronics

I was wanting to discuss if using a wrist strap connected to a in unpainted screw on a pc power supply (this screw is a mounting screw it is not touching anything inside the power supply) that is not ...
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1answer
1k views

How to DIY BaoFeng radio-to-soundcard cable?

I've got a cheopo BaoFeng UV-5RE that I'd like to try as packet radio. I've snipped the plug off of the headset that came with the handheld, soldered it onto some breadboard cables, and did the same ...
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1answer
61 views

Can hardware damage cause a computer (or a smartphone) to make miscalculations or logical errors?

I want to put an example. If I have a motherboard, some elements dropped (such as capacitance or resistance). When I install it into a computer, it can pass Power on Self Test and successfully launch ...
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1answer
88 views

Why do PCI Express riser/adapter cards have electrical components?

I'm looking to make a custom PCI Express right angle adapter because the ones on the market don't work with my space constraints. Now, because it's basically an extension cable, I'd imagine it should ...
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1answer
88 views

Inrush current with capacitors connected to USB in parallel

I did a project that connected to the PC USB. When the PC is being shut down the Vcc (5 volts) is halted. But I need the voltage source to stay for extra milliseconds after the voltage halt. For that ...
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1answer
2k views

Minimum requirements to interact with PCI Express

I have a relatively simple project (from the user point of view) in mind. I want to develop a very simple PCI Express (x1) card that users can put into their system and toggle some GPIO's from a GUI ...
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1answer
118 views

basic DIY function generator and scope

I'm currently traveling and only have access to basic parts (soldering iron, an arduino nano and a breadboard!) but I'm able to buy parts from local suppliers. for a project I need to be able to ...
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4answers
552 views

How to do this USB transfer? [closed]

I have a scenario that, When receiving data through UART (STM) ,same time the data is displayed in the notepad(opened in PC) through USB. How can I implement this? I am using stm32 micro ...
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1answer
198 views

Messages sent when keyboard key is pressed [closed]

When pressing keys on a keyboard what messages are sent to a PC? Is it OK to send this message using a micro controller (through USB cable)? This is the protocol format i got from website. how to ...
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1answer
87 views

Design PC mainboard from scratch [closed]

As a hobbist I always wish to design own PC mainboard. I want to try build such PC based on I3-390m CPU (pga988) and bd82hm55 chipset. Any clue where I can find some datasheet or circuits that can ...
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1answer
149 views

Using WS2812b LEDs in series [closed]

I'd like to convert some of my PC case fans to be compatible with Corsair's RGB system to fit with other case fans. Corsair has an RGB fan hub that allows you to connect RGB fans to it, then connect ...
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1answer
138 views

PC 12v rail shows ripple under load when checked through a multimeter

Recently after having some issues in my gaming PC, i checked the 12v rail under load(benchmark). The 12v rail dropped to 11.6v that's within spec. But when i switched my DMM to AC it was giving me ...
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2answers
128 views

Choosing the right power cord for my PC adapter [closed]

I need to replace the euro power cord on my new PC with a UK one. The power adapter for the PC has the following rating: Input: AC100-240V - 50-60Hz, 3.5A Output: 19.5V (direct current) 11.8A The ...
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1answer
2k views

Inject 5V bias power (“fake” phantom power) for microphone (ModMic)

I've recently bought a ModMic4 for my PC, but the signal level is very low and have to amplify it quiet a lot digitally, which introduces ton of white noise and I have to use noise supression which ...
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2answers
61 views

How to choose the correct pc fan? [closed]

I need to replace a pc-fan 2 pin(80X80X25mm). The only details it has are:12V/0.14A.(no RPM/CFM details). Will those details(voltage/current)enough and i can pick any 80X80X25mm 2-pin pc fan which has ...
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384 views

How thick is a computer RAM module?

I was just using a DDR3 RAM module as a feeler gauge and it fit the gap perfectly. However, then I tried to find out how thick it actually is and I couldn't find any specs. I'm assuming it's ...