Questions tagged [voltage]

Voltage is the measure of electrical current. This tag should only be used when asking questions related to powering computers and peripheral equipment. It is not for asking about voltage issues related to the commercial supply of power to your home or office.

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3k views

How to detect what wattage that my Windows laptop is receiving via USB-PD?

I don't know too much about USB-PD. I understood that USB-PD requires negotiation between the charger and the receiver. So probably my Windows laptop (Dell XPS 9570) should be able to know the current ...
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54 views

Powering my laptop from DC to DC converter?

I use my laptop Lenovo Y700 on solar system, but much energy is wasted when converting DC power to AC and then back to DC. So I bought a 12V DC to 20V DC converter. Is it safe? Or may it damage my ...
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2answers
8k views

Using RAM stick with different voltage?

I would like to upgrade the RAM of my laptop. its a Toshiba Satellite L850 - 13D, Windows 10 , 64 bits, it has 2 slots for RAM, the one I have is 4gb, I don't know if I can add another one, but ...
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1answer
3k views

Motherboard is showing 24v instead of 12v

I have put together a new PC build and when I turn on the machine it's showing me the following error/warning: "Asus anti-surge was triggered to protect system from unstable power supply" Besides ...
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1answer
86 views

Can I use a smart socket with an input voltage of AC 120V and plug it into a 220V outlet?

Using a Smart Socket Model SP10 Made by Teckin It's meant for use in the USA with 120V power outlets but it is being used in the Phillipines with 220V power outlets.
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Liquid spill Keyboard & Mouse = risk for the PC?

Great Monday start with my coffee spilled on my mechanical keyboard and my mouse... I tried soaking up as much as possible but didn’t open them up to see. For the keyboard when I removed the keys and ...
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1answer
13k views

Lenovo Trim Yellow rectangular power adapter

Need Lenovo Yellow Power adapter connector information, its a MYSTERY to me!! Options ‎ Hello all, I recently just purchased my first Lenovo products with the new Yellow rectangular power adapter. ...
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72 views

low voltage POST only means battery problems?

No doubt the watch battery on the motherboard long since lost its juice. However, I'm not quite sure what error I saw on boot, I think it was before POST and I think it mentioned "low voltage&...
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Can computer power supplies use North American 240V (hot-hot-ground)?

Simple question: Most computer power supplies are auto-sensing between 110V/120V and 220V/240V. This begs the question, can they use 240V in North America i.e. connected to both hots (red and black)?
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Should I be concerned about this voltage reading (via SpeedFan)?

Been having computer issues. (My computer has been freezing the past couple of days, but in a rather odd manner: once it starts, each program freezes after a couple of seconds of being used. Note that ...
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Low voltage readings in BIOS and other weird readings

I have an older ASUS H97 Plus mainboard (using an Intel Xeon processor), never updated the bios. Two or three years ago I started getting Surge Protection warnings so I replaced the PSU. Today I ...
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1answer
154 views

Can I use a power supply with different input/output voltage for router?

I bought a Verizon g3100 router; it did not come with its external power supply. The needed cord has an input of 105-125v ~ 60Hz 1.5a and output 12v 3.5a. I can't find exact cord anywhere but I ...
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63 views

12v from Notebook Mainboard to attach 3.5 inch HDD

I plan to build a low-budget low-power home server, mainly as a NAS. My first Idea was to simply use a RPI 4, it has USB 3.0 and Gbit Ethernet, but I think the hardware is too slow to be fun. For ...
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249k views

Hooking up my power switch/reset switch/LEDs

I'm working on building a computer (first time for me). There are several plugs that I need to connect to the motherboard (Power LED, reset switch, etc). Of the two wires, they are either: Color ...
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44 views

How to replace my power supply safely?

If something is powered from a 9 V and 1 A supply, you can replace it with a 9 V and 1 or more amp supply. How would one calculate if it is safe to replace it with a less voltage and less amperage ...
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333 views

12v line is showing up to 14v in BIOS (DMM reading are fine)

Purely by chance, upon rebooting, in the BIOS, I saw that 12v line was showing 13.9v, although I used the computer normally all day long. After resetting all settings in the BIOS and reboot, nothing ...
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2answers
283 views

Laptop charger 19V 6.32A 120W Adapter as replacement for 20V 7.5A 150W [duplicate]

Is it safe to use 19V 6.32A 120W Laptop Charger / Adapter , because I lost my 20V 7.5A 150W adapter and the only one I could find locally is the 19V 6.32A 120W , currently using the laptop for Gaming ...
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Is this RAM overclocking?

I have 2 DDR4 sticks (2x16 GB) running with a 3700X Ryzen CPU with an MSI B450M Mortar Max motherboard: one 2x16 GB Crucial rated at XMP 3200 MHz CL16 18-18-36-72 at 1,35V one 2x16 GB rated at XMP ...
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2k views

Voltage on PC case is making problem

With test light I can detect voltage on my desktop pc case and I believe it's the reason that my HDD fails some often or my pc hangs. When I connect my case to ground (metal door frame) it works with ...
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77 views

Does the voltage supplied to a CPU differ per core?

I'm currently trying to find a range of safe voltages for CPU overclocking. As a start, I looked at the automatic stock voltages: Without any Turbo-functions, the voltages in this case range from 0....
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1answer
25 views

Can’t Determine charger is compatible? [duplicate]

The original charger that came with my laptop: input: 100-240v ~ 1.2A 50-60Hz output: 19v 2.37A The new charger that I got: input: 100-240v ~ 2.5A 50-60Hz output: 19.5v 4.62A Will this charger be ...
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1answer
2k views

Are all DDR3L (1.35V) DIMMS safe to use in a computer system that uses DDR3 (1.5V) DIMMs?

The sales support of (the consumer/prosumer sales subsidiary of) a DRAM manufacturer answered a pre-sales question I made with (translated from an email in French): 1.35V Memory DIMMs are dual ...
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2answers
861 views

Can I use different laptop charger- similar Voltage, higher Ampere? [duplicate]

My original laptop charger was output 20V 3.25A. Now I have a charger with output 20V 6.75A. Can I use it? (The real data: Can I charge Lenovo Yoga 11s with Lenovo IdeaPad 15?)
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2answers
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Can low voltage damage laptop or it's battery?

Sometimes I get very low voltage in my house. I am worried if I connect my laptop charger to the socket, will it damage the charger, battery or the laptop itself?
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can i power a device with more output amperage than the device needs? [closed]

I just brought a speaker that runs on 12v power supply. So i want use it on my car. Can i power a speaker with a car battery 12v directly? Speaker input: 12V, 1.25A Car battery output: 12V
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0answers
786 views

Is it safe to use non-genuine laptop's battery

I own an Hp pro-book 430 G2 Laptop, While I found batteries compatible with this model they weren't exactly the same. My battery is RA04XL while What I found has RA04 written on it. Both batteries Li-...
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2answers
71 views

Why does RDIMM-type memory require less voltage from the CPU?

I have read the following: https://www.anandtech.com/show/6068/lrdimms-rdimms-supermicros-latest-twin/2 https://en.wikipedia.org/wiki/Registered_memory https://www.pcmag.com/encyclopedia/term/62658/...
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3answers
12k views

Mouse rating 1.5V | Can I use a 1.2V rechargeable battery safely?

My mouse rating is 1.5V, I've been using it with alkaline AAA batteries which provide 1.5V. My question is, if I have a 1.2V rechargeable battery, is it going to work anyways without issues? I'm just ...
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1answer
355 views

Inverter Voltage Output Measurement

I have an old notebook which the backlight is not working. In order to know the reason why, it would be interesting to measure the output voltage 'Vout' from the inverter. Unfortunately, there are ...
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1answer
498 views

Using slightly different voltage battery for my laptop

I’ve an acer laptop (Acer aspire e15) and it’s battery was blown up and doesn’t work anymore. So I ordered a new battery off amazon with correct voltage which was 11.1V as it was written on the ...
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3answers
7k views

Can I run a router with a lower voltage power adapter?

The power adapter for my Linksys WRT54GL v1.1 router died - its output was 10V, 1000mA. I've tried using a replacement adapter (7.5V, 1000mA) and so far it works. Is this situation stable, or should ...
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1answer
153 views

Do i need voltage stabilisers for Computers and other electronic devices without motor?

Searching on internet i've found this article https://www.bijlibachao.com/appliances/voltage-stabilizer-for-television-refrigerator-air-conditioner.html Where i've read that electronic devices and ...
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0answers
87 views

PSU voltage and microfreezes

A week ago, my PC started exhibiting a problem. When scrolling in a web browser or trying to game, microfreezes happen randomly. The PSU is five years old, and some of the voltages look out-of-spec, ...
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1answer
99 views

Does Silicon Lottery apply to individual CPU cores/threads compared to the others?

Can individual CPU cores or threads clock faster than the others due to Silicon Lottery? Is it then reasonable that the rest of the cores are held back by the slower one as they need to match it's ...
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1answer
80 views

Dell xps 9350 battery voltage issue

I have Dell XPS 9350 model which has battery issue. So I brought another new battery which is not original yet good one. Now my question is My original battery has 7.6v but the other battery which I ...
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1answer
66 views

Using two different chargers for the same laptop

I have laptop HP 650 G1 It came with charger with specs: INPUT 240V - 1.6A 50-60 HZ OUTPUT 19.5 V-3.33 A So I want to know is it safe to charge laptop with another charger (same connector, also from ...
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3answers
8k views

I am in a EU country where it says on the socket 16 A / 250 volt. Can I charge my laptop which takes 100-240 volt / ~1 A?

My laptop started turning off randomly and I thought maybe it's because of this socket.
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1answer
2k views

Will my laptop be ok with this different laptop charger? [duplicate]

Possible Duplicate: Charging laptop with non-original charger How can I tell if an AC adapter is compatible with my laptop? So the original laptop charger broke and I switched to a charger from ...
0
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1answer
478 views

Can i use a universal laptop charger for +10.8v 4400mah, 47wh [duplicate]

I have a universal laptop adapter with listed voltage that i can set 12v/15v/16/18/19/20/24v.. i want to try it on my asus laptop with battery rating of +10.8v 4400mah, 27wh.. it's an li-ion battery. ...
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0answers
84 views

Abnormal voltage range and frequency activity on Intel 8550U

I have recently purchased a secondhand/refurbished HP laptop with i7-8550U CPU and MX 150 GPU. The first thing I noticed is that it runs unreasonably slow on games, much slower than my other i7-8550U +...
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1answer
23k views

USB-C Chargers: Is it safe to charge a phone with a laptop's power supply?

I have an HP Chromebook and a Nexus 6P smartphone, and both of them use USB-C connections for charging. When I plug the Chromebook into the Nexus's charging cable, it works fine and I just get a ...
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1answer
1k views

Using 3.5“ internal HDD connector for a internal 2.5” HDD

I had a 3.5 inch internal HDD, and to connect it externally, I bought a 3.5 inch connector (as 3.5" HDD requires 12V power), which had a chip and external power adaptor - as 3.5 inch HDD can't ...
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1answer
92 views

Powering a Acer netbook using a Lipo battery

Is it possible to power a 10.9v rated Acer Aspire notebook using a 10.9v/3300mah Lipo battery pack via charger port? Charger seems to be 19v. Does Notebook really need 19v to work? I want to use the ...
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4answers
5k views

Can I have too high a PSU power rating?

I have just ordered a 650 W PSU for my computer which previously had a 300 W, in order to install a more powerful graphics card. However, I didn't check whether anything would blow up ...
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132 views

Thermistor to Celsius/Fahrenheit/Kelvin in MATLAB

Thermistor to a Temperature Unit in MATLAB I am using an Analog Read Pin on an Arduino Uno to read the temperature as given by a thermistor. The resistor being used on the thermistor is 220𝝮. What I ...
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1answer
560 views

Choosing the right stabilizer / Voltage Regulator for Laptop Charge carts (40 capacity)

A client has a laptop charge cart rated input @ 125VAC & output also @ 125VAC. Total 1875 Watts. specs: http://www.v7world.com/us/products/charge-carts/charge-cart-30-devices.html#horizontalTab5 ...
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1answer
2k views

probe processor voltage in linux

I am in a redhat server I've tried to use lm-sensors to detect my processor's voltage, just like CPU-Z in windows environment. But after I using the command "sensor-detect", only processor's ...
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0answers
39 views

What do I need (powerwise) to plug my French gamer PC in Canada

I read on metastack that superuser is the place to ask hardware related stuff, hope it fits. I recently move from France to Canada and I'm going to get my gamer PC shipped soon. What will I need to ...
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1answer
1k views

Power Supply case measures 75V?

My friend showed me his dead computer. When I powered up, the green LED on the motherboard didn't even come on. He had bought a new $40 500W power supply and he wanted me to install it. I did, and ...
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2answers
236 views

Is 208V 3phase enough to supply a 220-240V UPS?

Our input voltage is 208V 3-phase but we are not certain if it's capable of powering a 220-240V APC UPS. Can this power supply be used with this input voltage?