Questions tagged [laptop]

Portable personal computer, normally with a foldable chassis

Filter by
Sorted by
Tagged with
32
votes
2answers
58k views

How does a USB C port provide the power to charge laptops?

I've heard about laptops such as the new Chromebooks that are charged via a wall charger that connects to a USB-C port. I'm quite happy that this will supposedly standardize laptop chargers but I'm a ...
22
votes
5answers
9k views

Can FPGA out perform a multi-core PC?

I don't understand how FPGA can be used to accelerate an algorithm. Currently I'm running a time consuming real time algorithm on a quadcore laptop so that four computations can be done in parallel. ...
2
votes
2answers
940 views

Grounding a laptop through the DC-jack?

I would like to reach zero potential difference between me and my laptop (to avoid ESD) before opening the back cover. I'll connect my wrist strap to a common ground point, thru a resistorized coil ...
0
votes
1answer
118 views

laptop battery care [closed]

Many people keep their laptops plugged in and charging when using them at home, and rarely if ever take them out of the home. This keeps the Lithium battery at 100% State Of Charge (SOC), which I ...
-1
votes
1answer
1k views

What's the purpose of this bulky cylindrical part near the plug end of a laptop charger cord? [duplicate]

I want to fix my laptop charger cord, I used a multimeter to check the voltage and it gives me less than one volt. It feels very flexible near the plug, but I don't know if I can cut before or after ...
3
votes
3answers
1k views

Are laptop cells balanced while charging?

I have little-to-no knowledge about how the laptop batteries work. I know there is a microcontroller to actually verify the balancing between cells (and in case blow up a fuse or something similar). ...
1
vote
0answers
39 views

How to detect pinout of trackpoint (probably ps/2) module?

I have following trackpoint module of recent thinkpad x390. There are some info about older modules, most useful(combined) one is: https://deskthority.net/wiki/TrackPoint_Hardware However, i found no ...
3
votes
2answers
239 views

How does a laptop maintain battery at full?

I know how a laptop battery becomes charged, however, I am not so sure how the power is maintained when when the battery has been charged to the maximum. I am unsure whether the laptop would switch ...
1
vote
1answer
2k views

What protection circuits do laptop batteries come with?

I am currently using an old lithium-ion laptop battery pack for my portable sound system. The battery seems to work pretty well for its age. I simply hooked up a cable to the positive and negative ...
0
votes
0answers
82 views

BTA16 (snubless version) triac was killed with 02 laptop adapter, please advice on how to overcome!

I found some threads asking on inductive load for triac can kill the triac with over clamping voltage, however, the thread is no longer open so let's me make a question here with a hope that the ...
0
votes
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 ...
0
votes
2answers
5k views

Plug in charger in laptop before plugging in mains outlet [duplicate]

Feel free to delete the question if doesn't fit here. Somebody told me, that a person should plug the charger in the laptop side first, then in the mains outlet, as if there is a current peak, it is ...
0
votes
2answers
97 views

What would be the safest method to power a laptop (IdeaPad 510 15isk) from a 14.8v battery pack?

Looking at my existing power jack and measuring it crudely with a cm ruler it looks like 3mm diameter x 1 cm length. The laptop bottom and charging adapter both say 20v @ 3.25 A max. What would be ...