All Questions
12
questions
0
votes
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answers
104
views
How to make a recent laptop touchpad work on PC with an external PS/2 USB adapter
I want to make a laptop touchpad work individually with a USB adapter, but failed, on a recent Thinkpad E14 touchpad part.
Some articles on the internet said they succeeded connecting the touchpad ...
- 1
0
votes
1
answer
49
views
How can the voltage of the original battery differ so much from the voltage of the original adapter?
It's about Xiaomi Mi Notebook Pro 15.6" 2019 JYU4148CN.
The original battery has a voltage of 7.6V and a current of 7.9Ah, the total Capacity is 60,040 mWh.
The original adapter has a voltage of ...
- 101
0
votes
1
answer
130
views
Inverter output to power laptop
I would like to gather info on power requirements for an electric system for a caravan, but I struggle with basic understanding.
My laptop needs to run off the 12 V battery, but the laptop charger has ...
0
votes
1
answer
1k
views
AC adapter makes high pitched noise when a notebook is turned off or asleep
When I put my notebook into sleep mode or turn it off the notebook's AC adapter starts making a high pitched noise. When the notebook is on the adapter doesn't make any noises. Could anybody explain ...
- 103
0
votes
1
answer
566
views
Is it OK to power a laptop using a voltage regulator? [closed]
I am trying to build a power module to power my laptop using a 12V lead acid car battery.
The output specs on the laptop charger read 19.0V and 3.6 amperes.
I have tuned a voltage regulator with ...
- 13
0
votes
0
answers
377
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
0
answers
99
views
Using a li-ion battery instead of an AC adapter
I have a board that uses a 19v 3.42A AC adapter as a power supply and I want to replace that with a Li-ion battery. What should the voltage of the battery be? I ask this because my laptop for example ...
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2
votes
1
answer
4k
views
Function of the Third Pin Inside Laptop Barrel Connector
So I've been doing research on barrel pin connectors, and have been trying to apply this knowledge to understand laptop barrel connectors, specifically. My confusion relates to the function of the ...
-5
votes
4
answers
78
views
Is it better to get a laptop from your country? [closed]
My knowledge about the inner workings of electronics is very limited, but I'm planning to move country that uses a different voltage system and I was wondering if it would matter if I bought a new ...
- 117
-2
votes
2
answers
766
views
How do I do to solder the adapter in the port and still use the same usb port without ruining the notebook? [closed]
I have a laptop that the wireless network card does not work, but I do not want to use my usb input for putting an external adapter, my idea is to open the laptop and solder the adapter inside the ...
- 113
0
votes
1
answer
2k
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Using a laptop charger with the wrong polarity? [closed]
I just bought a replacement charger for my Fujitsu Lifebook AH532, but it seems like it has the wrong polarity. The backside of the laptop has a label saying it should be like this: https://imgur.com/...
0
votes
2
answers
36k
views
connecting a hp laptop charger adapter three wire output to a two wire cable [closed]
My laptop charger adapter broke and I a have this other old adaptor in the house. They both have the same voltage(19V) and 1.58A. The first adapter(The one that broke) has three wires (black, white, ...
