All Questions
10
questions
1
vote
2
answers
1k
views
Reusing a HP laptop charger of 3 wires (logic inside)
I have an HP laptop charger 18.5v 3.5A (1X2057... WBGST0A...)
In the past the charger was working fine and I removed the tip for an experiment, so I can't check wires measuring the original tip.
Wires ...
- 155
3
votes
3
answers
17k
views
How do I wire up an aftermarket USB Type-C connector so that it works?
I recently broke the male port of my USB-C laptop charger. I already got a new one, but I would like to fix and repurpose the old one to be the power for my Raspberry Pi 4 instead of throwing it out.
...
- 137
0
votes
0
answers
63
views
Use old battery pack charger as DC power supply?
I have an old charger for NiCd battery packs. It is labeled with:
Input: 230 V~, 50/60 Hz, 33 W
Output: 4.8 - 12 V DC, 1.4 A
I opened it and found a transformer and two circuit boards. I made a ...
- 193
0
votes
1
answer
307
views
How do some phone chargers raise their output voltage when loaded?
I got a Samsung phone charger some time ago. The text on it says 5.3V/2.0A, and when I plug a USB meter on it, the meter reads 5.3V 0.0A. The meter itself consumes a maximum of 0.02W (so 0.004A - safe ...
- 159
0
votes
7
answers
8k
views
Calculate the electric bill of a phone charger (AC adapter input or output?)
I need to calculate the amount of money I pay for charging my phone with this charger
I know that I need to calculate the watts then kWh, so I multiplied 5 V by 1.55 A to get 7.75 watts and then use ...
- 5
1
vote
0
answers
381
views
How to force USB device to drain 500mA Current for charging?
I designed an AC-DC converter circuit(220VAC to 5VDC@700mA) to create a smart phone USB charger.
The Transformer that I used in my design can supply only 700mA current.
I searched the Web and ...
- 19
6
votes
3
answers
2k
views
Why AC supply is rectified first before stepping voltage down?
I have opened one of my phone chargers and was trying to understand how it works.. I found IC MB6F just at AC input which came out to be a bridge rectifier.
My question is why AC is first rectified ...
0
votes
1
answer
1k
views
Looking for circuit diagrams of current mobile phone chargers [closed]
I am writing an investigation into how a mobile phone charger works and I'm required to break down the internals with a block diagram with component explanations. To help get me on track I'm looking ...
-1
votes
1
answer
861
views
Need to make a laptop charger [closed]
I am not an electrician. My laptop's charger burned when we had high voltage 2 days ago. My laptops charger says Output is: 19.5 V and 9.23 A. I am in a country that you can't easily find those kinds ...
- 153
1
vote
1
answer
5k
views
Can I use the output of mobile charger as a DC source for my circuit?
The title explains it all. Can I use the voltage and ground pins from the mobile charger and use it in my breadboard circuit? Is it safe?
If it isn't, what is the thing I need to buy so as to convert ...
- 69