All Questions
24
questions
0
votes
2
answers
105
views
AC DC adapter sawtooth current draw above rated value
I will be using AC DC wall adapter to power the flyback converter. Power adapter is rated 15V@3A = 45W.
The question is, can I draw peaks over 3A if I stay below 45W on average?
For example, with the ...
- 125
1
vote
1
answer
604
views
USB plug adaptation for Dremel 7750
So, I recently threw out a bag of random chargers I didn't think I was using anymore. Later I found that my Dremel charger was part of these. I did however save all the connectors and just threw out ...
- 13
-1
votes
1
answer
1k
views
What will happen, in my router, if I connect 9V, 0.85A Power adapter to a 12V, 1 A adapter slot? [closed]
I have NETLINK HG323RGW GPON ONT Router, it uses 12V,1A, AC-DC power adaptor. ( Power consumption ≤9W )
I also have TPLINK ADSL Router which uses 9V, 0.85A power Adapter. ( https://www.tp-link.com/...
- 1
-1
votes
1
answer
103
views
9V and 12V adaptors - bad output [closed]
I have a couple 9V and 12V adapters ranging from 1A to 5A.
When I plug any one of them in, it produces accurate voltage but the current oscillates between 0A and anything up to maximum current and ...
- 1
0
votes
1
answer
49
views
Mobile charging during low main supply [closed]
Due to some electrical issues in my locality, the supply voltage of 230V was unfortunately reduced to 110V. When I connected the 5V charger (Input: 100-240V AC; 50/60Hz; 0.2A & Output: 5V 800mA) ...
- 9
0
votes
2
answers
280
views
Replacing a Switching Power Supply for an AC-DC Adapter
I am designing a 3D printer. I need 12V and 5 amp for powering the printer extruder and 11 amp for powering the heated bed.
At the moment I am using the model Model S-240-12 capable of delivering ...
- 515
2
votes
3
answers
12k
views
Increasing voltage, but same current [duplicate]
There are a lot of questions asking what happens if you change the current, but keeping the same voltage. If more current is flowing to me it means you can damage the device. But what if it is the ...
- 557
-1
votes
1
answer
86
views
How to properly compute device need and set of a Universal adapter for powering said device [duplicate]
So, I just blew the fuse in my 17" monitor using a universal adapter with the settings
Input: 100-240V 1.5A(1.5A) 50/60hz
Output: 15/16/18.5/19.5/20/22/24V (max of 70w)
I want a clarification of ...
- 111
-1
votes
2
answers
230
views
how can i decrease the voltage of an AC-DC adapter without decreasing current (mAmpire)
i have an AC-DC adapter with 5volt 350mA (actually an old cellphone charger). i need to decrease it's voltage to 3volt. i tried adding a resistor in series & it worked, but it also decreased the ...
0
votes
2
answers
8k
views
Do I use a 5V 2A or 3A DC adapter to power my 2m (6.5ft) WS2801 LED strip?
(Please excuse me if my English is bad)
I recently purchased a 5m LED strip, but I only need to power approximately 2m (6.5ft) of the 5050 RGB LED WS2801 strip, but I'm afraid that a DC power adapter ...
- 13
0
votes
1
answer
158
views
Max Current Output [duplicate]
Looking around at a couple of power supplies that I own such as a guitar pedal adapter that says it puts out 9V and 1700mA max, how does a power supply like this work so that it doesn't put out too ...
0
votes
1
answer
4k
views
Supply voltage drops AFTER connecting to device [closed]
I have a 19V 2.1 amp (power mentioned is 45 watt) laptop adapter connected to a 19V 2 amp laptop (in description power mentioned 10.2 watt).
When I plug the adapter, the multimeter shows the rated ...
- 289
0
votes
1
answer
394
views
Understanding the input specifications for a laptop adapter [closed]
The sticker on my laptop adapter claims the input should be
INPUT: 100-240V~ 2.5A(2,5A) 50-60Hz
What does all this mean? Here are a couple specific questions:
Can the adapter accept anywhere ...
- 449
2
votes
1
answer
490
views
Can I run this hard drive on 12Vdc 1.25A instead of 1.5? [duplicate]
I have a My Book Essential external hard-drive from WD that ships with a 12Vdc 1.5A 18 Watt adapter. Will I be risking everything by plugging it into a 12Vdc 1.25A adapter?
- 23
0
votes
4
answers
4k
views
Replacing adapter with batteries?
I have some device with ac/dc adapter [9v, 500mA], and I want to replace the adapter with batteries.
If I used [6 * 1.5v] battries, is that acceptable? do I have to worry about the max current of the ...
- 13