All Questions
57
questions
0
votes
1
answer
82
views
Old piano Power adapter [closed]
I bought an old Roland EP-9e digital piano from eBay. The seller mentioned that it was missing a power supply. I purchased a matching power supply, 12V DC 2A. However, upon trying to plug it in, I ...
- 1
3
votes
2
answers
144
views
Adapter Power draw
On the adapter it says Input ~230V 1.5A, Output 29V 1.5 A.
If the adapter draws 1.5 A at 230 V and transfers them at 29V wouldn't that mean a power consumption of (230-29)V *1.5A = 301.5W in the ...
- 33
2
votes
1
answer
775
views
How to loosen DC barrel jack to fit with 12 V adapter?
I have a DC jack such as this:
The lot that I bought are all too tight to fit a 12 V Adapter plug into them. Plug:
How do I loosen the jack? Are they always stiff when new? Should I buy new ones? ...
1
vote
1
answer
100
views
Battery replacement for 16 VAC
I have a mains power adapter that powers a small model train set. I would like the option to power this off a rechargeable battery, although I'm not sure this is possible, as it uses AC.
My current ...
1
vote
2
answers
165
views
Getting rid of AC DC adapters
Getting rid of AC/DC adapters
I'm aware of the above question but feel it didn't address my situation.
Note: Robot meant to be an underwater ROV(Remotely operated vehicle)
I'm designing a robot and ...
- 21
-1
votes
3
answers
256
views
Is it OK to use a 17 V adapter instead of a 16.8 V adapter? [duplicate]
I have an old model mixer which uses a 16.8 V, 500 mA adapter. The adapter broke and I cant find any adapter that provides the specific voltage and current. What I found is 17 V, 600 mA instead. My ...
- 3
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
0
votes
1
answer
1k
views
Device (Rasberry Pi device called a Bobcat 300) continues to burn out power adapters
I have a Rasberry Pi device (a Helium miner, a Bobcat 300), and I'm now on my 6th power adapter for the device, as all of the previous adapters have burnt out after 1 or 2 weeks.
Here is the pertinent ...
0
votes
1
answer
68
views
What is the type of AC power in Power supply/Adaptor rating?
Most of times, Power Supply or Adapter has an annotation related to the power rating such as in this figure
For the red underlined value, I understand that it is the actual delivered DC power, and ...
- 149
0
votes
1
answer
297
views
Capacitor and resistor in parallel in output 19V laptop charger [closed]
I have been studying with my charger and I cannot figure out why it leak ac while also providing DC 19V. When I touch anode and cathod of the charger and checked it, there were no ac current flow. I ...
- 11
1
vote
2
answers
268
views
Using a 100W External Power Pack to Run / Charge an Old 19.5v Laptop [closed]
I have just ordered the new Flash 2.0 battery pack. Specs are here, but briefly:
100W USB-C Power Delivery 3.0 Output: 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/5A (PPS)
I've also got an old HP Pavillion ...
- 113
0
votes
2
answers
2k
views
Will connecting a NEMA 14-50 to a IEC 60320-C13 in this manner present issues
I have a japanese item in my house which takes a considerable amount of power (>1.5 kW) and takes a C13 power plug expecting 210-250V at 50-60Hz.
My idea was to connect a NEMA 14-50 power cord in ...
- 687
1
vote
3
answers
7k
views
Using a 9V battery instead of a DC power supply
I have a DC power adapter that has the following specs:
Input Voltage: 100-240V AC, 50-60Hz, 0.5A
Output Voltage: 9V DC, 1.5A
I am interested in taking a 9V ...
- 113
-2
votes
2
answers
11k
views
splicing ac adaptor cord which is positive and which is negative?
i lost my original asus router power adaptor. so i have a 12v power adaptor with a tip that fits my 19v asus wifi router, and i have a old 19v power adaptor that has a tip that is too small to fit my ...
57
votes
1
answer
7k
views
What does this symbol mean on my Samsung travel adapter?
The charger was bought in Austria two years ago, and I know about all symbols/labels except this one. Google reverse image search did not help.
