All Questions
Tagged with adapter power-supply
67
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
0
votes
0
answers
28
views
Power adapter output voltage detection [duplicate]
Not sure if this is right place for this question, but since I don't know where else to ask, I will do it here anyway - if this is wrong exchange, please let me know ...
I have 35 W phone charging ...
- 1
2
votes
2
answers
294
views
Transformer that doesn't take power when not used
With Is this (working) 2-doorbell system dangerous? and Why is it impossible to connect these two doorbells in series or parallel?, I arrived to the conclusion I need a new 220 V AC => 10 V AC ...
- 1,946
1
vote
1
answer
80
views
Alternative power source or bypass altogether? [duplicate]
I need to replace this 20+ year AC/AC 7.5VAC (4.0MM x 1.7MM FEMALE) adapter, but can not find it anywhere.
I'm looking for advice on what may work in its place, or if there's a way to bypass it ...
- 13
0
votes
1
answer
75
views
What fire tests are done on power adapters/chargers?
I was curious about the fire risks in using a typical AC-to-DC wall adapter
(e.g., this)
and went to the UL website
to learn what exact tests were done to get the "UL LISTED" stamp,
but I ...
- 554
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 ...
4
votes
3
answers
5k
views
What adapter do I need to replace 4 AA batteries?
I have Yale Linus lock installed at my home. It has 4 AA alkiline batteries inside, and it grinds through them like hot knife grinds through butter. Therefore I want to convert it to an AC powered ...
- 143
1
vote
1
answer
221
views
Connecting 12 V RS485 appliance (soil sensor) to USB 5 V RS485 adaptor
I have a 12 V RS485 appliance that measures some soil resistance etc. It is a 7-in-one soil sensor, the 12 V version of the 5 V version shown in the link.
I could not find a 12 V USB to RS485 adaptor ...
- 11
1
vote
3
answers
224
views
UK Plug Adapter for LED light [closed]
I bought an LED lamp from Germany and it arrived with an EU plug and a UK adapter. I don't really want to use an adapter on it all the time fixed in my home (And also, the adapter they sent actually ...
- 119
-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
1
answer
2k
views
It okay to use 12V 2.5A adapter instead of 12V 1A? [duplicate]
I have a piano keyboard that uses 12V 1A adapter . The adapter was not working anymore so i used another one which was 12V 2.5A but after 45 minutes of usage the keyboard got little heated up in the ...
- 1
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
94
views
Separating power from data micro USB to HDMI
I have a camera which both draws power and sends its data through a battery pack to a custom monitor. The monitor also draws power as well as receives the camera data through the battery pack. (Both ...
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 ...
- 1
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