Questions tagged [adapter]

In electronics the term adapter is normally used to describe something that converts from one connector or package to another. For example a BNC to SMA adapter is an example of a connector adapter, while an SOIC to DIP adapter is an example of a package adapter.

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46 views

Reduce voltage/amperage from adapter to fit another device

Complete newbie here. So I got this old gaming console with the original adapter, which outputs 8.2V / 850mA. The cable connection with the body of the adapter is somewhat loose, though, so if you ...
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1answer
40 views

Converting Battery Operated Motion Sensor Light to AC Powered

I have converted many battery powered devices to AC adapter in the past. This time around I am using a Motion Sensor light which takes 4 C batteries and is used to light a closet. When I connect a ...
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How turbocharger mobile charger works?

I have found a turbocharger from a motorola device which has 5V, 9V and 12V outputs. I want to use this charger to run raspberry pi 4. I need to know how tutbocharger changes the voltage? I am scared ...
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44 views

Are travel adapters safe to use permanently? [closed]

I got a phone from Malaysia and it comes with a UK charger(I think? see pictures). I live in EU and would need to use an adapter permanently to charge it using the fast charger it came with. Is it ...
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1answer
124 views

How to create an airline headphone adapter?

So, I have a predicament: I am a 6'5" guy with massive ears. Like it's not funny how big my ears are. When I go on an airplane, the headphones they give me are terrible and hurt my ears when I wear ...
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Is it safe to wire an AC-DC adapter directly to a DC motor? (with this setup…)

I just wanted to check that this setup is safe as I am not an electrical engineer, nor am I experienced... I am using an AC adapter which outputs 12 volts DC. It has a max current rating of 6 amps. I ...
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29 views

Adapter to plug home audio system speakers into computer

I'm wondering if there is an adapter I can use to plug two speakers that came with my home audio system into a laptop. My laptop has an auxiliary port (not sure what the technical name is) that I plug ...
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93 views

Why does dropping my laptop's AC adapter in the floor make it work again? [closed]

For several months now I've had trouble getting my AC adapter I use to charge my laptop to work. It's one of those typical looking things, with two ends and a big bulky rectangular thing in the middle....
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1answer
254 views

Why would a USB-C adapter have a pull-up resistor?

I'm talking about a USB type-C male to USB type-A female adapter, the ones you need to connect a USB flash drive to the latest MacBooks. According to USB-C specification, this sort of adapter needs a ...
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Which adapter is more suitable for a pressure transducer?

For my student project, I'm going to be using a 4-20 mA and +/- 10 V output pressure transducers and the output of these sensors will be going into a DAQ system that we purchased from DEWESOFT. Along ...
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1answer
76 views

What are these soldered/un-soldered dotted-shapes? on the traces which don't have soldermask?

Please look at this image(see the soldered/un-soldered dotted-shapes which are identified by arrows). This circuit belongs to a laptop adaptor. What are these soldered/un-soldered dotted-shapes? As ...
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Why are these traces shaped in such way?

Please look at this image(see the PCB traces within the circles). This circuit belongs to a laptop adaptor. What are those parallel soldered-traces on the PCB traces? Why aren't they soldered to ...
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1answer
52 views

Looking for a connector with only images to go on

I'm trying to find the connector used for my vehicle's accelerator pedal. Are there any strategies for finding connectors like this?
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1answer
69 views

RS485 full duplex to Adapter with A and B ports

I need to configure a sensor (Thies 3D Sonic Anemometer, Manual: https://www.biral.com/wp-content/uploads/2015/01/4.383x.xx_.xxxUS3D.pdf) via my computer, it has RS485 full duplex and half-duplex ...
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Is it safe to use a 19V DC adapter for a 12V input if it can provide enough watts? [duplicate]

I have a small TV which expects 12V DC at 34W. Can I use an adapter with a higher voltage rating (19V for example) as long as it can provide enough amps to satisfy the amount of watts needed by the TV?...
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1answer
132 views

How do USB to serial adapters work?

I'd like to know how a USB to serial adapter (such as the FTDI FT232RL chip) works. The way I think it does is the following: Picture a system composed of a MCU, a USB to serial adapter and the PC ...
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77 views

Yellow tip polarity

What does the yellow tip on some adapters mean vs the blue or silver
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Identifying this component adapter/socket

I'm sorting an old collection of electronic components, some of which I don't know what they are used for, like this one: This component is about 7 mm wide. Does anyone recognize this? Thanks in ...
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Build 100-240v Power Adapter

I am trying to power a 5v circuit from any voltage between 100-240v. I know it is possible to do this with a transformerless power supply, but only for a single voltage (e.g. 120v only), but how do I ...
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Why is a laptop power supply output voltage different from its battery?

I hope you will not mind answering. This question has long been on my mind. Normally, the adapter output voltage is higher than that of the battery. In my laptop's case, the output voltage of the ...
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1answer
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Use different adapter for LG 25UM65-p [closed]

My LG monitor (25UM65-P) has original adapter (19V, 1.7Amp), can I use a different adapter (14V, 2.14Amp) for it? Has this any side effects or negative points?
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Is it normal for an unregulated AC/DC Adaptor to provide voltage after unplugging

I have an AC/DC adaptor, as it has variable voltage setting (1.5, 3.0, 4.5, 6, 7.5,9 and 12 V). Voltage readings are larger. For 7.5V setting it provides 12V, for 12V it provides about 18V. So I ...
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What is this adapter and what can I replace it with for simpler operation?

My church plant uses the D3540 pager - https://www.microframecorp.com/d3540-4-digit-wireless-visual-pager-display We have to setup and tear down the pager system every week. We have to manually wire ...
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1answer
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Difficulty sourcing a 6mm dc adapter/plug/converter…any ideas?

I recently bought a second power supply for my laptop. The laptop requires a 330w power supply (it runs a desktop grade CPU), which costs around £120 (Laptop is the Asus GL702ZC). I managed to source ...
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Converting Christmas Village from DC to AC

So this was the year we bought a AC-powered O-gauge Lionel train and a battery-operated village to add to our Christmas tree decor. The problem, the village eats batteries like a kid eats cookies. ...
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242 views

How can I use a US 120 volt Ryobi charger From a 220 volt main? [closed]

I bought a ryobi kit in the us and I want to use it in in Europe. I doubt that I can plug it directly into the socket, what kind of converter/adapter do I need? Is there a way to adapt the charger ...
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In powering household devices, is the voltage preset and the amperage varies as needed?

When powering household devices, does a power adapter have a preset (or in some cases user-defined) voltage, while the device (while turned on) "selects"/draws whatever amount of amperage it needs at ...
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92 views

Is miniaturization of office device A/C adapters feasible?

Today I looked upon my desk: as you can see in the screenshot below, there are three plastic boxes containing A/C adapters for (I think all in the 12-20V and 1-2A range): screen device notebook ...
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3answers
556 views

Replaced 4x AA battery with 6V 3A DC adapter, but device won't work

I'm hoping you smart folks can help me. I'm puzzled by what I thought would be a simple DC battery to DC adapter swap. The device I'm trying to mod is a a microchip activated pet door (SureFlap ...
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1answer
671 views

Electric shock from outdoor security cameras

I just bought this outdoor security camera kit from Amazon. (Amazon product link) When wiring it up, I noticed that I got a small sharp shock when touching the small screws on the metal casing ...
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What is this called? [duplicate]

What is the cylinder on this wire? Is it some kind of adapter or transformer? What purpose does it serve? Why couldn’t it be incorporated into the primary adapter that plugs into the wall at the other ...
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1answer
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Effects of Different AC Adapters On Various Electronics [closed]

Long time programmer starting to learn about electrical engineering a little bit. I have a Raspberry Pi, an Arduino, and various simple projects I've soldered together out of kits and schematics ...
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1answer
421 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 ...
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Difference between these RF adapters

Can someone explain me the differences between these two RF adapters. I know the one on the right is better (and much more expensive as well) but is there a difference in the functioning of these ...
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1answer
75 views

Taking Quizbowl buzzers and connecting to a computer

Recently I Bought quizbowl buzzers from buzzersystems.com and the buzzers i received use an rca cable. If you did not know basically, when you click a button, it sends a signal to a box which ...
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1answer
103 views

Can I use a USA Led Bulb in Europe? [closed]

I am a software engineer working with an IOT company in the states, Right now I am located in Europe for a month and a half, and have some hardware (light bulbs) that I need to use to finish some ...
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2answers
205 views

DIY electromagnet using copper wire and AC adapter

I want to make for some demonstration (caching some paper clips on ON and doping them on OFF) electromagnet made from copper wire (should it be single wire?) with ferromagnetic inside coil: As power ...
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2answers
61 views

How long would the capacitors in an iPhone power adaptor hold potential energy?

I was curious as to whether one could potentially get a shock after touching, with sweaty hands, the prongs of an IPhone power adapter upon unplugging it. If possible, how long would this charge take ...
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102 views

How to replace this connector

My friend accidently stepped on a wire for his light and the tension broke the adapter's connector - I told him I'd try to fix it. I've already cut the connector off and have readied my replacement. I ...
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4answers
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How do AC adapters achieve low current?

The image above shows how a typical AC to DC adapter works, high voltage (230V) at low current is fed into the primary coil and then gets stepped down to a lower voltage with higher current, ...
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1answer
36 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) ...
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0answers
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Is there any standard (or even a de-facto standard) for TRRS to USB? [duplicate]

I've had a few MP3 players that used a single 3.5mm TRRS jack for both connection to earphones and for connection to a USB port (for transferring music files and re-charging the player.) To that end, ...
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1answer
56 views

Is it possible to use a 12V 3,35A power supply to power a 20V 2,5A device? [duplicate]

title says it all.. The device works with that power supply (adapter), but will it make any damage to the device or even worse (blow out or something like that)? thanks
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Why is the 240VAC-12VDC giving both 12VDC and 26VAC as output?

I was using this adapter to power a 12VDC LED strip and felt electric shock from the output wire. When I measured the output with a multimeter, I found both 12VDC and 26VAC on it's output. What could ...
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905 views

Can I use a power strip with max 250v to a 120v power outlet without a converter? [closed]

I'm going to move to Canada from EU. From my research, most people said that if someone from US moves to EU, they'll need a power converter otherwise it might fry the thing. My question is, if I use ...
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94 views

wall warts: constant specified current though universal input voltage?

How come the input drawing current be constant (1.5A) even though it shows that the adapter is universal input (100-240V)? I mean that the power supply voltage varies in different locations still how ...
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How adapters can accept 110-240V but still outputs a constant current

My monitor comes with an adapter , which accepts electricity from wall, ranging from 110V-240V. I am wondering how it could output a same amount of current despite a dynamic voltage?
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1answer
55 views

How do I correctly size a power adapter for a heating element? [closed]

I have a mirror defogger heating element that is intended to be hardwired to a 120V circuit and attached to the back of a bathroom mirror. The heating element says the following -Power supply: 120V/...
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1answer
3k views

Laptop battery and adapter voltage ratings

Considering a 4-cell (laptop) lithium-ion battery, the cell voltages add (since they are in series) to 3.7 V * 4 = 14.8 V. However, the adapter says that it has a 19.5 V DC output. I want to know why ...
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172 views

Hack for connecting two terminal blocks?

If I bought some of these connectors. Is there an easy way to connect two of the green terminal blocks together? i.e. I would end up with a male to male DC adaptor. Could I do this without having ...