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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102 views

Does an AC-DC adapter draw more current on 110V than while plugged to a 220V supply?

I have a Sony AC 100~240V 0.75-0.4A input and DC 12V 3A output adapter. I connected it to a peltier module that was drawing around 2.9A on both 110V & 220V. Initially I had connected the adapter ...
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545 views

Is there any way to modify the output voltage of a laptop adapter from 18.5V to say 7V or 13.6V?

I have an old 18.6V 6.5A adapter from an old HP docking station. I tried to open the adapter and saw an small pot inside it, tried turning it but the out just remained constant and there was no change....
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68 views

Used one power adapter for 4 devices

Power four circuits from one adapter an output of the adapter is 12v, 3A. Should I use the Extention cables like the daisy chain, Should I make some connection in series after the adapter to get 4 ...
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1answer
660 views

adapter between thicker and thinner AWG wires [closed]

I'd like to connect two different AWG wires, sizes 18 and 24. Preferably made specifically for outdoors underground usage. More to the facts, the 24 AWG is part of a 8-wire CAT 5E cable that I need ...
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2answers
601 views

does a broken or blown ac adapter conduct electricity? [closed]

I had this question in my mind for many days. The main question came to my mind from times ago when I was working on some electronic devices and at that time I had an ac adapter that it had some ...
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1answer
103 views

Help Identifying a Differential Pair-Like Symbol in a Schematic

I am working on an adapter to connect a Xerox Docutech keyboard to a modern computer. This keyboard used a specialized, keyboard/mouse interface that does not have a modern counterpart. I have a ...
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5answers
194 views

Can I do anything to make this electric piano work?

I have an electric piano but I don't have the power supply. It has a barrel connector with a negative tip, and wants 12 VDC, 1.5 A. I have a power supply that is 12 VDC, 2.67 A, but it has a ...
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1answer
150 views

AC adapter and audio interference [closed]

all! First post here. So I have a DDTS-100 audio decoder, for over 10 years, which I have connected to a TV, several consoles, a PC and occasionally other equipment. It's still working fine, except ...
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1answer
58 views

is this 12V power supply functioning properly and will it power my device? [closed]

I have purchased a Rhino 12V DC CCTV Camera Power Adapter. The specs are Input 100-240 VAC, Output 12V DC. I cut off the 2.1mm plug and currently have the Red (Power?) and Black (Negative?) wires ...
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2answers
381 views

SOIC to DIP Adapter - 16-Pin

I bought a IC (AD5933), its mounting Style is SMD/SMT. I would like to do a test with it in the protoboard, however I am confused about the type of adapter. I want to use an adapter that does not need ...
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1answer
130 views

How is this Antenna Plug Type Called?

For a project, I would like to connect a cheap PCB antenna from Molex to a SMA female connector. One of the antenna is this one: Molex 146220-0100: http://www.molex.com/molex/products/datasheet.jsp?...
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332 views

Why does my Brother labeler say both 9.5V and 12V?

First time poster on this SE. Thanks for existing! I have a Brother PT2600 labeler and it says 9.5V DC IN on the adapter socket. I tried with a 9V adapter and it doesn't power on. 0.5V shouldn't make ...
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519 views

SMC vs 10-32 Coaxial Connector

I have a 393B04 PCB specs and a drawing denoting a "10-32 UNF 2A Coaxial Electrical Connector". This is the same than a SMC Connector?. Can i purchase an standard SMC connector which supposedly fits ...
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1answer
4k views

Polarity symbols on universal AC-DC adaptor

I have a universal AC-DC adaptor that has the following symbol by the polarity switch: Is it safe to assume that the top part of the diagram indicates the polarity of the inner surface of the ...
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3answers
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How to wire USB 2.0 to 5-pin CAN [closed]

I Need to connect a USB-cable with a CAN-cable. USB has 4 Pins: VBUS, D-, D+ and GND. CAN has 5 Pins: CAN_SHLD, CAN_V+, CAN_GND, CAN_H, CAN_L. Which wire goes where? edit: I already have a USB-to-CAN-...
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1answer
101 views

110V power adaptor to 220V country [closed]

I have a question concerning a power adapter. I bought a weather station from US but I live in Sweden with EU electric plug 220V. The original power adaptor has the following spec. Input : 120V ...
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1answer
61 views

12VDC power adapter to power Arduino Uno and another device?

I have a RHINO 12VDC power adapter (500mA). My goal is to use this power adapter to power an Arduino Uno and another device that is powered through a DB9 serial cable and takes an input voltage of 6 ...
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1answer
759 views

Connecting an ac-dc adapter and a battery in series [duplicate]

Can we connect a 12v adapter and a 12V battery in series to get a 24V output ?
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1answer
188 views

Studio Mic --> 3.5mm jack not working

I have created a system to plug my studio mic (MXL 990) into my MacBook's 3.5mm headphone jack that consists of the following system: Mic -> AC Power supply for the mic -> 3-Prong microphone cable to ...
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2answers
2k views

10w led getting too much hot [closed]

I am using 10w led & lighting those with 12v dc, but they are getting much too hot. What should I do? I have put those in parallel and am using 12v 2 amp smps adaptor. I am thinking about using ...
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2k views

How to power a scanner light with adapter, not battery?

Sorry for the noobish question. I'm a computer scientist, so my electrical engineering knowledge is of the "don't put fingers in electrical outlet" level. I'd like to know how to power a salvaged ...
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3answers
404 views

2 adapter plugs melting, fire hazard, clueless to why

Any forensic skills here? Trying to figure out if this fire hazard is due to crappy adapter plugs or difference in voltage/hertz in Japan. Got this plug in China (cheaply...) where they use 230V/...
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What AC Adapter should I use to replace 2 AAA batteries on my razor? [closed]

My razor works on batteries (2 AAA batteries to be exact, 1.2V and 600mAh each). The batteries after 3 years of quite a lot of shaving are almost completely dead, but I am used to this razor, can't ...
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Differences between bulky vs compact AC Step Up & Step Down solutions for high power loads?

So, I was considering buying an Electric pressure cooker to use through my global movement. The following advise was given to me. WHY? For safety reasons (meaning, if you want to be certain that ...
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1answer
1k views

Using a laptop charger with the wrong polarity? [closed]

I just bought a replacement charger for my Fujitsu Lifebook AH532, but it seems like it has the wrong polarity. The backside of the laptop has a label saying it should be like this: https://imgur.com/...
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2answers
2k views

What is the purpose of all these resistors and capacitors in this power supply? [closed]

This is the schematic diagram of pa-12 family laptop adapter. I think it is based on flyback topolgy but i have a problem understanding many things in it. Actually, in many circuits in general ...
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2answers
50 views

Is this adapter configuration safe?

Is it safe to touch the ground pin when using this adapter? Edit: just to clarify, it's from a 60w laptop power brick.
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1answer
218 views

MicroSD memory Card to USB

I am searching for a circuit or any technical documentation or interfacing IC to design the MicroSD memory card to USB. I am very well aware of Adapter available in ...
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1answer
586 views

How does a Dual-Port Wall Charger distribute Amperage output?

I recently bought a Dual-Port Wall Charger that has a '3.4A total output'. Assuming the device(s) plugged in are individually capable of charging at 3.4A, is this specifying that a single device ...
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2answers
328 views

4x4mm QFN-16 to 3x3mm QFN-16?

Ok, so I goofed... accidentally spec'd a 4mm footprint for a 3mm real-time-clock-calendar IC. Rather than scrap these boards, I'm thinking of designing a double-sided PCB "adapter" to go from the ...
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1answer
582 views

Can I bypass these two adapters?

Scenario I have a LiPo battery connected to a DC > AC inverter and these two adapters (images below) are plugged into the inverter. Hypothesis Everything runs ...
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2answers
20k views

connecting a hp laptop charger adapter three wire output to a two wire cable [closed]

My laptop charger adapter broke and I a have this other old adaptor in the house. They both have the same voltage(19V) and 1.58A. The first adapter(The one that broke) has three wires (black, white, ...
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1answer
99 views

24 volt 2.2a to 24volt 0.75mA [duplicate]

I just want to know if a 24v 2.2A output power adaptor can be use on a 24v 0.75mA unit? I have not tried it because I'm afraid that it might harm the unit due to a huge difference in Ampere.. I would ...
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2answers
6k views

Wireless 2.4GHz to Bluetooth? [closed]

I've been wondering about this for a while; I have a Wireless 2.4GHz keyboard that requires a USB reciever to catch the signal. How great would it be though if I could use it on my phone, for ...
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1answer
105 views

DC Jack Adapter for 5V 2A Wall Wart

Below is a wall wart with ratings 5V 2A. I'd like to buy a DC adapter of some kind for this wall wart, so I can easily wire things to a circuit or bread board. What is the name of the DC side of ...
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1answer
18k views

Xbox one power adapter wiring - converting it to a 12 volt power supply

Thanks for having a look at my question. I know this may seem like an odd question but here is the history of it. I have a Solidoodle 4 3D printer, Its powered by a knock off xbox 360 brick adapter ...
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1answer
113 views

Powering multiple DC gadget(Routers, switches, RPis etc) using a single smps will be efficient than multiple power supply?

I have multiple DC gadgets (Routers, switches, RPis etc) so obviously multiple DC adapters too. I have two spare ATX SMPS. So I was thinking to modify one SMPS so that I can replace all those adapters ...
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1answer
13k views

Making a [4-Pole TRRS to 3.5mm Stereo & Mic Adapter (Male to 2x Female)] from an iphone headphone splitter jack?

I want an adapter that merges the microphone and earphone 3.5 mm jacks into a single 3.5 mm jack ( basically I want to build the blue adapter thingy): I have an earphone splitter for iphones that has ...
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2answers
448 views

What are the dimensions of US outlet holes? [closed]

I am specifically referring to the standard NEMA 5-15 three hole outlet that is used in North America. What are the dimensions of the holes in the outlets? Surprisingly, I am having difficulty in ...
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1answer
544 views

How to properly connect an old record player output (spade connector, possibly amplified) to an RCA tape deck with built in amplifier? [closed]

I have an old magnavox record console which for some reason the speakers don't seem to get very loud. Tracing the components, I think I can bypass those built in speakers completely and have the ...
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2answers
3k views

AC Adapter gives much more voltage than it's supposed to [duplicate]

Hello! I have this one older AC-DC adapter from Korg (wallwart?)... ...that I have been using for my (guitar) effect pedals for a few years, and I recently found out (when I was doing some ...
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1answer
68 views

DC Voltage stabiliser

I have a fluctuating DC voltage in the range 8.5-9.5V coming out from an adapter. How can I convert it to a stable 9V?
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1answer
881 views

Connecting two DC voltage sources in series

I need a 42 volt DC supply to check a motor. All I have is one 30V DC source and a few rated lower than this. Is it possible for me to connect the 30V source and a 12V source in series to get the ...
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1answer
80 views

Power adapter efficiency standards, any drawbacks?

Supposedly, some new federal regulation is imposing "energy efficiency" standards on small power adapters. How is this going to affect electronics? Are the old types of adapters going away? If so, ...
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1answer
3k views

how to wire a mono audio signal to a 3.5 TRS stereo jack

A small audio project I am doing is producing mono audio right now. To stop annoying my family I added a headphone trs socket as an alternative for the (single) speaker. audio (-) is wired to the ...
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3answers
6k views

Why do laptops need larger transformers than mobile phones?

I was wondering why a laptop power adapter is so huge. Most laptops that I have seen use a ~19V power supply. Using transformer equation, and considering 100 turns in the primary(just an assumption), ...
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1answer
224 views

What AC-to-DC adapter would I need to power two of these battery (3V) powered door contacts at once?

I'm new to electrical wiring. I understand circuits, soldering, and basic wiring in parallel / series but calculating and understanding draw, resistance, etc. is new to me. That being said, I have ...
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4answers
5k views

How can I adapt a 3-pin PC fan connector to a 4-pin connector?

My computer's motherboard uses all four pin fan connectors with no support for speed controlling the older three pin fan connector. The problem is, all the PC fans that I have use a three pin ...
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2answers
703 views

Why a high voltage AC always present in SMPS AC to DC power adapters

I'hv seen every 2 pin SMPS AC to DC adapters shows a little high voltage respective to the ground on the out put, on both + and GND wires(or more if more wires present). This voltage is high enough ...
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3answers
1k views

Is the laptop's power adapter output negative terminal grounded?

Today I find my lenovo laptop power adapter's output negative terminal is not grounded (the input ground terminal is not connected with output negative terminal, measured with DMM). But another old ...