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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18
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4answers
11k views

Cellphone charger has no transformer?

I opened up a really tiny mobile phone charger I have, to see how it is designed. The entire "charger" is integrated into a small 2-pin mains plug, 1 x 1.25 x 0.5 inch, that has an USB socket for the ...
3
votes
1answer
7k views

how to convert a Sync-on-green to VGA (seperate sync) signal?

I have a computer (VAXstation 3100/M76), that has a sync-on-green output: red --( green + sync --( blue --( I want to attach that to a standard ...
3
votes
1answer
4k views

What is the proper name or part number of a 12V DC female car adapter with leads?

I've searched hobby sites like SparkFun, Digikey, BGMicro, and Jameco. I'm starting to wonder if I'm calling this item by the wrong name. What I'm looking for, exactly, is a 12V female car adapter ...
8
votes
1answer
2k views

Determining if a power supply is isolated?

I've been looking for a low cost adapter I can use to power some electronic circuits I'm playing with. Pretty much the only requirement I have at this time is that the adapter is mains isolated for my ...
3
votes
1answer
207 views

Can I power an interactive 'live' wall with copper tape and a 15v ac adapter?

I'm working on a class project to make a living wall with LEDs, paint, and copper tape spiral magnet speakers. I have a 15v ac adapter to power the wall and copper tape to connect the LEDs in parallel ...
-2
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3answers
7k views

Use a 12 volt bulb in 110 AC socket? [closed]

If I were go get this light bulb (with the following specs). Would there be a way to use it in a standard U.S. light socket? ...
1
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1answer
2k views

110V AC/ 9V AC power adapter (America) Vs. 220V AC/ 9V AC power adapter (Europe) [duplicate]

Possible Duplicate: Choosing power supply, how to get the voltage and current ratings? I have a device that I brought to Europe from America. It has a 110V AC/ 9V AC power adapter that stopped ...
1
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1answer
2k views

9v AC 2000mA power adaptor for a 9v AC 1000mA device [duplicate]

Possible Duplicate: Choosing power supply, how to get the voltage and current ratings? I need to replace a 9v AC 1000mA adapter for a 9v AC 1000mA device but all I've been able to find is a 9v AC ...
0
votes
1answer
1k views

Can I use 16V power adapter for scanners that need 12V? [duplicate]

Possible Duplicate: Choosing power supply, how to get the voltage and current ratings? Will they be damaged? The two HP deskjet 2400 and 4300C scanners need 12V, 1.25A as I read. I only have a ...
4
votes
1answer
902 views

Connect two Ac to Dc adaptors in series

I have a modem with a rating of 10 VDC and 1A but I dont have a adaptor for it. Instead I have two 5VDC and 1A adaptors. Just wanted to know if I connect these adaptors in series would It work ?
0
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2answers
427 views

Current/milliamp rating of adapter versus device requirement [duplicate]

Possible Duplicate: Choosing power supply, how to get the voltage and current ratings? My DC adapter for a cordless mike has broken It' ratings are: Input 230-240V ~ 50Hz 30mA Output 20V 250mA ...
5
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1answer
1k views

Laptop power supplies - why the spectrum of voltages and connectors?

Why do are laptops designed with different Voltage input requirements? Is this just a power requirement consideration, or something more technical? Maybe the lithium battery requirements? (And - for ...
6
votes
1answer
255 views

AC / DC adaptor, unexpected voltmeter reading

I'm planning on using an AC/DC power adaptor to power an Arduino and various devices. Before actually powering up the Arduino with the adaptor I wanted to play with the AC/DC adaptor, as it has ...
-1
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1answer
2k views

Micro-B USB male to 2x Micro-B USB female Y splitter adapter [closed]

I'm looking for the above mentioned splitter. It's like this, but Micro-B USB and like this, but reverse the male/female. By the way, I was able to use my Samsung Galaxy S3 phone with the Samsung MHL ...
1
vote
3answers
394 views

Do switching type AC adaptors limit the current by themselves?

Do switching AC adaptors limit the current they provide to the rate described? I have thought that they do not, and that it simply gets dangerous by overheat, but now I am thinking that they might. ...
1
vote
1answer
396 views

UART adapter to… what is this connector's name?

Any idea of what the connector from the right is named?
4
votes
4answers
889 views

Best way to connect a RS-485 device

I have to control a device with a C++ application (Windows) via RS-485. I'm wondering, which would be the best way to connect it. Should I use a USB-RS485 adapter (which would be the most flexible ...
3
votes
5answers
71k views

acceptable bounds for replacement DC adapter [duplicate]

Possible Duplicate: Chosing power supply, how to get the voltage and current ratings? I've got a broken gadget that is discontinued. The only thing broken is the power supply (verified by my ...
0
votes
2answers
975 views

Laptop Adapter current request [closed]

My Lenovo SL500 AC Adapter has broken and left me without a way to charge my PC. It's Output Specs were the following: 20 V 4.5A (4.5A) 90 W I had another Lenovo AC Adapter for a different PC of ...
-3
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2answers
2k views

5V and +5v charger adapter, What is the difference? [closed]

I am trying to buy a stand-alone charger for my Archos 48 500Gb Internet media player. I think it uses a charger which is Output 5V 2A, but I recently came across a ...
8
votes
4answers
16k views

How to utilize HDMI port on FPGA (basic)

Two questions. I have a Xilinx Spartan 6 FPGA which only has HDMI ins and outs. Is there some sort of guide or pre-written code that I can use to start sending images to the screen? I have no idea ...
0
votes
1answer
169 views

Specs on an AC-DC adapter that has two outputs

I have a custom adapter with 2 outputs that are the same in each output. Based on the below specs what are the outputs of each of the cables coming from my adapter? Input: 100-120V~3A Output:12V-12....
-1
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1answer
51 views

Do I need the battery to be present if notebook connected via Car Universal Laptop Power Adapter? [closed]

I am going for holiday and I want to use my old old Acer. The battery lasts for about 10 mins if not connected to the electricity outlet. If the notebook is connected via Car Universal Laptop Power ...
1
vote
2answers
51k views

Can I replace a power adapter of 1.5A with one of 1A? [closed]

I have a Western Digital external hard drive that uses a power adapter to 12v and 1.5A, and it stopped working. I tried it with a tester and doesn't output any current at all. Can I replace it with ...
0
votes
1answer
2k views

If I try and fix my laptop power adapter can I damage my computer or endanger people? [closed]

I have a CR-48 Chrome laptop adapter. It is bent at the end which plugs into the computer. I have to jiggle it and tip it against a wall to make it charge. My novice understanding is there are two or ...
1
vote
3answers
215 views

DC adapter not supplying current

I'm trying to get .5 A of current from a mobile phone's DC adapter, which is within its rated specifications. I am able to detect a voltage of ~5 V DC between the power and ground wires, so it seems ...
-2
votes
3answers
2k views

Simple voltage/current question about modifying a voltage-regulated adapter

I have a 7.5V, 2A, Radio Shack AC adapter and I need it to be a 7.5V, 1.5A power supply. It has one of those tip-ring style plugs on the DC end that plugs into a device to provide power. I need the ...
7
votes
2answers
68k views

Converting Power/Watts in DC to Power/Watts in AC?

How can we convert Watts in DC to Watts in AC? for e.g A device needs 1A and 12V DC input i.e (1A x 12V = 12 Watts) 12 Watts DC. If we use an AC to DC adapter/converter to generate 1A,12V (12Watts) DC ...
6
votes
3answers
51k views

Is it okay to keep a USB charger plugged into the cigar lighter?

I have a USB micro charging adapter for my smartphone for my car. It is basically a cigar lighter plug that turns into a USB micro plug. When I don’t have my phone connected, and as such don’t want ...
1
vote
2answers
360 views

Powering a DC to DC power supply that came without an adaptor

I bought a mini ATX DC to DC power supply on eBay to use with a motherboard. Unfortunately I did not notice it came without any kind of adaptor. So what I have is basically two wires, red and black, ...
17
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1answer
10k views

How do these new-fangled phone chargers achieve step-down?

There appear to be two kinds of power supply adapters in market. The first/older kinds were such that they were reasonably heavy and had a small transformer inside the adapter itself. The newer ones ...
9
votes
2answers
8k views

How do those 3.5mm stereo to mono adapters work?

I have one of those 3.5mm Female Mini-phone mono to Mini-phone stereo which I was hoping to use for connecting the output of an MP3 player (stereo) to a pillow speaker (mono). But then it occurred to ...
1
vote
4answers
33k views

Friend used a 12V power adapter instead of a 9V adapter without looking. Is my guitar effect pedal wrecked?

Pretty much what the title says. Later I tried a 9V adapter which I brought from home and the pedal isn't releasing any sound. On/off lights are saying it's off. Cables and the 9V adapter from home ...
3
votes
2answers
8k views

Is there an easy way to test if my PS/2 -> USB adapter is passive?

I own a couple of PS/2 to USB adaptor/converter connectors that look like the following: Is there anyway to test if these adapters are passive without disassembling them (or risking damage by ...
13
votes
6answers
54k views

Is it possible to power a cordless drill from wall socket adapter?

I have a dewalt 18V cordless drill. I am wondering if it is feasible to build an adapter that can power the drill from a standard US wall socket? A typical DeWalt drill needs 2.6 amps with no-load. I ...
9
votes
3answers
20k views

Reading and understanding electrical specs on laptop AC adapters

My Dell laptop comes with an AC adapter with the following specs: 65 W Input AC: 100 - 240 V, ~1.5 A, 50 - 60 Hz Output DC: 19.5 V, 3.34 A My HP laptop: ...
3
votes
2answers
1k views

Can I set the slider on my universal adapter between 4.5V and 6V to get 5V?

I have a dehumidifying cabinet which requires 5V 900mA, and I have a universal adapter that is rated at 1000mA 12V, however the slider doesn't have a 5V marking, only 4.5 and 6V. Is it okay to point ...
0
votes
2answers
652 views

Source for a ssop to dip adapter?

I need a prototyping adapter for a ssop 24-pin package. Google turns up plenty of dip adapters for 5-7mm chips, but the chip I have is 3.9mm across the body and 6mm to the tips of the pins. Anyone ...
3
votes
3answers
2k views

Are power supplies for USB drive enclosures required to have UL certification?

I bought a cheap USB hard drive enclosure off eBay. It turns out that the power supply has absolutely no electrical certifications for either the US or EU (no UL, CE marks). Is electrical ...
4
votes
3answers
7k views

How can I plug an arbitrary USB device into two computers?

Ultimately, my goal is to have a "keypad" with between 5 and 10 buttons, where pressing one of those buttons effectively presses some key on two computers simultaneously. In the ideal scenario, the "...
1
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2answers
2k views

Adaptor to use old AT&T / keytronic keyboard with DB9 connector?

I have an old keyboard (circa 1998) with a male DB9, and I'd like to use it on a modern PC with a female PS/2. The keyboard is AT&T branded, Comcode #405748401, FCC ID CIG8AVE03417 Keytronic ...
14
votes
2answers
7k views

Is it normal for DC wall adapter power supplies to provide voltages above the nominal ones?

When I measure a 9V DC wall adapter power supply with a multimeter it shows 11.8V. When connected to my board this voltage lowers to 10V. Is this normal? Should I be afraid of toasting my 1117CD-5.0 ...
9
votes
8answers
7k views

Is it safe to use a DC power adapter that isn't UL Listed or CSA certified?

I picked up a 9V switching DC adapter from SparkFun a while back, but I've been hesitant to use it because it doesn't have any of the usual "safety" approvals that you normally see on power adapters (...
5
votes
5answers
3k views

How to deal with a DC adapter with irregular voltage output?

Background information: I tried hard to get a Schmitt-trigger working, but it kept failing. By accident I figured out, that my AC-to-DC adapter produces a very irregular voltage output (I could hear ...
7
votes
3answers
4k views

Apple Desktop Bus (ADB) to USB Adapter

I have an old Apple keyboard that I would like to use but it uses the ADB bus instead of the newer USB bus. Griffin used to produce a product called the iMate which was an ADB-to-USB converter but ...