Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

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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DIY 24v to 5v usb phone charger

I want to make a adapter from a vehicles 24v to a 5v usb phone charger. Can I simply connect the wires from a cigaret lighter jack to a usb and add a resister in between (using a voltage divider)? If so does it matter how strong the resistors are…
Daniel
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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 the slider to somewhere between 4.5 and 6 in hope…
chuanose
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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 one is just opposite, the output grounded. Why?…
diverger
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PCB Adapter for different signals

I need to use a connector that only exists in a version for PCB installation, but I have to connect it to a cable; so, I was thinking of making a small adapter PCB on which to directly solder the wires. Now my problem is that I have to create this…
Federico Massimi
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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, afterwards it gets rectified to DC and finally a…
rr1303
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Why are UK pins sealed in HK travel adapters?

This Momax USB travel adapter was purchased in HK. I emailed Momax tech support to ask about the UK pins being sealed (as shown in the photo) and received a response saying that it’s in accordance with HK regulations, and if I remove the seal, I’ll…
Feanne
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TQFP-64 to DIL Adapter

I was wondering if someone had a link to a board file for a TQFP-64 to DIL-64. Similar to this: http://www.core.st/projects/AVR32_Starter_Kit/TQFP-48_to_DIL-48_adaptor.pdf, but for 64 pins?
user27949
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input vs output in ac adapters

This is probably stupid, but I have become very confused and would like someone's help. I have brought some equipment from the usa, and these run on 110v. Where I live, I only have 220v. I brought an ac adapter, but became confused with…
Malfunction
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AC DC adapter have the the LED on/off intermittently on ampere measurement

Why does the ON (ready) LED of an AC DC adapter intermittently turn off-on when the digital multimeter is probing its output on ampere measurement, while on DC volt measurement it gives as normally well as it's supposed to be ? Adapter…
user286442
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What type of power adapter barrel is this? DC in 12V 3A negative semi circle positive anker

I cannot find another adapter that fits this specification. (Maybe I do not know the terms.) It is a positive center, DC in: 12V 3A. The device itself is an Anker AH221. I tried to measure the head, and I think it is 1/10th an inch ~2.5mm. The…
Adin D
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Yellow tip polarity

What does the yellow tip on some adapters mean vs the blue or silver
Donna Jean
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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 suspect this might be an unregulated power supply. I…
user211748
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What is this called?

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 end?
temporary_user_name
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Effects of Different AC Adapters On Various Electronics

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 friends have given me. Recently I moved and lost…
shenk
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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-12.5A Positive polarity And I know the output in…
Andrew
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