Quick Question about AC adaptor output

Jimmy Bottlehead

Quick question...

Would using an AC adaptor with 19.5v output destroy a device that should be using an AC adaptor with 12v output?

Thanks.

DublinDilbert

Maybe, maybe not, very hard to say.

What is the output from the AC adapters? Is it dc? What device is being powered.

Even with this information, it's hardto say if it will work without looking at the device in good detail.

Jimmy Bottlehead

DublinDilbert wrote: »

Maybe, maybe not, very hard to say.

What is the output from the AC adapters? Is it dc? What device is being powered.

Even with this information, it's hardto say if it will work without looking at the device in good detail.

The device in question is this set of wireless headphones - the AC adaptor is for the charging station. I simply cannot find the same type of adaptor at 12v that will fit the port.

http://www.sony.co.uk/product/haa-home-entertainment-headphones/mdr-rf810rk

Someone on adverts is selling a 19.5v laptop charger like this:

http://www.getpartsonline.com/pcga-ac19v9-n.html

I'm almost certain the connector will be the same as what I need, I just don't want to blow the charging station.

The reason I can't get a 12v adaptor is because Sony have a specific port connector for their AC adaptors - I've already bought 2 universal chargers, neither of which have a connector which will fit.

Bruthal

Its likely the 19.5 volt laptop charger will be unsuitable. It will maintain its 19.5v output even with a bit of load on it.

It might not be too difficult to get a 12v output adaptor and cut the sony one off the old adaptor if you have it.

Do you have the old adaptor for the headphone charger, and what voltage and millamps is written on it?

Jimmy Bottlehead

robbie7730 wrote: »

Its likely the 19.5 volt laptop charger will be unsuitable. It will maintain its 19.5v output even with a bit of load on it.

It might not be too difficult to get a 12v output adaptor and cut the sony one off the old adaptor if you have it.

Do you have the old adaptor for the headphone charger, and what voltage and millamps is written on it?

I don't unfortunately It got binned.

ligertigon

http://en.wikipedia.org/wiki/Voltage_divider

get a 100k and 63k resistor.

job done

Bruthal

ligertigon wrote: »

http://en.wikipedia.org/wiki/Voltage_divider

get a 100k and 63k resistor.

job done

You believe that will work to supply a load with them two resistors?

The problem anyway, was not supplying 12v, but doing so through a suitable plug.

ligertigon

Use the original plug if you still have it.

Bruthal

ligertigon wrote: »

Use the original plug if you still have it.

Yea, with a suitable power supply. The 100k and 63k divider wont work to supply any current over a few micro amps from 19v.

Jimmy Bottlehead

ligertigon wrote: »

Use the original plug if you still have it.

robbie7730 wrote: »

Yea, with a suitable power supply. The 100k and 63k divider wont work to supply any current over a few micro amps from 19v.

I don't have the original plug, unfortunately.

ligertigon

robbie7730 wrote: »

Yea, with a suitable power supply. The 100k and 63k divider wont work to supply any current over a few micro amps from 19v.

So lower the ratio of resistors, for whatever current you need

Bruthal

ligertigon wrote: »

So lower the ratio of resistors, for whatever current you need

Its not the ratio, its the value that needs to be lowered. Although the ratio of the divider resistors would not be the same for different loads either.

Anyway, its trying to solve a problem that`s not the actual problem.

ligertigon

robbie7730 wrote: »

Its not the ratio, its the value that needs to be lowered. Although the ratio of the divider resistors would not be the same for different loads either.

Anyway, its trying to solve a problem that`s not the actual problem.

Ya, I meant values, but keep ratio the same. the problem is you will need resistors with increased wattage for heat.

The op could hard wire direct without and jack connections?

Bruthal

ligertigon wrote: »

Ya, I meant values, but keep ratio the same. the problem is you will need resistors with increased wattage for heat.

The op could hard wire direct without and jack connections?

I would say the charging station itself could have a lead hard wired into it alright, if it can be opened.

Im not sure what the sony charge socket on the charging station is like, for getting a suitable DC plug. It would be simple enough for a solution to be found for anyone with experience of soldering/electronics etc i would imagine.

Maybe Jimmy can put up a good close up photo of it?

meercat

would this do

http://www.powercity.ie/?par=25-90-A103WH&brands=LLOYTRON

they also have regulated ones higher output ones

Bruthal

meercat wrote: »

would this do

http://www.powercity.ie/?par=25-90-A103WH&brands=LLOYTRON

they also have regulated ones higher output ones

It seems to be more a problem about the type of plug on the adaptor, rather than getting an actual power supply adaptor.

Jimmy Bottlehead

meercat wrote: »

would this do

http://www.powercity.ie/?par=25-90-A103WH&brands=LLOYTRON

they also have regulated ones higher output ones

That's actually the same as the first universal adaptor I bought

I also bought this one:

http://www.lloytronuk.co.uk/llyzc/index.php?main_page=product_info&cPath=183_185&products_id=3916

But neither have a plug that fits

meercat

robbie7730 wrote: »

It seems to be more a problem about the type of plug on the adaptor, rather than getting an actual power supply adaptor.

sorry(must read all of the posts)

perhaps this one
http://www.maplin.co.uk/high-power-multi-voltage-plug-top-power-supply-49063

maplin in blanchardstown must be worth a visit(think peats are back in business too/not sure about blanch though)

maybe radionics
http://radionics.rs-online.com/web/