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power supply

T

TR Love

Jan 1, 1970
0
Hi,

I have a roland drum kit that runs on a 9v 1200ma power supply. I also
have a 12v 400amp battery charger pack, with a cigarette adapter.

Is it possible to get a power supply converter to run my drum kit from
the battery pack? I have very limited knowledge and and a bit confused
as to what how and why.

Any pointers to products I can buy would be great. I'm based in the
UK.

TIA

Trevor
 
J

Jan Nielsen

Jan 1, 1970
0
TR Love skrev:
Any pointers to products I can buy would be great. I'm based in the
UK.

If you are looking for a completed solution, I dont think this is the
right group.

If you want to build it yourself, you would get a voltage regulator
rated for your amp usage, and put some caps before and after for a
smooth supply.

/Jan
 
T

Tim Wescott

Jan 1, 1970
0
TR said:
Hi,

I have a roland drum kit that runs on a 9v 1200ma power supply. I also
have a 12v 400amp battery charger pack, with a cigarette adapter.

Is it possible to get a power supply converter to run my drum kit from
the battery pack? I have very limited knowledge and and a bit confused
as to what how and why.

Any pointers to products I can buy would be great. I'm based in the
UK.
I'm not sure if there are any direct step-down converters that'll do
what you want.

Perhaps the safest thing to do is to get an AC converter that'll plug
into the cigarette adapter and generate 220V or whatever you limeys use.
Then plug your drum kit's converter into that. Just make sure that
it's capable of delivering the current that your drum kid adapter wants
(read the label carefully, it'll tell you the AC current requirements --
then buy a converter that'll deliver that much).

It's indirect, it's heavy, it's inefficient, in theory it's more
expensive -- but in practice it'll get you making noise faster, you
won't have to know much about electronics to plug it together, and it
won't run down your battery all that much faster.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Posting from Google? See http://cfaj.freeshell.org/google/

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
 
R

Rich Grise

Jan 1, 1970
0
I have a roland drum kit that runs on a 9v 1200ma power supply. I also
have a 12v 400amp battery charger pack, with a cigarette adapter.

Is it possible to get a power supply converter to run my drum kit from
the battery pack? I have very limited knowledge and and a bit confused
as to what how and why.

Any pointers to products I can buy would be great. I'm based in the
UK.

Go to the other side of google and search on stuff like "dc-dc power
adapters" or "lighter adapter" and so on.

You'll find one eventually.

Be sure that you get one with a current rating greater than or equal
to 1200mA.

Good Luck!
Rich
 
C

Charlie Siegrist

Jan 1, 1970
0
Circa Mon, 04 Jun 2007 03:11:34 -0700 recorded as
<[email protected]> looks like TR Love
Hi,

I have a roland drum kit that runs on a 9v 1200ma power supply. I also
have a 12v 400amp battery charger pack, with a cigarette adapter.

Is it possible to get a power supply converter to run my drum kit from
the battery pack? I have very limited knowledge and and a bit confused
as to what how and why.

Any pointers to products I can buy would be great. I'm based in the
UK.

Whaddyaknow. The first Google hit returned on the search

<9v 1200ma converter>

returned:

<http://shopping.kelkoo.co.uk/b/a/ss_9v_adaptor.html>

Which has at least two devices that will suit you. DC 12V to 9V car
adapters, one at 1200mA, one at 2000. You owe me a pint. :)
 
J

JeB

Jan 1, 1970
0
Hi,

I have a roland drum kit that runs on a 9v 1200ma power supply. I also
have a 12v 400amp battery charger pack, with a cigarette adapter.

Is it possible to get a power supply converter to run my drum kit from
the battery pack? I have very limited knowledge and and a bit confused
as to what how and why.

I'll guess that you can run the drum kit off of the charger pack
directly but I'd check with the manufacturer before trying it.
 
M

Michael A. Terrell

Jan 1, 1970
0
JeB said:
I'll guess that you can run the drum kit off of the charger pack
directly but I'd check with the manufacturer before trying it.


A 400 amp charger is not likely to be filtered OR regulated. Open
circuit, or with that small of a load the output may be over 20 volts of
high ripple DC that would destroy your Roland.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
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