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dc - ac

J

Josh

Jan 1, 1970
0
How to convert 9.6 NiCd battery (DC)
to 12 volt ac, or even something close to 12 volt ac.
Thank you
 
D

Day Brown

Jan 1, 1970
0
How to convert 9.6 NiCd battery (DC)
to 12 volt ac, or even something close to 12 volt ac.
Thank you

How many amps?
 
J

Josh

Jan 1, 1970
0
How many amps?

It is 12 volts ac 2.5 amps - and i want to power it with an rc car
battery rated at 9.6 volts dc 700 mAh, or i could use my other rc car
battery which is 9.6 volts dc 1100 mAh.

Thanks for responding
 
L

legg

Jan 1, 1970
0
How to convert 9.6 NiCd battery (DC)
to 12 volt ac, or even something close to 12 volt ac.
Thank you

Josh,

You are not going to find parts for this around your house.

You should be able to find a screw driver, though. Use this to open up
the device you are trying to power, and figure out what happens to the
original 12V AC. You may find that there is one place in the circuit
that will accept a DC voltage, to function normally.

Once you know what this voltage is, you can develop a battery source
to provide it, fairly easily.

RL
 
J

Josh

Jan 1, 1970
0
Josh,

You are not going to find parts for this around your house.

You should be able to find a screw driver, though. Use this to open up
the device you are trying to power, and figure out what happens to the
original 12V AC. You may find that there is one place in the circuit
that will accept a DC voltage, to function normally.

Once you know what this voltage is, you can develop a battery source
to provide it, fairly easily.

RL

Great - i will look into that. Thank you so much for your help.
 
Josh,

You are not going to find parts for this around your house.

You should be able to find a screw driver, though. Use this to open up
the device you are trying to power, and figure out what happens to the
original 12V AC. You may find that there is one place in the circuit
that will accept a DC voltage, to function normally.

Once you know what this voltage is, you can develop a battery source
to provide it, fairly easily.

RL

Nothing's ever this easy. What if the device uses a half-wave
rectifier to generate a bipolar supply from the AC?
 
H

Homer J Simpson

Jan 1, 1970
0
Nothing's ever this easy. What if the device uses a half-wave
rectifier to generate a bipolar supply from the AC?

The OP doesn't have a clue. And this is really for s.e.repair anyway.
 
D

Donald

Jan 1, 1970
0
Homer said:
The OP doesn't have a clue. And this is really for s.e.repair anyway.
Well, lets ask the OP, Hey OP do you have/know what a volt meter is ??
 
J

Josh

Jan 1, 1970
0
Well, lets ask the OP, Hey OP do you have/know what a volt meter is ??

Yes i do, i have one and have used it many times on many things. I
tried opening the trans. but unfortunately the plastic casing is
sealed - so there is no way to open it without damage.

All i am trying to do is find a cheaper source of converting dc to ac
 
J

Josh

Jan 1, 1970
0
Yes i do, i have one and have used it many times on many things. I
tried opening the trans. but unfortunately the plastic casing is
sealed - so there is no way to open it without damage.

All i am trying to do is find a cheaper source of converting dc to ac


I just dont want to destroy something that works perfectly fine, and i
dont feel like getting a battery in my face either. whats really
strange is that my friend took an ac powered subwoofer and put a 9
volt battery on it to power it. It must be such a low battery amperage
that it doesnt cause an immediate problem - but his battery life sucks
horrendously.
 
J

Josh

Jan 1, 1970
0
I just dont want to destroy something that works perfectly fine, and i
dont feel like getting a battery in my face either. whats really
strange is that my friend took an ac powered subwoofer and put a 9
volt battery on it to power it. It must be such a low battery amperage
that it doesnt cause an immediate problem - but his battery life sucks
horrendously.- Hide quoted text -

- Show quoted text -

I have decided to just buy a car stereo amplifier to do this job.
Thanks for everyones help and ideas
 
E

Eeyore

Jan 1, 1970
0
Josh said:
It is 12 volts ac 2.5 amps - and i want to power it with an rc car
battery rated at 9.6 volts dc 700 mAh, or i could use my other rc car
battery which is 9.6 volts dc 1100 mAh.

We need to know how many amps the amplifiers use, not the rating of the
transformer.

How many watts of audio do you want / need ? How long does it need to last
before recharging ?

Graham
 
H

Homer J Simpson

Jan 1, 1970
0
It is 12 volts ac 2.5 amps - and i want to power it with an rc car
battery rated at 9.6 volts dc 700 mAh

Forget it. Won't work.
 
E

Eeyore

Jan 1, 1970
0
Nothing's ever this easy. What if the device uses a half-wave
rectifier to generate a bipolar supply from the AC?

Pretty unlikely I'd say.

Graham
 
E

Eeyore

Jan 1, 1970
0
Josh said:
All i am trying to do is find a cheaper source of converting dc to ac

You don't need to.

Electronics actually runs on DC.

Graham
 
E

Eeyore

Jan 1, 1970
0
Josh said:
I just dont want to destroy something that works perfectly fine, and i
dont feel like getting a battery in my face either. whats really
strange is that my friend took an ac powered subwoofer and put a 9
volt battery on it to power it. It must be such a low battery amperage
that it doesnt cause an immediate problem - but his battery life sucks
horrendously.

Does the battery life suck even when (a) the sound is quiet or (b) just when
it's quite loud most of the time ?

If (b) you're not going to be able to fix that.

Graham
 
H

Homer J Simpson

Jan 1, 1970
0
Pretty unlikely I'd say.

I have a toy that runs off 4 C cells or a 4 VAC adaptor - it clearly has a
split supply.
 
Pretty unlikely I'd say.

Graham

Maybe. Either way it's not a half-wave rectifier I meant, it's a
voltage doubler, but anyways...
I don't see why it's that unlikely. It's a great way to generate a
bipolar supply.
 
J

jasen

Jan 1, 1970
0
Nothing's ever this easy. What if the device uses a half-wave
rectifier to generate a bipolar supply from the AC?

For audio?

with a 2.5A input it's maximum 30W dissipation, so probably under 15W output,
12V DC is plenty for that.
 
J

jasen

Jan 1, 1970
0
Maybe. Either way it's not a half-wave rectifier I meant, it's a
voltage doubler, but anyways...
I don't see why it's that unlikely. It's a great way to generate a
bipolar supply.

only if you don't mine the ripple.



Bye.
Jasen
 
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