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ac to dc conversions

J

Josh

Hi,
I am trying to convert a stereo which uses 12 volts ac current, to run
off of a 9.6 volt dc remote control car battery.

Any help is appreciated
 
C

Charles Schuler

Josh said:
Hi,
I am trying to convert a stereo which uses 12 volts ac current, to run
off of a 9.6 volt dc remote control car battery.

Any help is appreciated

Will probably work if you connect the 9.6 vdc to the output of the power
supply. This will often be between ground and an electrolytic filter
capacitor following the rectifiers.
 
Hi,
I am trying to convert a stereo which uses 12 volts ac current, to run
off of a 9.6 volt dc remote control car battery.

Any help is appreciated

Some more info is needed here. The stereo might be using a half-wave
rectifier running off the AC to give about +/-9V DC inside. Do you
have a model number, a schematic or a picture of the insides of the
stereo?
 
F

feebo

Hi,
I am trying to convert a stereo which uses 12 volts ac current, to run
off of a 9.6 volt dc remote control car battery.

Any help is appreciated

try connecting the battery to the input any way (polarity is not
important as the input is ac)

the battery power will run through one side of the (probable) bridge
rectifier inside. so long as the stereo will run at that level and has
no specific requirement for AC all should be fine - you won't kill it
whatever happens.
 
T

terryS

try connecting the battery to the input any way (polarity is not
important as the input is ac)

the battery power will run through one side of the (probable) bridge
rectifier inside. so long as the stereo will run at that level and has
no specific requirement for AC all should be fine - you won't kill it
whatever happens.

......................................................................................

A comment. A little off topic but might raise a question?

Was in a RS many years ago where an employee was openly 'butchering'
the power supply section of an AC mains operated audio amplifier
wiring in a small 12 volt battery charger/power supply of the type
then used for 'desk' operation of mobile 12 volt CB sets.

I politely asked what he was trying to do and if I could look at the
circuit schematic on the counter! He said he was trying to get the
amplifier to run on 12 volts in his car!

Whereupon I noted that the 60 hertz AC to DC power supply in the
amplifier had +12 volt and -12 volt outputs!

His single 12 volt power supply (only 3 amps maximum) wasn't suitable
and possibly too small anyway! Often wonder what happened to that
piece of equipment!
 
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