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ac to dc conversions

Discussion in 'Electronic Basics' started by Josh, Mar 10, 2007.

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  1. Josh

    Josh Guest

    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
  2. 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.
  3. Guest

    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
  4. feebo

    feebo Guest

    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.
  5. terryS

    terryS Guest


    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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