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Positive and Negitive from single winding.....

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  • Positive and Negitive from single winding.....

    HOW CAN I GET POSITIVE AND NEGITIVE VOLTAGES FROM 1 WINDING????? I have a 24volt transformer rated at 10amps!!! and would love to make a high power amp using this, but am un-aware of a way of getting both the negitive and positive rails required by the amplifiers... BTW I am using 4 LM3886 amp ICs to get either 50watts into 4 channels, 100watts into 2 channels or 200watts into 1 channel, to power my non-existent Sub..
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  • #2
    Assuming that your transformer secondary is single tap (if it's dual tap, just use a full wave bridge with centre tap as 0v).

    Use two half wave rectfiers, but with the polarities are different on each diode. That gets you two half wave rectified voltages of different polarities.


    Rob
    Old Systems retired due to new car
    New system at design/prototype stage on BeagleBoard.

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    • #3
      Ahh, I circuit??? Umm, more info.. :P ha ha.. ya totally lost me when you started using plane english.. Also, will this give me the full voltage output, or only half for positive and negitive???
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      • #4
        I thought you knew about electronics (you're always saying you do). Here is a half wave rectifiier:

        http://www.bluetracker.co.uk/diode2.htm

        Flip the diode and the rectified voltage is opposite polarity. So put two of them together and you can get two half wave rectified voltages (each diode conducts on alternate half-phases of the ac).


        Rob
        Old Systems retired due to new car
        New system at design/prototype stage on BeagleBoard.

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        • #5
          Get a book on basic electronics. Read it. Or just do a damn web search. There are also some great electronics newsgroups. Check out the sci.electronics.* groups.
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