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DC voltage decrease

Discussion in 'Electronic Basics' started by muhaha, May 24, 2004.

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  1. muhaha

    muhaha Guest

    Is there a way to cut the 9V DC supply to 3V without wasting 6V at a regulator ?
    I'm looking for most mAh i can get.

  2. Switching regulators are precisely for this. They do not waste excess
    voltage, but convert one voltage to another, somewhat like a
    transformer does for AC.

    Read the basics here:
  3. babuchemy


    Jul 16, 2009
    Car 12VDC power to 19VDC suitable for laptop charging

    I would like to convert 12 VDC power supply in the cigerette lighter to 19V DC to be able to charge a laptop battery.
    What is the best method to step up?
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