Need help with inverter circuit

Discussion in 'Homework Help' started by desoky675, Sep 19, 2011.

  1. desoky675

    Thread Starter New Member

    Sep 18, 2011
    I've been searching for a sine wave inverter,that takes 12 v DC car battery to 220V AC with about 100W power, but all the circuits that I've found has square wave output. I need it to power a computer speekers .

    my first question is , will the square wave be able to pass through the transformer.
    And if it passes , will it be good for the speekers.
    And is there a simple way to produce a full sine wave at the same power rating.

  2. Wendy


    Mar 24, 2008
    Work in progress...

    AC/DC Inverters
  3. Audioguru


    Dec 20, 2007
    Each TIP122 darlington driving the two 2N3055 power transistors produce a voltage loss of about 2V. Then the 12V winding of the transformer gets only 10V peak instead of 12V peak. The 220V output from the transformer will have an average and peak of 183V.
    The much higher peak voltage of the sine-wave from the mains which is 311V.

    But the amplifier of the computer speakers depends on the 311V peak from a sine-wave so the 183V peak (the voltage is much too low) square-wave from the simple inverter probably will not work.