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Converting Dc To Ac Current?

How can I convert DC from a 9V battery into AC, but still be able to fit it onto a small PCB? I have tried googling for an inverter but they are all 12V ones that you plug into a car lighter socket. Please help, thanks!

3 Responses to “Converting Dc To Ac Current?”

1. charcind Says:
   September 30th, 2009 at 4:50 pm

   You don’t say what voltage or frequency AC you want.
   In any case, you need an oscillator, an amplifier of some kind and a transformer. The link shows a circuit like this. You have an oscillator based on the classic 555 chip, two transistors acting as an amplifier, and a small mains transformer wired in reverse.
   The turns ratio of the transformer will determine the output voltage. For instance if you use a 110V in 6V out transformer the output voltage will be 7 x (110 / 6), or about 128V AC.
   Be careful with this. It won’t supply enough current to kill you if you are running from a 9V battery but it WILL give you a nasty shock.

2. j d Says:
   September 30th, 2009 at 8:15 pm

   A lot depends on what you want to use the AC for.. please clarify.
   A 9 volt battery (the small type that fit in radios and such) can only supply a few milliwatts of power. This would not even power a small AC clock radio which needs 1-2 watts.

3. Leaira Says:
   September 30th, 2009 at 9:54 pm

   I don’t think your 9V battery will be able to deliver enough amps to power anything that runs off regular house current.

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