Comments on: Converting Dc To Ac Current?

By: Leaira

Leaira — Wed, 30 Sep 2009 21:54:48 +0000

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

By: j d

j d — Wed, 30 Sep 2009 20:15:20 +0000

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.

By: charcind

charcind — Wed, 30 Sep 2009 16:50:12 +0000

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.