How to invert 3vdc to 3vac?

I have some 3vac motors for christmas lights that i want to use to turn small mirrored disco balls. I need to invert 3vdc to 3vac for this operation.  I will be using AA batteries and I can series/paralell the batteries to have enough current to operate. Is there an IC that I could use to do this? I want to do many for a wedding and each set will be located on a table. Superbright LED's  will supply the light source for the mirrored balls.

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iceng5 years ago
Still, I would like to see a good pic of that motor.
Did you try to put 3VDC to the motor ?

It probably is a dc motor. 
The only ac motors of the kind described here
are very rare and expensive.

BiggBob2 (author) 5 years ago
Thanks all for trying to answer. I am now looking for some dc motors. Your ideas were good and the responses were of value. Thanks Again.
verence5 years ago
AC - what kind of AC?  Waveform? Rectangle, sine, triangle? What frequency?

Are the 3V peak-peak or RMS?

Did you try to just connect the batteries (DC) to the motors?
iceng verence5 years ago
Aerospaced5 years ago
Well.... yea..sort of.
You will have to generate what is known as a modified sine wave to basically simulate an AC signal. A circuit known as a chopper is quite good at this. Timing is critical in these applications. You may want to get some DC motors instead. I only say this because the batteries will last longer. Converting to AC will create losses.
Otherwise break out your oscilloscope and make an H bridge connected to a 555 for timing and you have a basic inverter.
Nah, these motors are driveable reasonably well with a square wave.
GREAT the chopper would do that nicely!
You don't say how much power these little motors need.

Basically, you can just use a 555 timer to drive 4 transistors, wired in a bridge.