Hi, I have a device that requires 12vac but need to use 12vdc as a
source. Is this possible? I see all kinds of 12vdc inverters around but
they all provide 120\240 vac
....[snip]....

Can it be square-wave AC?

I once built a 12-volt to 120-volt inverter with two transistors, two
resistors, and a 120-to-12 volt transformer that was good for about
40 watts.

You might try using a transformer with two 12-volt windings, but, at
the very least, you could another 120-to-12 volt transformer "backward"
to give you 12volts AC. But it would be square-wave type AC.

--Myron, W0PBV.
--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)