I'd like to know if anyone would help me find a design for a power supply that will change a 28v RMS sine wave into 12v dc. Does anyone know if there's a voltage regulator that does a lot of this in a "package"? I'm trying to avoid using too much space and creating too much heat, caused by large capacitors and resistors. I'm currently using a 7812 voltage regulator, which requires that there be no more than 30v applied to it. I can't seem to hook that up directly to the bridge rectifier without the 7812 overheating. Is the 30v max requirement of the 7812 is actually a peak value, not an RMS value? The total current draw of the circuit need be no more than 250mA, so it seems that someone would have made something off the shelf for this type arraingement but I don't know where to look,
Thanks, Rich
Thanks, Rich