> > ** Yep two:
> > 1. The drop out voltage of a standard 12v reg IC is not 12.8 - more like 13.8.
> > 2. The AC supply varies and may be be 10% low on occasion.
> > So, you need a 15VAC tranny.
> > OR you can make a "voltage doubler" supply with two diodes and two electros.
> > That will give about 33V DC - minus the same deductions.
> Thank you - that is helpful in 2 ways: pointing out what I missed &
> was wrong about, and even more helpful is not having to correct my analysis.
** If your 12v tranny is really small, like say 100mA - it will output about 15V to 16v AC off load.
So would do at a pinch with a puny 10mA DC load .