I'm no electrical guru but I do know if you hook 24VDC up to the primary windings of a transformer you'll get zip (0VDC) on the secondary. The only way to get DC through a transformer is to pulse it... i.e. 'invert' the DC to AC then convert back to DC using a regulator... it's a great way to isolate two circuits. Use the inverter link caveman gave ya. You could also use a simple 12V regulator like an LM320-12 if all you want to do is charge your phone... they're about a buck at radio shack.

here a diagram its ruff but I think it explains it.


+24v +12v
to starter ------------- -------------
+ - + - ----------
______________________ ____________________ -------
l l l l -----
l l l l -
l l l l ground
l l l l
-------------------------------- --------------------------

I hope this makes sense, if not post your email and i can send a
better one that i made in photoshop

If you have room for a 12V battery you could use a regulator too keep it charged... then you could run a normal stereo and such.

ok i give up that looks nothing like what i meant it too post your email and i will send one that makes sense.

browningm2(at)hotmail(dot)com

you have mail

thanks! nice drawing

you have mail also

I know Im a Geek [/QUOTE]


Yes, but you solved my problem