Hi all..Some of my questions have been answered so far but decided to start 
over again to see what the group says. I have a Radio Shack 30vdc 1000mA power 
supply that I would like to use but I can change my mind, I have 20" of 12 
gauge silver wire. I know that I don't need 1000mA but around 1 mA  so I need 
to know how I can get that. I would like to drop the voltage down to about 18 
volts as I heard that it is better to use lower voltage. I really wanted 
something that will let me have a constant voltage and milliamps but I figure 
it would drop with batteries. I will need a LED and a resistor but don't know 
if I need a 1000 ohm or a 2000 ohm resistor or what I will need. Any info would 
help. What do others use to make quality CS that they have made that doesn't 
use batteries?  I'm going to use the battery setup but wanted to make a ac to 
dc generator. Thanks..Keithmj