If you can't order current limiting diodes (2 milliamp) then just put a potentiometer in series with your anode to limit current to 2 milliamps and use any old 24 to 36 volt power supply.
If you insist on reducing ionic to perticle, the instructions are in that file also.
Particle silver being superior to ionic silver because of stomach acid is a bunch of BULL. Don't believe a word of this BS. I have detailed the facts in "Truths & Lies about Colloidal Silver " in this file: http://tinyurl.com/colloidal-silver-resources
Read about the Metalloprotein used to carry ionic silver through the stomach & digestive system. The only effective silver is Ionic Silver.