here is a patent for a silver iontophoresis device. it does really go into some very fine detail and quite frankly most of it is above my head. I have read dr. becker's book too and would love to build such a device, but my electronics skills are severely lacking. if you do try anything in this regards, or get more info, please let me know, i would be very very interested. hopefully you read this message since i am responding quite late to this thread.