Re: Sources of randomness

On Fri, 3 Nov 1995, Peter Monta wrote:

I'm puzzled by the implication that thermal noise or avalanche or Zener noise is somehow inferior to noise from radioactive sources. It's not.

How much do the appropriate Zener diodes (it *is* diodes we're talking about, right?) cost? Are these things widely available? (sorry I really don't remember my electronics lessons) How would you get your first two sources? (the thermal and avalanche)