Also: Random Noise Sources PRELIMINARY Noise Source Experiments A 'Ciphers By Ritter' Page Terry Ritter http://www.ciphersbyritter.com/NOISE/NOISRC.HTM Jim ----- Original Message ----- From: "Jon Baker" To: Sent: Thursday, April 18, 2002 5:39 PM Subject: [ee]: random input required Any suggestions for a device.. readily accessible.. preferably cheap that could be attached to a digital input pin which would provide an effectively random input of either 0 or 1? I'm not really a theory person but detecting beta particles for instance would probably be random enough, but a geiger tube is a bit over kill for my application- can a similar thing be done with a transistor? Something like biasing a switching transistor so that it flips randomly between on and off ( although obviously not if its going to oscillate with a regular period) -- Jon Baker -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics