17 Dec
2003
17 Dec
'03
11:17 p.m.
The idea: noise from an avalanching diode is applied to the input of an 8 bit shift register. The SR is clocked at some fairly high sampling rate. The 8 bits are made available on the printer port. The shift register and timer probably involves 2 microchips. Why not just use 8 avalanching diodes, one for each bit. Infact, you can use 13 if you use the other printer-port input lines.