discussion here - http://www.groupdiy.com/index.php?topic=49282.0
pics here - https://picasaweb.google.com/jonte.knif/July212012#slideshow/5767379318368688850
random voltage generator manual & schematic - http://www.jptronics.org/radios/GR/GR1390.pdf
pics here - https://picasaweb.google.com/jonte.knif/July212012#slideshow/5767379318368688850
random voltage generator manual & schematic - http://www.jptronics.org/radios/GR/GR1390.pdf