No. It can't be done with ANY computer. All computers generate precise results, although you can get a pseudorandom result that might satify you. The way most people do it is to amplify the noise of a zener diode operating just at the threshold. Special diodes are created for the purpose. They are called "PINK NOISE" or WHITE NOISE" diodes. They then divide down the pulses and measure the count in a finite period. Good project, tho. --Bob -------------------------- -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.