>From time to time various shiftregister-feedback or other electonic randomizers appears. A quite simple way of generating a quite near white noice (well - pink) is to feed a zener diode with a high value resistor. The zener voltage should be around ¸ Vcc, and R about 1 Meg. Attach a 10 nF capacitor to the Zener, and the other end to an OP Amp - gain 1000 . You will find a rushing noice on the output pin. Depending on your needs, this could possibly be a way of very simply generationg a random noice. Sven Milton -----Ursprungligt meddelande----- FrŚn: Craig Lee Till: PICLIST@MITVMA.MIT.EDU Datum: den 28 maj 1999 17:48 €mne: White noise generator >Speaking of pic sound code, does anyone have code/circuitry examples >for generating white noise, etc. > >I was thinking of using a 12C509 and direct driving an element from >an I/O pin with PWM. Then varying the duty cycle register with a >random number generator. Do I have to vary the frequency too? > >I am new to this synthesis stuff. > >Thanks, > >Craig >