sj said:
About 20 years ago Radio Shack sold an 8-pin chip which produced white noise
and was very simple to use. I have no idea what the part number was. Are
there any similar products available today?
Thanks
It was simply a lengthy shift register with feedback at the right points
so it would continuously cycle through a sequence. The shift register
was long enough so the sequence was long enough, so it provided a pseudo
random output. Clocked at a high enough frequency, the output comes out
like "white noise".
Don Lancaster has some stuff about this in his TTL and CMOS Cookbooks.
I gather the Art of Electronics has some about it too. There has
to plenty of other books that cover it too. Look for something like
"pseudorandom sequence generator".
Michael