[sdiy] LFSR digital noise source

Tom Wiltshire tom at electricdruid.net
Tue Nov 12 00:44:13 CET 2019

> On 11 Nov 2019, at 23:01, rsdio at audiobanshee.com wrote:
> The real problem here is all of the overhead required to get it working. A microcontroller doesn’t do anything when you first solder it to a board, or plug it into a breadboard. So, you have to buy a programmer and attach it to your prototype. Even then, you’re not done. You have to write the code, test the code, and iterate. Finally, even after you’ve finished getting all of the software bugs out, the non-volatile memory can forget your program, and you might be back to square one.

Yeah, ok, you have to program a microcontroller, but it’s not exactly onerous, and writing firmware for a simple noise generator is not exactly a huge process either. You could do it in ten or a dozen instructions if you wanted to keep it simple.

When you do, you finish up with something that produces a technically better result than an analog source, reliably, in a single component. Just add 5V.

If your “non volatile” chips are forgetting stuff, you need to buy some better ones ;) Non-volatile should mean exactly that.


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