Flickering LEDs

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Postby Panrock » Wed Oct 23, 2013 6:17 pm

The EPROM method might be a go-er and it's good to know assistance could be on tap here - thanks! However the brain is very adept at noticing repeating noise patterns even when the re-cycling period is more than ten seconds - I found this once, when I built a sea shore generator using pseudo-random noise. True random is to be preferred, especially if it can be done with only a few components. More anon.

Steve O
Last edited by Panrock on Thu Oct 24, 2013 7:42 am, edited 1 time in total.
Panrock
Green padded cells are quite homely.
 
Posts: 835
Joined: Mon Feb 05, 2007 8:25 am
Location: Sedgeberrow, England

Postby Panrock » Wed Oct 23, 2013 10:48 pm

This seems to do what I want pretty well... even without a low pass filter.

The input noise (coming from that other circuit + an extra transistor stage) is adjustable and currently about 6v p-p.

When the spike intensity pot is set to greatest intensity, this circuit produces very good narrow band (tunable) 'normal' noise too.


Steve O
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Panrock
Green padded cells are quite homely.
 
Posts: 835
Joined: Mon Feb 05, 2007 8:25 am
Location: Sedgeberrow, England

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