R8, CR1, and CR2 change the minimum delay from some hundreds of
nanoseconds to 1 second, so the device now provides a pseudo-random
set of delays from 1 second to 15 seconds with a granularity of 1
second.


--
JF

"John Fields" wrote in message
...

R8, CR1, and CR2 change the minimum delay from some hundreds of
nanoseconds to 1 second, so the device now provides a pseudo-random
set of delays from 1 second to 15 seconds with a granularity of 1
second.


--
JF

John.
You must have now done many dozens of these circuits. Be nice to see them
held somewhere as a collection.
Eminently low cost and buildable, with zero chance of obsolescence.
A rare resource.





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Posted via a free Usenet account from http://www.teranews.com

On Sun, 3 Jun 2007 23:25:07 +0100, "john jardine"
wrote:


"John Fields" wrote in message
.. .

R8, CR1, and CR2 change the minimum delay from some hundreds of
nanoseconds to 1 second, so the device now provides a pseudo-random
set of delays from 1 second to 15 seconds with a granularity of 1
second.


--
JF

John.
You must have now done many dozens of these circuits. Be nice to see them
held somewhere as a collection.
Eminently low cost and buildable, with zero chance of obsolescence.
A rare resource.

---
Thanks, John.

I'm working on my web site...


--
JF