Found 1 comment on HN
kqr2 · 2012-10-08 · Original thread
Forrest M. Mims' 555 Timer IC Circuits really opened the door for me on what the 555 could do.

http://www.amazon.com/Engineers-Mini-Notebook-Timer-Circuits...

It has since been republished in:

http://www.amazon.com/Timer-Amp-Optoelectronic-Circuits-Proj...

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