Only one line for 12 buttons ... without polling !!!
see here : http://www.edn.com/contents/images/33105di.pdf
Alain
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Only one line for 12 buttons ... without polling !!!
see here : http://www.edn.com/contents/images/33105di.pdf
Alain
I came across another circuit, Same concept, this one built
around a 74HC14 Schmitt inverter. Just FYI
http://www.elecdesign.com/Articles/P...ArticleID=1869
ML