Did anyone (at hobbyboards or other) already design a CO concentration meter? (with 1-wire interface, of course).
I'm interested in having and/or designing one.
It seems that the 1-wire patent by Dallas/Maxim has expired at November 5th, 2010.
Does anyone know about any manufacturers that actually are producing/selling 1-wire products since then which was prohibited earlier by the patent?
Specifically the DS2409 is a component which is near...
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