Thilo Klein wrote:
> I created a contactless reset switch for the 16F628A. It consists of
> two(to compensate for different light situations) Light Dependent
> Resistors (and two resistors to create a reference) and a comparator
> to compare both.
> 
> Another option is a pushbutton and no LDR.
> 
> I ask you, dear reader, about your pros and cons regarding one option
> compared with the other one.

I went through the same train of thought recently.  Light-sensitive 
pushbuttons are definitely cool.  Ended up using pushbuttons, though. 
Rationale: If there is any chance of a false positive or false negative, 
the classiness of the no-contact approach isn't so classy.
-- 
Timothy J. Weber
http://timothyweber.org
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