>Sorry about my lag of analogic electronics, but what is a Schottky Diode ?


Also called a 'hot-carrier' diode. Basically it has a very low forward drop
voltage - say around .25 V instead of the normal silicon 0.6 to 0.7 V.  A
very good book is The art of electronics, by Horowitz and Hill, if you plan
to learn anything but basic electronics, especially analogue. It contains
just as much digital electronics knowledge, but no PICs. Still a must have.

Cheers
Roland