Thanx
1. as far as i understand will this work. Not that i`m sure it`s realy neccesary i made a test trigger last night and okay a multimeter is perhaps not the most accurate to measure voltage from a piezo but i didn`t get it higher than 0,5 v and okay it goes down to -0,2 well think i put them in just to be sure. a shame they don`t sell the 4851 in dip in germany.
2. Just reading the specs of usb it can drop down to 4v when you put a long cable on it, but i now checked all components musn`t be a problem.
3. 20% is not negligible :) all just a way of perception but than i will order the 18f4620 it`s still cheaper than the 18f452 ..... a whole 45 cents :-) and you get more for less.
4 :-)