OK, i'd like to know what is a low-leakage diode i have to use in that circuit...
some examples also maybe...?
plus what is the current limiting resistor... what should the value be like?
im new to this.. :P
btw... what mosfets are similar to bs170?
i need to know, cause my local dealer has bs170 N-FET, no mosfet...
http://www.geofex.com/Article_Folders/Mill2extn/mil2plus.htm
The first illustration shows the part numbers/values.
AFAIK, a BS170 is a BS170. It should be fine.
That "N-Fet" you speak of I'm sure is just short for N channel mosfet. For the low leakage diode, RG states to use any plain npn silicon bipolar tranny's collector-base junction.
An even simpler and cheaper low-leakage diode is any 1N400X power diode. (where X = 1, 4, 6, whatever)
Oh yeah, a common replacement for the BS170 is the 2N7000. Only the pin arrangement is different, so it "faces" the opposite way to a BS170.