John Pearson said: > What commonly available transistor can I use in place of a 2n222? How about a PN2222A or MPS2222 Failing that, how about 2N4401, it's like a PN2222A. 2N3904 is faster but less powerful. 2SC945 if you're into Japanese parts. Cheers, Bob -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu