Hi p=E5 Dere, I have the GameBoy Oscilloscope. It is quite good really only= usable for AF purposes. I believe it will work on a black & white GameBoy because it= doesn't use colour for its display. If you are considering building it, you may have difficulties obtaining one of the Maxim chips. Maxim are still quoting a 15= week lead time and they've been quoting that since 2000. Future-Active do have it, but they don't seem to respond to non account holders (at least outside the States). I think Elektor have now run out of ready made models. If you're still interested email off list. Ha Det Godt Colin -- cdb, bodgy1@optusnet.com.au on 05/06/2002 -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body