Mauricio Jancic writes: >Added TAG: > > can I ask you, since english is not my native thongue: Are you >really blind or is just a form of expresion. If you are, how do you >manege to assembly circuit in the breadboard, protoboard or the way that >you call it.? Yes. I really am. I can see bright Sun or photo strobes, really bright lightning and probably nuclear war, but that's about it. I keep a Braille notebook of pin-outs of chips I use in projects and use perforated board and wire-wrap as well as solder connections to connect wires to round component leads. Many chips have a notch or little pin-prick dot at Pin 1 and a number of wire-wrap sockets have something, either a notch, a bobbed corner, or maybe even a logo stamped in to the plastic on the Pin1 end. The two most important things are to be sure to keep all the IC's in carefully-marked boxes or their shipping tubes because they sure all look the same to me when I don't know what they are. The one monster I haven't even begun to tame is the surface-mount technology. One can use a wire-wrap pin nest and socket if such a thing can be found for a given chip, but they are _EXPENSIVE_ and only practical for large IC's. A lot of those surface-mount parts feel like grains of sand to me. I know I must make PIC's work for the same reason that anyone involved in electronics wants to use them. Less packaging, smaller projects, and greater ease of duplicating the same circuit if one needs to. Also, for me, documentation of what I did can be put right in to the PIC program in the form of comments and stored for later use if necessary. Your English is much better than my Spanish and Spanish through the speech synthesizer I presently use doesn't come out right because the synthesizer expects English rules so I have to slowly spell out Spanish words to work my way through a Spanish message. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.