Carolina, I have no experience with magnetic cards but did resently a job involving a barcode reader. In this project I implemented a TSL215 from TAOS ( http://www.taosinc.com ). It is a 128x1 pixel opto sensor. Connected with a lens you can get a "line picture" of the barcode. The tricky part is exposuretime and then the decoding of the barcode. There are a lot of pages informing you about the barcode specification. One here: http://www.adams1.com/pub/russadam/spec.html Best regards /Bjarne Nebelong -----Ursprungligt meddelande----- FrŚn: Carolina Szwec [mailto:szwec@MONTEVIDEO.COM.UY] Skickat: den 27 november 1999 05:01 Till: PICLIST@MITVMA.MIT.EDU €mne: CARD SLOT READERS??? * Does anyone can tell me where to fin info about Mag-cards / Barcode Cards and how to interface (hard + soft) them to a PIC? * Or, does anyone knows about decoder's chips? * Or does anyone had work with this kind of "toys"?