On 06/07/2011 09:13, Yigit Turgut wrote:
> I had done it with Java in a Siemens C55 about 6 years ago.

I made a reader with a Cassette tape head plugged into an Apple II (with=20
a little analogue electronics) in 1981. Or possibly 1980 or 1982.

I made my own version too by buying blank cards, sticking flat foil coil=20
with centre foil capacitor on top (for 1980s "loop at door" antitheft)=20
and photo-diode + LED on opposite side to cassette head with cover image=20
of shop, empty space for optional peel off price sticker and a plain=20
bars optical track to clock magnetic data. The idea was combo anti-theft=20
and stock control for clothes shops. Computer stock system was too=20
expensive with Pet, TRS80, apple II and especially IBM PC. program on=20
one floppy, all data does fit on 2nd floppy. Custom "database" in=20
Pascal. SQL on a 48K 8bit micro? In your dreams.

Today you don't need NFC or mag stripe cards or even EAN barcode. Simply=20
a set of reusable anti-theft alarm tags with a unique serial number=20
linear barcode. Scan tag with wireless laser reader when tagging item to=20
put it in stock.

You don't need smart two way NFC tags for Retail. The only really useful=20
applications are transport passes (if secure, which most are not) and=20
pet / horse chips.


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