HOTEL KEY CARDS

[gregers]

ive fitted some of these,with different cards for different people and iirc the only thing on the card was the code i set.
we had a few and i had to set them all up using 1 key set card and all others where for each individual lock.
they were bloody expensive and last about 18 mths before we ripped them out coz they kept breaking down.

 

[ColJack]

chip and pin was my idea.... ( or at least the chip on the card bit was.. )

while doing an electronics YTS, I used to do my own projects on a lunch time and after hours ( with the works consent ).

At the request of a work mate ( also on YTS but not as clever as me ), I made several "immobilisers" for his cars.
the first was a simple key code using a dedicated chip, the second was a similar afair but using a PIC so he could have as long a code as he wanted and the ability to use the same number more than once in the code.
the 3rd was the same as the second but included a link to a pager that paged the owner if the code was not entered within 20 seconds.
the 4th was a card reader that worked like the satelite cards ( and now the chip and pin.. ), with a unique etched card for it linking the 12 connections or not.
the 5th included a e²prom chip on the card that contained a unique set of data ( 256KB worth ) so to fill it we put in all sorts of stuff in ascii including name, age, DOB, address, favourite film, and even a short quote from his favourite film.