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When either of us comes into the room, all we have to do is tap our key fobs on a reader mounted by the door, and the room turns on or off what we normally use. The reader by the door reads the presence or absence of the tags.
The book is only 28 pages, so it’s more of a long tutorial than a book, but it still acts as a good introduction to RFID.
We started out with computers in the 1980s when I began writing articles on the ZX81 and ZX Spectrum for the computer magazines of the time.
I was also commissioned by Mc Graw-Hill to write two books on Z80 programming for the ZX Spectrum, Fran helped to produce the manuscripts for these books.