Now HP Labs have produced a chip that could help build localisers...
The chip, developed by the Memory Spot research team at HP, is 2-4mm square and current versions can hold up to 512 kilobytes of data.Not as cheap as RFID (where arphids are now coming in under 12c a shot), but a lot more capable...
HP said the amount of memory onboard the tiny chip was likely to grow in future versions.
Data can be moved in and out of the chip at speeds of up to 10 megabits per second - far faster than is possible with other short-range radio systems such as Bluetooth or Radio Frequency ID tags.
"This really bridges the digital and physical worlds," said Howard Taub, associate director at HP Labs. "The digital data is attached to the physical object it's related to."
All the components to make the chip, including modem, antenna, microprocessor and memory, can be fabricated as a single unit helping to keep unit costs low. HP speculated that once in production the devices could cost as little as one dollar each.