DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
| The upper part of the Galixa Piezo housing
holds not tonly the calculator and loudspeaker but even an array of 10 refreshable Braille cells.
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| The Braille cells
use 8 pins per character instead the 6 pins found in the early products.
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One of
the 10 Braille cells.
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| The Braille cells uses an
ASIC with some switching transistors to apply a high voltage of about
200V DC to each of the 8 bending type Piezo actuators. Simply by bending the Piezo stick each of the white plastic pins is moved towards the finger tip of the user.
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If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 22, 2002. No reprints without written permission.
