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Additional Pictures 

 

The TI-30 with the wired DSUB-25 connector. These signals carry the display
information to the Braillotron electronics. 

The electroncis of the Braillotron with dozens of components compared 
to the single-chip calculator circuit of the TI-30.  

From top to bottom:
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Driver for the refreshable Braille cells.

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Additional batteries for the electronics.

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Conversion from the TI-30 display to the Braille patterns.

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Connector to the TI-30.
The refreshable Braille cells. 

An array of small magnets "fire" the pins of each Braille cell. 


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If you have additions to the above article please email: joerg@datamath.org.

© Joerg Woerner, September 29, 2002. No reprints without written permission.