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Additional Pictures 

 

Keyboard side of the PCB. The 43-pin calculator
chip is an early Toshiba T3603 manufactured in 1977.

The LC-display was manufactured by OPTREX CORP. 
The connection between the LCD and the PCB is done with
small springs instead the later conductive rubber stripe.

The second design of the TI-1750 uses 2 coin-type batteries.


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

Stefan Klaes and Joerg Woerner, December 14, 2002. No reprints without written permission.