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Additional Pictures 

 

The sales box of the Datexx DB-413 calculator sold in 2020 in the US.

The Datexx DB-413 in its sleeve with holder for a checkbook and pen.

This Datexx DB-413 was manufactured in 2019 in China.

The Datexx DB-413 calculator is powered by two LR43 batteries.

The printed circuit board (PCB) of the Datexx DB-413 calculator is centered
around a T66L16 single-chip calculator circuit hiding under a small epoxy blob.

Close-up view of the T66L16 single-chip calculator circuit.


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

© Joerg Woerner, January 12, 2020. No reprints without written permission.