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Texas Instruments TI-1788 II

Date of introduction:  1982 Display technology:  LCD
New price:   Display size:  8
Size:  3.6" x 2.3" x 0.3"
 91 x 57 x 8 mm3
   
Weight:  1.3 ounces, 38 grams Serial No:  82862643
Batteries:  2*LR43 Date of manufacture:  year 1982
AC-Adapter:   Origin of manufacture:  Taiwan
Precision:  8 Integrated circuits:  NEC uPD1032G
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

TI-1788-II_P1.jpg (180687 Byte)The TI-1788 II corrected the unusual keyboard layout of the TI-1788 introduced just a few month earlier. Unfortunately is even this revised layout not very convenient, you hit easily the [CE/C] button and have to repeat your previous calculation!

TI-1788-II_1.jpg (135931 Byte)The backside of the calculator reveals another unusual feature - a hidden [POWER] switch. The calculator was obviously manufactured in Taiwan but we are not able to trace back its roots.

TI-1788-II_IC.jpg (155843 Byte)TI-1788-II_PCB.jpg (169979 Byte)Dismantling the featured TI-1788 II calculator manufactured in 1982 by a non-disclosed Original Equipment Manufacturer (OEM) reveals a very clean design centered around a NEC uPD1032G single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and powered by two small LR43 batteries.

Inspecting the PCB of this TI-1788 II calculator brought our attention to a small mark reading CC-31C-10, similar marks could be found with the TI-1788 and TI-1788 III, the latter manufactured probably by Cal-Comp Electronics. We started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.

The next calculator in this product line added a not only World Time, Calendar and Stopwatch features to the TI-1788 II, but even conversion capabilities. Don't miss the TI-1788 III.



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

Joerg Woerner, April 5, 2008. No reprints without written permission.