DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-1788
|Date of introduction:||1981||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:||9166539|
|Batteries:||2*LR43||Date of manufacture:||year 1981|
|AC-Adapter:||Origin of manufacture:||Taiwan|
|Precision:||8||Integrated circuits:||NEC uPD1032G|
|Program steps:||Courtesy of:||Joerg Woerner|
TI-1788 combines the clock and alarm-time function
known from the TI-1790 with a simple
4-function calculator in a very small housing but misses the stopwatch. The unusual layout of the
keyboard was corrected with the TI-1788 II introduced only
six month later.
The backside of the calculator reveals another unusual feature - a hidden [POWER] switch.
Dismantling the featured TI-1788 calculator manufactured in 1981 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 calculator brought our attention to a small mark reading CC-31 B, we noticed this mark already with both the KMC 2000 and Radio Shack EC-303 and suspect to locate it with the offspring Privileg LC 6000 and Systema LC1400, too. Similar marks could be found with the TI-1788 II 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.
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© Joerg Woerner, March 5, 2009. No reprints without written permission.