DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Toshiba LC-833WA
| Date of introduction: | 1978 | Display technology: | LCD (yellow) |
| New price: | Display size: | 8 | |
| Size: | 5.3" x 2.7" x
0.35" 135 x 68 x 9 mm3 |
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| Weight: | 3.0 ounces, 86 grams | Serial No: | D58606 |
| Batteries: | 2*LR44 | Date of manufacture: | year 1978 |
| AC-Adapter: | Origin of manufacture: | Japan | |
| Precision: | 8 | Integrated circuits: | Toshiba T3566 |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
This
calculator seems to be identical to the TI-1790
introduced by Texas Instruments in 1978, too. Main differences are the design
and arrangement of the keys.
It combines a basic calculator, a clock, alarm-time and stopwatch function in a
compact housing. Don't miss the original LC-831W using
two discrete displays for the calculator and clock functions.
A perfect copy of this calculator was sold in the former GDR
(German Democratic Republic - Eastern part of Germany) as MR411
and later MR413. Canon of Japan used similar
hardware in the LC Quartz.
Dismantling
the LC-833WA reveals a clean layout centered around the Toshiba T3566
single-chip calculator circuit, a tiny crystal for the timekeeper and a small buzzer.
Please notice that the shape of the printed circuit board (PCB) is identical
with the TI-1790 and even the layout has only slight differences.
Compare this calculator with the TI-1790.
The keyboard layout was later changed, notice the combined RM/CM key on the LC-834WA.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.