DATAMATH CALCULATOR MUSEUM
|Date of introduction:||1978||Display technology:||LCD (yellow)|
|New price:||Display size:||8|
|Size:|| 5.3" x 2.7" x
135 x 68 x 9 mm3
|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|
|Program steps:||Courtesy of:||Joerg Woerner|
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: firstname.lastname@example.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.