DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Casio MINI CARD LC-79
| Date of introduction: | October 1977 | Display technology: | LCD |
| New price: | Display size: | 8 | |
| Size: | 3.3" x 2.1" x
0.13" 85 x 54 x 3.4 mm3 |
||
| Weight: | 1.1 ounces, 31 grams | Serial No: | 1175283 |
| Batteries: | 2*GOU | Date of manufacture: | year 1979 |
| AC-Adapter: | Origin of manufacture: | Japan | |
| Precision: | 8 | Integrated circuits: | Toshiba T3708S |
| Memories: | |||
| Program steps: | Courtesy of: | Joerg Woerner |
Casio
Computer Co., Ltd introduced with the MINI CARD LC-79 in 1977 a beautiful
calculator with exactly the size of a credit card. While Casio advertised the
calculator as thin as 1.9 mm did we measure actually 3.4 mm including the glass
of the LC-display. Nevertheless an astonishing calculator beaten only two years
later by Sharp's EL-8152.
Dismantling
this Casio LC-79 manufactured in 1979 reveals a very interesting design centered
around a Toshiba T3708S single-chip calculator circuit.
Please
notice the unusual polarity of the two 1.5 V silver oxide batteries, the can is
negative and the center positive!
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 30, 2014. No reprints without written permission.