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
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|
|Program steps:||Courtesy of:||Joerg Woerner|
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!
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© Joerg Woerner, December 30, 2014. No reprints without written permission.