DATAMATH CALCULATOR MUSEUM
|Date of introduction:||January, 1979||Display technology:||LCD|
|New price:||$23.00||Display size:||8|
|Size:||2.1" x 3.4" x 0.10"|
|Weight:||1.3 ounces||Serial No:|
|Batteries:||CR2016||Date of manufacture:||mth 03 year 1979|
|AC-Adapter:||Origin of manufacture:||Japan|
|Precision:||8||Integrated circuits:||Toshiba T3867S|
|Program steps:||Courtesy of:||Joerg Woerner|
Canon entered with the Palmtronic LC already in 1976 the market of LCD calculators and was about 6 month ahead the first Texas Instruments TI-1750.
In the three years between the original Palmtronic LC-1 and this beautiful LC-7 we noticed some improvements in miniaturization:
|LC-5||1977||CR2025||0.15"||1.7 ounces||Thin rigid|
|LC-6||1978||CR2025||0.15"||1.1 ounces||Thin rigid|
beautiful Palmtronic LC-7 gives once again easy access to the coin shaped
battery through a front door.
The printed circuit board (PCB) of the Palmtronic LC-7 makes use of the Toshiba T3867S single-chip calculator circuit soldered onto a flexible printed circuit board.
About 4 years later credit card sized calculators used solar cells instead of the battery and were glued together to a thin sandwich. Find a typical product with the Canon LS-704.
Don't miss the Casio FIML CARD SL-800,
a real credit card sized calculator with a thickness of only 0.030".
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© Joerg Woerner, February 28, 2004. No reprints without written permission.