DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Canon LC-7
| 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 |
| Memories: | 1 | ||
| 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:
| Model | Introduction | Battery | Thickness | Weight | PCB-Type |
| LC-1 | 1976 | 2*LR44 | 0.45" | 2.4 ounces | Rigid |
| LC-5 | 1977 | CR2025 | 0.15" | 1.7 ounces | Thin rigid |
| LC-6 | 1978 | CR2025 | 0.15" | 1.1 ounces | Thin rigid |
| LC-7 | 1979 | CR2016 | 0.10" | 1.3 ounces | Flexible |
This
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".
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, February 28, 2004. No reprints without written permission.