DATAMATH CALCULATOR MUSEUM
|Date of introduction:||1977||Display technology:||LCD (yellow)|
|New price:||Display size:||8|
|Size:|| 5.0" x 2.7" x
126 x 68 x 8 mm3
|Weight:||2.5 ounces, 70 grams||Serial No:||1412787|
|Batteries:||n.a.||Date of manufacture:||mth 02 year 1978|
|AC-Adapter:||Origin of manufacture:||Japan|
|Precision:||8||Integrated circuits:||Toshiba T3603|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download leaflet:||(US: 0.6 MByte)||Download manual:||(US: 0.9 MByte)|
Electron Applications Laboratory (TEAL), of Tokyo, Japan introduced in 1977 with the
Teal Photon the world’s first calculator using solar cells instead of batteries.
Please keep in mind that Sharp's EL-8026 Sunman
introduced a few months earlier recharges internal batteries with solar cells
mounted on the back of the calculator housing.
Dismantling this Teal Photon manufactured in February 1978 in Japan reveals a very clean construction based on a Toshiba T3603 single-chip calculator circuit known already from the TI-1750 (2nd design).
It took till 1981 before Texas Instruments entered with the TI-1766 the market of LCD-calculators powered by solar cells.
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© Joerg Woerner, February 15, 2011. No reprints without written permission.