DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-2130
Date of introduction: | 1984 | Display technology: | LCD |
New price: | Display size: | 8 | |
Size: | 5.4" x 4.7" x 0.25" 136 x 120 x 7 mm3 |
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Weight: | 3.6 ounces, 103 grams | Serial No: | |
Batteries: | n.a. | Date of manufacture: | mth 09 year 1985 |
AC-Adapter: | Origin of manufacture: | Taiwan (I) | |
Precision: | 8 | Integrated circuits: | Toshiba T6853BU |
Memories: | 1 | ||
Program steps: | Courtesy of: | Ken Meine |
Texas
Instruments introduced this interesting TI-2130 with a foldable housing already in 1984.
This
approach results in a calculator with the size of a small pocket calculator yet
sporting a keyboard like a
desktop calculator.
Dismantling
this TI-2130 manufactured in September 1985 by
Inventec Corporation in
Taiwan reveals a very interesting approach. Please notice the hinges between the two parts of the housing and the flexible
electrical connection hidden by a black tape between the two printed circuit
boards (PCBs). The later TI-1775
makes use of a much simpler construction.
Inspecting
the PCB of this TI-2130 calculator brought our attention to a small mark reading
O810-02B, we spotted this PCB-Mark already with its near a
identical offspring Technico F-800,
too. We disassembled the Technico F-800
completely to locate a second small PCB-Mark IO800-02D on one
of its PCBs, helping to solve a puzzle.
IO800 obviously refers to Technico (the calculator brand of Inventa Electronics Corporation of Taipei, Taiwan) F-800, while other calculators manufactured by Inventec Corporation like the TI-1775 sport a PCB-Mark like IOTI1775-21A.
• IOXXX: Original Inventec design - brand labeled for Texas Instruments and other companies • IOTIXXX or IOBAXXX: Inventec design exclusively for Texas instruments |
We started compiling a list of the
PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, September 1, 2005. No reprints without written permission.