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
|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|
|Program steps:||Courtesy of:||Ken Meine|
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: firstname.lastname@example.org.
© Joerg Woerner, September 1, 2005. No reprints without written permission.