DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-1775+
|Date of introduction:||1996||Display technology:||LCD|
|New price:||Display size:||8|
|Size:|| 6.1" x 5.3" x 0.5"
156 x 134 x 12 mm3
|Weight:||3.2 ounces, 91 grams||Serial No:|
|Batteries:||LR44||Date of manufacture:||mth 01 year 1997|
|AC-Adapter:||Origin of manufacture:||Thailand (C)|
|Program steps:||Courtesy of:||Joerg Woerner|
Instruments introduced already in 1990 with the original TI-1775
a calculator using a foldable housing. The TI-1775+ added a simple clock to the
basic calculator functionality and matches the styling
of the TI-307+ and TI-2200+.
Dismantling this TI-1775+ manufactured in January 1997 by Cal-Comp Electronics in Thailand reveals a rather simple construction based on an unknown single-chip calculator circuit mounted in Chip-on-Board (COB) technology on a double-sided printed circuit board (PCB) and powered by four small solar cells and a LR44 backup battery for the clock.
Inspecting the PCB of this TI-1775+ calculator brought our attention to a small mark reading CL7-13 and we started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
IIf you have additions to the above article please email: email@example.com.
© Joerg Woerner, February 17, 2003. No reprints without written permission.