DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-15 Explorer
|Date of introduction:|| October 7, 1999
Available: Feb. 2000
|New price:|| $14.99 (SRP 2008)
$19.95 (SRP 2020)
|Display size:||11 +11 characters|
|Size:|| 6.8" x 3.2" x 0.50"
172 x 82 x 13 mm3
|Weight:||4.0 ounces, 112 grams||Serial No:|
|Batteries:||CR2032 (60µA)||Date of manufacture:||mth 10 year 2007 (A)|
|AC-Adapter:||Origin of manufacture:||China (K)|
|Program steps:||Courtesy of:||Joerg Woerner|
first edition of the TI-15 Explorer was
manufactured in China by Nam
Tai Electronics an OEM (Original Equipment
Manufacturer) for Texas Instruments. Starting around 2006/2007 production of the
TI-15 Explorer was shifted - together with its sibling TI-10 - to Kinpo Electronics,
another major OEM in China.
Dismantling this TI-15 Explorer manufactured in October 2007 by Kinpo Electronics in China reveals a clean design centered around an unknown single-chip calculator circuit mounted in Chip-on-Board (COB) technology on a double-sided printed circuit board (PCB) and powered by 4 solar cells and a CR2032 backup battery. Please notice that the TI-15 Explorer manufactured by Nam Tai is using a smaller CR2025 battery. A second PCB is used for the keyboard and connected with a short flat flexible cable (FFC to the Main-PCB. While Nam Tai is using for the keyboard a single-sided phenolic resin PCB, chose Kinpo a more expensive solution based on a double-sided epoxy resin, but could manage to integrate the battery holder, too. We discovered already with the TI-30X IIS completely different designs among the OEMs.
Inspecting the PCB of this TI-15 Explorer calculator brought our attention to a small mark reading SR15T-10-3, we noticed a similar mark already with other Slide Rule calculators manufactured by Kinpo Electronics and 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, January 16, 2009. No reprints without written permission.