DATAMATH CALCULATOR MUSEUM
The Educator® TI-73 Explorer
|Date of introduction:||September, 2006||Display technology:||LCD dot matrix|
|New price:||$295||Display size:||8 * 16 characters|
|Size:||13" x 9" x 1.4"|
|Weight:||32 ounces||Serial No:|
|Batteries:||4*AA||Date of manufacture:|
|AC-Adapter:||Origin of manufacture:||China|
|Precision:||14||Integrated circuits:|| ASIC: TI-REF TI-738X
Display: Toshiba T6K04
|Program steps:||25k Bytes, 128k Bytes FLASH-ROM||Courtesy of:||Joerg Woerner|
California based company Stokes Publishing Company, Inc. distributes under the label
"The Educator®" calculators optimized for teaching purposes. William
T. Stokes filed already July 30, 1991 the US Patent Application U.S.
Pat. No. 5,035,502 with the title "Transparent calculator for overhead
Both the keyboard and the display are made from translucent glass and plastics. Using a simple overhead projector the teacher could demonstrate easily the function of a calculator.
The TI-73 Explorer introduced by Texas Instruments in 2003 developed itself to a very successful graphing calculator. The one to one replacement from Stokes Publishing Company is this Educator TI-73 Explorer overhead calculator.
Educator TI-73 Explorer reveals a great surprise: The printed circuit boards
dramatically changed compared to the TI-73 Explorer and even the 32k Bytes S-RAM
We know a similiar evolution from the TI-83 Plus to the TI-84 Plus with only 3 main Integrated Circuits left:
|Component||Educator TI-73 Explorer|
Z-80 CPU, RAM, USB
512k Byte Flash-ROM
|Display driver||Toshiba T6K04
Single-chip 64*128 pixel
close-up image of the Toshiba T6K04
single-chip driver for dot matrix displays with up to 128 columns and 64 rows mounted on a
tape carrier package.
A close-up image of the TI-738X ASIC and the Spansion S29AL004 Flash-ROM.
We know this technology from TI-82 Stats.fr introduced in July 2006 in France.
Overhead™ Calculator is a trademark of Stokes Publishing Company, Inc.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, November 21, 2007. No reprints without written permission.