DATAMATH CALCULATOR MUSEUM
|Date of introduction:||March 1972||Display technology:||Panaplex II|
|New price:||$139.95||Display size:||8|
|Size:||10.3" x 6.2" x 3.5"|
|Weight:||3 pounds 1 ounces||Serial No:||Production batch 1234|
|Batteries:||Date of manufacture:||1972|
|AC-Adapter:||120 V or 240 V||Origin of manufacture:||USA|
|Program steps:||Courtesy of:||Bob McGarrah|
If you know a solder iron you know Heathkit. This US company is known for their electronic hobbyist kits. They sold some electronic calculators like this IC-2008 desktop or the IC-2006 battery operated portable calculator.
The first products based on the single-chip calculator
technology introduced by Texas Instruments. Bob, the owner of this wonderful
IC-2008 calculator discovered the TMS1875 chip never seen before. Comparing the
schematic diagrams of both the IC-2008 and the later IC-2008A
gives an interesting result: The TMS1875 is a member of the TMS0100
family but misses the "Segment driver H output".
The inside view of the IC-2008A gives you a perfect engineered calculator like all Heathkit products. The rare TMS1875 calculator chip is surrounded by a heavy keyboard, three SP-753 planar-gas-discharge displays manufactured by Sperry and the unusual thumbwheel to select the position of the decimal point.
The calculator was soon replaced with the IC-2008A, the differences aren't explored yet.
Other calculators using the single-chip calculator
technology introduced by Texas Instruments were the TI-3000,
Canon L100S and Toshiba BC-0802.
If you have additions to the above article please email: email@example.com.
© Joerg Woerner, February 16, 2002. No reprints without written permission.