Heathkit IC-2008

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
Precision:  8 Integrated circuits:  TMS1875
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".

IC-2008_1.jpg (75486 Byte)The inside view of the IC-2008 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.

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Joerg Woerner, February 16, 2002. No reprints without written permission.