Text and Images Copyright (C) 2006, 2007 Mike Sebastian
Like the one-dollar calculators reviewed elsewhere on this web site, finding new scientific calculators for less than five dollars is really an astonishing feat of engineering and manufacturing.
While these 56-function calculators are functionally identical, there appear to be several different manufacturers of the chips. I have been able to find data on the following chips: the Integral IZ1242, the KS6042 (identified as an alternative part number for the Integral chip), and the Silan SC3442.
At left is the die from a DigiTech ATC-828 56-function scientific calculator purchased May 22, 1998 (markings on the back of the calculator indicate it was manufactured May 1997). That particular calculator had a small plastic cap over the die, instead of a blob of epoxy, making it practical to get a picture of the raw die.
I could find no markings on the die to indicate a manufacturer or part number.
|Brand Name & Model||Overall Rating||Display||Keyboard||External Quality||Internal Quality||Purchase||Comments|
|Kenko KK-82LB||fair||good 7 mm||good, rubber keys||good||fair||7/1/06 $2.99||Good value for $3. Cover folds over front to protect the display and keyboard.|
|LeWORLD 2099||good||good 7mm||good, hard plastic keys||good||good||7/6/06 $4.96 Walmart||Good value for $5. Cover folds over front to protect the display and keyboard.|
Last updated February 24, 2007