DATAMATH CALCULATOR MUSEUM |
Additional Pictures
The CheckMaster fits
neatly into the pockets of a shirt.
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The CheckMaster is
powered by six AAA-size batteries. |
The printed circuit board
(PCB) of the CheckMaster makes us of a MK6225N single-chip calculator IC, a display driver, 6 digits of 7-segment LED's
and just 14 keys, Earlier versions used ceramic packages for the MK6225N.
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If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, March 23, 2003. No reprints without written permission.