Additional Pictures 


The CheckMaster fits neatly into the pockets of a shirt.

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.


If you have additions to the above article please email:

Joerg Woerner, March 23, 2003. No reprints without written permission.