DATAMATH  CALCULATOR  MUSEUM

Additional Pictures 

 

The CheckMaster fits neatly into the pockets of a shirt.

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.


If you have additions to the above article please email: joerg@datamath.org.

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