DATAMATH CALCULATOR MUSEUM
|This Exactra 20 uses an unique LED display
only 6 digits and a leading sign position. The small
numbers are enlarged by a bubble lense stick.
|The printed circuit board (PCB)
of the Exactra 20
with the TMS0135 single-chip calculator circuit and
one additional display driver.
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© Joerg Woerner, October 17, 2003. No reprints without written permission.