DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
| This Exactra 20 uses an unique LED display
with only 6 digits and a leading sign position. The small numbers are enlarged by a bubble lense stick.
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| 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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If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, October 17, 2003. No reprints without written permission.
