DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
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This Exactra 21 was manufactured
in February 1975 by Texas Instruments
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| The Exactra 21 with its 9-digit Bowmar Opto-Stick
display and costly keyboard.
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| The missing switch
of the keyboard.
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| The double-sided printed circuit board
(PCB) of the Exactra 21.
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| Close-up of
the TMS0803 single-chip calculator circuit.
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If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 30, 2017. No reprints without written permission.
