DATAMATH CALCULATOR MUSEUM |
Additional Pictures
This Exactra 21 was manufactured
in February 1975 by Texas Instruments |
The Exactra 21 with its 8-digit Bowmar Opto-Stick display and costly keyboard. |
The missing switch of the keyboard. |
The double-sided printed circuit board (PCB) of the Exactra 21. |
Close-up of the TMS0803 single-chip calculator circuit. |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 30, 2017. No reprints without written permission.