DATAMATH CALCULATOR MUSEUM
|
|
DATAMATH CALCULATOR MUSEUM |
Additional Pictures
|
This early Exactra 21 Prototype was manufactured in March 1974 by Texas Instruments.
|
| The Exactra 21 Prototype with its 8-digit
display using single LED modules.
|
| The double-sided printed circuit board
(PCB) of the early 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, January 4, 2018. No reprints without written permission.
