DATAMATH CALCULATOR MUSEUM |
Additional Pictures
This TI-2550 III (Version 2) was manufactured
in October 1977 by |
The TI-2550 III with its keyplate removed showing only one sliding switch. |
The printed circuit board (PCB) of the TI-2550 III
is centered around a TMS1043 single-chip calculator circuit based on the TMS1000 Family. The small 33pF capacitor soldered to the TMS1043 is probably used to adjust its operating speed. |
Close-up view of the TMS1043 single-chip calculator circuit. |
Close-up
view of the NEC LD8118L Vacuum Fluorescent Display (VFD).
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If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, January 6, 2023. No reprints without written permission.