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Additional Pictures 

 

This SR-10 Version 3 was manufactured in May 1975
by Texas Instruments (Date code 205 wk 20 yr 1995).

The double-sided printed circuit board (PCB) of the SR-10 Version 3
is centered around a TMS0120 single-chip calculator circuit.

Close-up view of the TMS0120 (TMS0720) single-chip calculator circuit.

 

Close-up view of the SN75494 Segment Driver.

Close-up view of the SN27931 Support Chip.

Close-up view of the DIS115F Display PCB with 12 individual DISXXX Seven-Segment displays.


horizontal rule

If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, November 18, 2021. No reprints without written permission.