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Additional Pictures 

 

Probing the TMS0603 single-chip calculator circuit of a Brother Model 827R (Version 2) calculator.

The Timing Diagram of the TMS0603 single-chip calculator showing activity on the H-Segment output (top)
and Segment Blanking (bottom).





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© Joerg Woerner, May 12, 2024. No reprints without written permission.