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Additional Pictures 

 

Complete Display and Keyboard Scanning Cycle of the CT5002 from a Caltronic 812 manufactured in December 1972 displaying "-104.679"
and captured with the Digilent Digital Discovery connected to the DCM-50A Platform. CT5002 Clock Frequency at 40 kHz.

Close-up view of the transition between Digit D3 displaying "6" and Digit D4 displaying "4" of the CT5002 showing the Leading and Trailing Digit Blanking Times.


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

© Joerg Woerner, June 29, 2026. No reprints without written permission.