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Additional Pictures 

 

Complete Display and Keyboard Scanning Cycle of the CT5001 from a Unitrex 1200 (Type 27, Rev. 4C) manufactured in April 1972 displaying "-104.679"
and captured with the Digilent Digital Discovery connected to the DCM-50A Platform. MK5011 Clock Frequency at 25 kHz.

Close-up view of the transition between Digit D3 displaying "6" and Digit D4 displaying "4" of the CT5001 showing the Leading and Trailing Digit Blanking Times.


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

© Joerg Woerner, April 5, 2026. No reprints without written permission.