Corvus 400

Date of introduction:  1974 Display technology:  LED-modules
New price:   Display size:  8
Size:  5.0" x 3.0" x 0.9"    
Weight:  3.7 ounces Serial No:  400-110291
Batteries:  4*N cells Date of manufacture:  mth 02 year 1975
AC-Adapter:  6V DC, 750mA Origin of manufacture:  USA
Precision:  8 Integrated circuits:  Mostek MK50282A
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Corvus_400_PCB.jpg (168837 Byte)The Corvus 400 changed during production time it's calculator brain. This one uses a MK50282A single-chip calculator circuit and two digit driver circuits instead the MK50280A. Learn more about Mostek Calculator Integrated Circuits.

With the JCPenney 2310 a colorful sibling of this Corvus 400 was introduced. 

Within some month the four unusual N-batteries were replaced with a standard 9V battery. Don't miss the Corvus 406.

Note: The pictured calculator is a Datacal II market by V.I.P. Programs Co.

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If you have additions to the above article please email:

Joerg Woerner, September 19, 2002. No reprints without written permission.