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Additional Pictures 

 

The sales box of the Unisonic LC 224CK calculator sold around 1983 in the US.

This Unisonic LC 224CK calculator was manufactured in September 1983 in Taiwan.

The Unisonic LC 224CK calculator is powered by two LR54 (LR1130) batteries.

The printed circuit board (PCB) of the Unisonic LC 224CK calculator is centered
around a Sharp LI3329MT single-chip calculator circuit.

Close-up view of the Sharp LI3329MT single-chip calculator circuit.

Close-up view of the PCB-Mark and jumper of the LC 224CK.




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

Joerg Woerner, January 4, 2020. No reprints without written permission.