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Additional Pictures 

 

This Unisonic Model 1040-1 was manufactured in December 1977 in Taiwan.

The Unisonic Model 1040-1 calculator is powered by four AAA-size batteries.

The Unisonic Model 1040-1 with its front cover removed.

The printed circuit board (PCB) of the Unisonic Model 1040-1 calculator is centered
around a TMS1044 single-chip calculator circuit.

The Close-up view of the TMS1044 single-chip calculator circuit.

The Close-up view of the FUTABA 9-ST-08A Vacuum Fluorescent Display (VFD).


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

Joerg Woerner, November 13, 2022. No reprints without written permission.