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Additional Pictures 

 

This Sinclair Scientific was manufactured in October 1975 by Sinclair in the United Kingdom.

The double-sided printed circuit board (PCB) of the Sinclair Scientific is centered around a TMC0805
single-chip calculator circuit and supported by two Full-custom chips labeled IFC1 and IFC2.

The keyboard of the Sinclair Scientific calculator with the two metal frames holding the snap discs.

Close-up view of the TMC0805 single-chip calculator circuit.

Close-up view of the IFC1 Digit Full-custom chip.

Close-up view of the IFC2 Digit Full-custom chip.

Close-up view of the Bowmar LED display.




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© Joerg Woerner, December 19, 2021. No reprints without written permission.