DATAMATH CALCULATOR MUSEUM
backside of the SR-40 Prototype with the Serial Number 0000030.
|The printed circuit board
(PCB) of the SR-40 is similar to the later SR-16
Please notice the different arrangement of the battery contacts,
the TMS1111 single-chip calculator circuit and the small coil
of the power supply.
|Close-up view of the
TMS1111 single-chip calculator circuit.
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© Joerg Woerner, March 13, 2013. No reprints without written permission.