DATAMATH CALCULATOR MUSEUM |
Additional Pictures
This TI-57 manufactured in August 1977 makes use of a BP6 Battery Pack with just to NiCd Cells inside the case.
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This TI-57 manufactured in October 1977 makes use of a BP7 Battery Pack with two NiCd Cells and a step-up converter inside the case.
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The printed circuit board (PCB) of the orginal TI-57 consequently uses a piggy-back PCB with a step-up DC/DC converter. |
The printed circuit board (PCB) of the revised TI-57 omits the additional piggy-back PCB for the DC/DC step-up converter. |
The component side of the PCB of the original TI-57
with the solder connections to the piggy-pack step-up DC/DC converter. |
The component side of the PCB of the revised TI-57
with the unused solder connections from the step-up DC/DC converter. |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, April 11, 2021. No reprints without written permission.