DATAMATH CALCULATOR MUSEUM
Privileg SOLAR 31
|Date of introduction:||1984||Display technology:||LCD|
|New price:||Display size:||8|
|Size:|| 4.7" x 4.1" x
120 x 106 x 25 mm3
|Weight:||3.0 ounces, 86 grams||Serial No:|
|Batteries:||n.a.||Date of manufacture:||year 1985|
|AC-Adapter:||Origin of manufacture:||Taiwan|
|Program steps:||Courtesy of:||Joerg Woerner|
Privileg SOLAR 31 calculator look familiar to you?
Dismantling the featured SOLAR 31 manufactured around 1985 by Compal Electronics, an OEM (Original Equipment Manufacturer) in Taiwan, reveals a clean design centered around an unknown Sharp single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and powered by solar cells.
Inspecting the PCB of this Privileg SOLAR 31 calculator brought our attention to a small mark reading SD9-13, most likely a reference to Type Small Desktop 9 and Revision 1.3 of the design (schematics and layout). We spotted this PCB-Mark already with the near identical offspring TI-1795 and started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
Please notice the different sizes of the solar cells used with the SOLAR 31 and TI-1795 despite sporting the same SD9-13 PCB-Mark. Meet Kmart Corporation's KMC 100B - the first born SD9 calculator with Revision 10.
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© Joerg Woerner, March 16, 2020. No reprints without written permission.