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Sharp EL-8102

Date of introduction:  1974 Display technology:  VFD
New price:   Display size:  8
Size:  6.9" x 4.2" x 1.8"    
Weight:  16 ounces Serial No:  4200172X
Batteries:  6*AA cells Date of manufacture:  year 1974
AC-Adapter:   Origin of manufacture:  Japan
Precision:  8  Integrated circuits:  NEC uPD277C
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Sharp Electronics Corporation introduced end of the year 1969 with the EL-8 the first portable, battery operated calculator. It uses the same technology as the earlier desktop calculator QT-8D. 

This EL-8102 continued the approach of the EL-811 to reduce the complexity of the calculator brain. Instead the former two chip architecture based on Rockwell IC's thisone uses a real single-chip design.

Do get an impression about the internal construction just take your time and watch the next pictures carefully.

The display uses still single tubes but lost the odd segmentation introduced with the EL-8.  EL-8102_disp.jpg (41710 Byte)
The printed circuit board of the calculator uses a single-chip design. EL-8102_PCB.jpg (159073 Byte)

 



You like this housing ? Don't miss the EL-808.

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

© Joerg Woerner, July 22, 2002. No reprints without written permission.