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Sharp EL-8

Date of introduction:  November 1970 Display technology:  Fluorescent
New price:  $345 Display size:  8
Size:  6.4" x 4.0" x 2.6"    
Weight:  1 pound 4 ounces Serial No:  11170Y
Batteries:  EL-84 (6*AA NiCd) Date of manufacture:  year 1970
AC-Adapter:  EL-81 Origin of manufacture:  Japan
Precision:  8 Integrated circuits:  Rockwell AC2261, AU2271, DC2266, NRD2256
Memories:      
Program steps:   Courtesy of:  Joerg Woerner

Sharp Electronics Corporation introduced end of the year 1970 the first portable, battery operated calculator. It uses the same technology as the desktop calculator QT-8D. A version without the rechargable batteries was sold later as EL-8A. The next calculator in Sharp's line was the EL-811.

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

The whole calculator is built upon a robust metal chassis that holds the keyboard, display and electronics. EL-8_1.jpg (44486 Byte)
If we remove the keyboard we get a view of the display driver integrated circuits. They are manufactured by Hitachi. The display is made from single tubes with odd segmentation.  

EL-8_PCB2.jpg (50480 Byte)

The display is made from single tubes with odd segmentation.  EL-8_disp.jpg (9492 Byte)
The printed circuit board of the calculator brain shows the famous chip-set developed by US company Rockwell. EL-8_PCB1.jpg (102663 Byte)

 


Read more about Sharp Corporationís Calculator Innovations.


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

© Joerg Woerner, December 5, 2001. No reprints without written permission.