DATAMATH CALCULATOR MUSEUM
|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|
|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.|
|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.|
|The display is made from single tubes with odd segmentation.|
|The printed circuit board of the calculator brain shows the famous chip-set developed by US company Rockwell.|
Read more about Sharp Corporationís Calculator Innovations.
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© Joerg Woerner, December 5, 2001. No reprints without written permission.