DATAMATH CALCULATOR MUSEUM
|Date of introduction:||March 1976||Display technology:||LCD (yellow)|
|New price:||¥7.500||Display size:||8|
|Size:|| 4.3" x 2.6" x 0.3"
109 x 66 x 7 mm3
|Weight:||2.2 ounces, 62 grams||Serial No:||61228406|
|Batteries:||EA-20N (2.4V)||Date of manufacture:||year 1976|
|AC-Adapter:||EA-20C 3V DC||Origin of manufacture:||Japan|
|Program steps:||Courtesy of:||Joerg Woerner|
Excerpt from Sharp Corporation’s Calculator Innovations:
World’s first calculator using
Film Carrier System and yellow LCD. In the same year Sharp introduced the EL-8026,
the first calculator powered by solar cells.
Dismantling this innovative calculator reveals indeed two unusual sights. First, the bottom part of the calculator housing accommodates two small, coin-shaped rechargeable batteries with a connector for the AC adaptor.
Second, after removing the printed circuit board (PCB) from the calculator housing, you'll spot the advertised Film Carrier System. The calculator chip is bonded to a very thin, flexible carrier which is soldered to the Main-PCB. It took at least 10 years before this technology was replaced with the Chip-On-Board (COB) technolgy, still in use in 2010.
A similar calculator to the EL-8020 was introduced one year later with the TI-1750 manufactured by Texas Instruments. Don't miss the EL-8024 featuring a yellow LCD and an external AC adapter.
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© Joerg Woerner, December 21, 2001. No reprints without written permission.