DATAMATH CALCULATOR MUSEUM
|Date of introduction:||1977||Display technology:||LCD (yellow)|
|New price:||Display size:||8|
|Size:||5.0" x 3.0" x 0.5"|
|Weight:||4.7 ounces||Serial No:||61265585|
|Batteries:||2*AAA||Date of manufacture:||year 1977|
|AC-Adapter:||EA-17||Origin of manufacture:||Japan|
|Precision:||8||Integrated circuits:||Hitachi HD37001|
|Program steps:||Courtesy of:||Joerg Woerner|
On the first glance this Sharp EL-8024 calculator looks like one of the typical early calculators using the yellow screen LCD introduced with the EL-8020. Nevertheless it is an odd calculator using an external AC adapter together with replacable batteries. We know the uncomfortable AC adapters from the power hungry calculators using LED (light-emitting-diodes) or VFD (vacuum-flourescent-display). But the main advantage of the modern LCD calculators together with calculator ICís in C-MOS technology was the dramatical cut in power consumption. No need for an external power supply in conjunction with the 2 AA-sized batteries.
The following comparision table gives you an idea of the
continues approach in reducing power consumption of simple 4-banger calculators:
|1972||Datamath||LED||P-MOS||6*AA NiCd||3200 mWh||6h||550mW|
|1975||TI-1200||LED||N-MOS||9V PP3||2800 mWh||20h||140mW|
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, March 13, 2002. No reprints without written permission.