DATAMATH CALCULATOR MUSEUM
|Date of introduction:||1974||Display technology:||LED-stick|
|New price:||$79.95||Display size:||8|
|Size:|| 5.5" x 3.1" x 1.5"
139 x 78 x 37 mm3
|Weight:||6.7 ounces, 190 grams||Serial No:||515423|
|Batteries:||4*NiCd AA||Date of manufacture:||year 1974|
|AC-Adapter:||Origin of manufacture:||Japan|
|Program steps:||Courtesy of:||Peter Muckermann|
The LE-81M seems to be the direct successor of the odd looking LE-81 calculator. It was introduced together with the LE-100 sporting 10-digits and the scientific calculator F-5.
electronics of the LE-81M is centered around a TMC0605 single-chip calculator
circuit developed by Texas Instruments. This design traced back to the TI-2550
introduced January 1974. The display of the LE-81M is a small LED-stick
manufactured by competitor Bowmar.
The rechargeable battery pack of the LE-10 was replaced with a compatible unit holding either 4 AA-sized rechargeable NiCd batteries or standard disposable batteries.
Later - and cheaper - calculators in the LE-line were the LE-83, LE-84 and LE-85.
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© Joerg Woerner, December 5, 2001. No reprints without written permission.