Canon LE-81M

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
Precision:  8  Integrated circuits:  TMC0605
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.

LE-81M_PCB.jpg (66806 Byte)The 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.

LE-81M_1.jpg (35656 Byte)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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If you have additions to the above article please email:

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