Canon Palmtronic LD-10M a.k.a. Palmtronic 10M

Date of introduction:  October 1975 Display technology:  Fluorescent
New price:   Display size:  10
Size:  6.4" x 3.3" x 1.3"
 162 x 84 x 33 mm3
Weight:  6.2 ounces, 177 grams Serial No:  608512
Batteries:  3*AA Date of manufacture:  year 1975
AC-Adapter:   Origin of manufacture:  Japan
Precision:  10  Integrated circuits:  ZA0552
Memories:  1    
Program steps:   Courtesy of:  Peter Muckermann († April 21, 2021)

The Canon Palmtronic 10M, also known as LD-10M, is one of the successors of the LE-series. Compared to the original LE-series using a red LED-Display (Light Emitting Diodes) the later LD-series sports the green VF-Display (Vacuum Fluorescent) and the LC-series either yellow of grey LC-Displays (Liquid-Crystal).

If you feel familiar with this calculator you should compare it with the F-2 and F-6 scientific calculators.

LD-10M_PCB.jpg (50464 Byte)Dismantling the Palmtronic 10M reveals a single-chip calculator circuit based on the TMS1000 Microcomputer family. The ZA0552 found inside the calculator seems to be a member of the TMS1270 and is similar to the calculator circuit of the TI-5200. This chip was later used with the L1010 again.

Don't miss the later LD-10M 2 and LD-10M 3.

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Joerg Woerner, March 3, 2004. No reprints without written permission.