Hand-held Calculators

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Canon LE-10

Canon LE-10 and charger

The Canon LE-10 beside the charging unit.

Canon LE-10

Distinctive features: Uses rechargeable battery pack, recharged with calculator in a charging unit. The calculator is fitted with a battery-check meter.

Technical details:
Display is 10 digits, red LED.

Main integrated circuits in this example - Texas Instruments TMC1824NC and TMC1825ANC, here date coded to early 1972.

4.8v (sealed battery pack with 4x AA rechargeable cells, see photograph below).

83 x 145 x 38 mm (3.3" x 5.7" x 1.5").

The batteries are recharged by clipping the calculator on the charging unit and securing it with a serrated screw. The calculator is fitted with a battery-check meter.

About 1972.

Made in Japan.

Canon LE-10 on charger
Battery pack

The Canon LE-10 recharging on the charging unit.

Note the battery-check meter at the top left of the keyboard.

The calculator uses a sealed battery pack which slides into the top of the calculator.

Circuit board

With the cover removed showing the two main, Texas Instruments, integrated circuits.
There is another board below with the keyboard and display.

Canon had an agreement with Texas Instruments for the development and production of calculator integrated circuits. The first Canon calculator, the Pocketronic, required 3 large integrated circuits. A year or so later, this model reuires 2 large integrated circuits.

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Hand-held Calculators

TI Cal-Tech
Canon Pocketronic
Sanyo ICC-0081 & ICC-82D
Sharp QT-8B
Busicom LE-120A & LE-120S
Sharp EL-8 & Facit 1111
Minolta Minolcom
Brother PRO-CAL 408
Walther ETR3
Bowmar 901B
Ragen Microelectronic
Compucorp 324G
Sharp EL-811 & derivatives
Royal Digital III & IV
Busicom LE-100A handy
Busicom LE-80A handy
Hewlett Packard HP-35
Canon LE-10
Rapidman 800
Texas Instruments 2500
Lloyd's Accumatic 100
Sinclair Executive
Casio Mini
Sanyo ICC-809
Sharp EL-801
Texas Instruments SR-10
Sperry Remington 661D & 661
Olympia CD 81
apf Mark V
Ramsgate M-11
Olivetti Divisumma 18
Iain Jones International Mini A
Hewlett-Packard HP80
Litronix Checkmate
Heathkit IC-2009
MITS 150
Summit Ko9V, K16 & SE88M
Unicom 102
Victor 85 "Tallymate"
Elka 101
RFT minirex 75
Sharp EL-120
Sharp EL-805
Bowmar MX-55
Atlas-Rand, Berkey, & Keystone
Hewlett-Packard HP-65
Casio fx-10
Calcu-pen
Casio AL-8 & family models
Commodore 776M & 796M
Novus 650 "Mathbox"
Rockwell 8R
General Instrument EZ3000
Check, billfold, wallet calculators
Monte Carlo
Texas Instruments Spirit of '76
Pulsar Calculator Watch
Compuchron Calculator Watch
Adler Lady & Sir
Elektronika B3-18A & C3-15
Speech+
Commodore S61
"Standard Type 1"
Sharp EL-8026
Texas Instruments TI-30
Canon Multi 8
Casio ST1
Wrist Calculators
Kosmos I & Kosmos Astro
Hanimex Calculator-Recorder
Navigation Calculators
TI58 Special Function Calculators
Sandvik 842S Coromant
"Standard Type 2"
Panasonic Electronic Ruler
Teal Photon
Casio Mini Card LC-78
Feet & inches calculators
SCAT Specialist Calculators
Sharp EL-826
Sharp EL-825
Sanyo CX-1
Elektronika MK-33 etc
Sharp PC1211/Tandy TRS80 PC1
Curta
Slide Rule
Otis King L

Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2012 except where noted otherwise.