DATAMATH CALCULATOR MUSEUM
|Date of introduction:||April 1970||Display technology:|
|New price:||$395||Display size:||n.a.|
|Size:||8.3" x 3.9" x 1.9"||Printer technology:||Thermal|
|Weight:||1 pound 15 ounces||Serial No:||410383|
|Batteries:||6*NiCd AA + 7*NiCd 2/3AA||Date of manufacture:||year 1972|
|AC-Adapter:||Charger 21||Origin of manufacture:||Japan|
|Precision:||Integrated circuits:||TMC1730, TMC1731, TMC1732, SN21893|
|Program steps:||Courtesy of:||Joerg Woerner|
Today we can assume that the people at Canon Inc. were heavily impressed by the Cal-Tech project started at Texas Instruments in September 1965 and finshed in 1967. Both companies developed together the Canon Pocketronic, the first calculator based on Large-Scale-Integrated (LSI) circuits. A total of three LSI circuits was necessary to do the four basic calculations with numbers of 6 to 12 digits. The production of the calculator was done in Japan but uses a lot of components manufactured by Texas Instruments. Beside the LSI-circuits they delivered the print head of the thermal printer and the transistors. Please note that the paper is running out in a horizontal matter compared to the later vertical style of printing calculators. A nearly identical calculator was manufactured from Canon for Monroe. Explore the rare Monroe 10.
This Canon Pocketronic is the most important calculator in the
histoy of Texas Instruments.
Take your time and enjoy the next 8 pictures.
|A side view of the sleek Canon Pocketronic. The paper runs out from the small slit.|
|Two Thermal Paper Tapes used instead a conventional display.|
|The inside view of the Pocketronic:
|The print head magnified.|
|That's all ? No, this picture doesn't show the three LSI-circuits mounted below of the visible PCB. The visible PCB with the plastic encapsulated IC is only a later correction of some timing signals of the printer head.|
|The bottom shell of the housings holds 6 AA-sized batteries and 7 2/3-AA sized batteries. All are rechargable NiCd style.|
|The back of the calculator gives simple instructions how to use the Pocketronic.|
|The Pocketronic Charger 21 delivered with the calculator.|
One of the PCB's of the Pocketronic changed with time, please find picture of three versions here.
The Pocketronic was later replaced with the Pocketronic II.
The next calculators in Canon's line was the L121 using four instead the three LSI circuits driving a 12-digit Nixie tube display. Withi some month both the desktop model L100 and the the wonderful pocket sized LE-10 appeared.
Don't miss the Sharp EL-8 and Sanyo ICC-82D.
If you have additions to the above article please email: email@example.com.
© Joerg Woerner, December 5, 2001. No reprints without written permission.