DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Casio CB-80 Checkbook
| Date of introduction: | 1983 | Display technology: | LCD |
| New price: | Display size: | 8 | |
| Size: | 2.8" x
6.2" x 0.3" 70 x 157 x 7 mm3 |
||
| Weight: | 2.4 ounces, 67 grams | Serial No: | |
| Batteries: | CR2025 | Date of manufacture: | year 1985 |
| AC-Adapter: | Origin of manufacture: | Japan | |
| Precision: | 8 | Integrated circuits: | Hitachi HD43570 |
| Memories: | 2+1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
The
Canon Checkbook started the idea of an Account Manager already in
1982 and outdated the Texas Instruments TI-2200
by a few weeks. Casio entered the market of Checkbook calculators in 1983 with
the CB-100 and increased the numbers of memories from three to five. A
less powerful version with only three memories was sold as CB-80.
The
CB-80 Checkbook calculator is powered by a single 3V Lithium battery.
Dismantling
this CB-80 Checkbook calculator manufactured in 1985 in Japan reveals an
interesting
construction centered around a Hitachi HD43570 single-chip calculator circuit.
Learn more about single-chip calculator circuits used in
Account
ManagerCalculators.
Don't miss the Corvus CheckMaster
introduced by Mostek already in 1975. This rare product retains the balance of
your memory even when shut off but uses power-hungry electronics.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, November 30, 2019. No reprints without written permission.