DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Aurora AC-22 PASSPORT
| Date of introduction: | 1985 | Display technology: | LCD |
| New price: | CAD 19.99 (SRP Oct. 1985) | Display size: | 8 |
| Size: | 4.3" x 2.4" x 0.30" 110 x 60 x 8 mm3 |
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| Weight: | 1.6 ounces, 45 grams | Serial No: | |
| Batteries: | 2*LR54 | Date of manufacture: | mth 08 year 1986 |
| AC-Adapter: | Origin of manufacture: | Taiwan | |
| Precision: | 8 | Integrated circuits: | NEC uPD1834G |
| Memories: | 1 + 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
Aurora entered the market of Checkbook Calculators with the
CB-900 in 1983 and introduced in 1985 with the AC-22
PASSPORT a compact and unique combination of:
| • Account Balancing
Memory with dedicated [CHK] [DEP] [BAL] keys • 30 built-in conversion constants between US/UK Imperial and Metric Units • Free programmable rate conversion between US$ and foreign currency • Percentage and square root function |
Dismantling
the featured AC-22 PASSPORT manufactured in August 19861983 in Taiwan reveals a clean design
centered around a NEC uPD1834G single-chip calculator circuit soldered on a
double-sided printed circuit board (PCB) and powered by two small LR54 (LR1130) batteries.
Inspecting the PCB of this
Autora AC-22 PASSPORT calculator brought our attention to a small mark reading
0151 1834G 01322, most likely a reference to Model 0151
and the NEC uPDNS1834G calculator chip used with the PCB. We compiled a list of the
PCB-Marks we discovered on similar Account Manager calculators.
Learn more about single-chip calculator circuits used in Account
Manager Calculators.
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, March 17, 2020. No reprints without written permission.