NSC Novus Electronics NS100A Data Checker

Date of introduction:  1982 Display technology:  LCD
New price:  $14.99 (SRP December 1982) Display size:  8
Size:  2.1" x 3.4" x 0.20"
 54 x 86 x 5 mm3
Weight:  1.1 ounces, 30 grams Serial No:  
Batteries:  2*LR54 Date of manufacture:  year 1983
AC-Adapter:   Origin of manufacture:  Taiwan
Precision:  8  Integrated circuits:  NEC uPD1832G
Memories:  1    
Program steps:   Courtesy of:  Ken H. Meine
    Download manual:   (US, FR: 2.1 MByte)

National Semiconductor entered the market of Checkbook Calculators with the NS103 Data Checker in May 1978. It features Account Manager functionality with three permanent (till you remove the batteries) Memories and started a very successful product line. We discovered as of now seven different family members:

1978: National Semiconductor NS103, 3 Memories
1979: National Semiconductor NS107, 2+1 Memories, Credit card size
1980: National Semiconductor NS103A, 3 Memories
1981: NSC Novus Electronics NS103A, 3 Memories
1981: NSC Novus Electronics NS101A, 1 Memory
1982: NSC Novus Electronics NS101A, 1 Memory, Gold
1982: This NSC Novus Electronics NS100A, 1 Memory, Credit card size

Dismantling the featured NSC Novus Electronics NS100A Data Checker sporting just one memory and manufactured in 1983 in Taiwan reveals a clean design centered around a NEC uPD1832G single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) powered by two small LR54 batteries.

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.

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Joerg Woerner, February 5, 2020. No reprints without written permission.