Arizona CB82 Check Tronic

Date of introduction:  October 18, 1976 Display technology:  LED-stick
New price:   Display size:  8
Size:  6.6" x 3.2" x 0.4"
 168 x 82 x 10 mm3
Weight:  9.5 ounces, 268 grams Serial No:  
Batteries:  9V Date of manufacture:  year 1977
AC-Adapter:   Origin of manufacture:  USA
Precision:  8 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Ken H. Meine
    Download manual:   (US: 1.1 MByte)

Arizona Digital Corporation of Phoenix, AZ announced in October 1976 with the CB82 Check Tronic a Purse Calculator following the idea of the Corvus 525 - better known as CheckMaster - that added basic math functionality to the permanent memory of the calculator to balance your checkbook. The three dedicated keys

[DEP] M+
[CHK] M-

simply add to memory, subtract from memory and display the balance of the memory. 

When not in use the Check Tronic keeps the balance in memory even shut off. Due to the high power consumption of the red LED display the calculator is powered by a 9V battery hiding in the change purse.

About two years later, when low-power CMOS technology was readily available, National Semiconductor introduced with the NS103 Data Checker an electronic record keeper with three continuous memories based on a Mitsubishi single-chip calculator circuit. Early in the Eighties the market took off and a huge variety of calculators appeared on the market with dedicated checkbook functions. Don't miss the TI-1880 Checkwriter, TI-2200, IMA 130CBW, Canon Checkbook and the Radio Shack EC-430. And in 1983 Royal combined with the LCB 835 again a checkbook calculator with a purse.

Learn more about single-chip calculator circuits used in Account Manager Calculators.

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If you have additions to the above article please email:

Joerg Woerner, March 3, 2020. No reprints without written permission.