Texas Instruments TI-1788 III

Date of introduction:  1984 Display technology:  LCD
New price:   Display size:  8
Size:  3.9" x 2.3" x 0.3"    
Weight:  1.6 ounces Serial No:  10108034
Batteries:  2*LR43  Date of manufacture:  mth 09 year 1985
AC-Adapter:   Origin of manufacture:  Taiwan (C)
Precision:  8 Integrated circuits:  Toshiba T6798S
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (DE, GB: 1.4 MByte)

TI-1788III_1.jpg (10871 Byte)The TI-1788 III combines the clock and stopwatch function known from the TI-1788 II with a currency rate calculator. Compared with the TI-1790 introduced about 6 years earlier size and weight was reduced dramatically. 

TI-1788III_PCB.jpg (49300 Byte)Dismantling the TI-1788 III reveals a single-chip calculator circuit supported only by the display and a small buzzer for the alarm. We know the Toshiba T6798S already from the Canon LC-64T.

TI-1788III_P1.jpg (388478 Byte)The TI-1788 III provides in the pouch even a small table to calculate the time in 19 other time zones. 

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Joerg Woerner, October 10, 2003. No reprints without written permission.