Texas Instruments TI-1500 (3rd design)

Date of introduction:  1974 Display technology:  LED-stick
New price:  $69.95 Display size:  8
Size:  5.0" x 2.6" x 1.0"
 126 x 66 x 26 mm3
Weight:  4.9 ounces, 139 grams Serial No:  1500219114
Batteries:  2*AA NiCd Date of manufacture:  wk 22 year 1975
AC-Adapter:  AC9140, AC9900/C Origin of manufacture:  USA
Precision:   Integrated circuits:  TMS0803
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 2.4M Bytes)

TI-1500_2275_BACK.jpg (374048 Byte)ti-1500.jpg (40189 Byte)The second design of the TI-1500 was soon replaced with this revised design. 

TI-1500_2_Disp.jpg (23036 Byte)We noticed again two major changes:

The removable AA-sized NiCd-batteries were replaced
   with a solder-type battery.
The Bowmar Opto-stick was replaced with the cheaper
   LED-stick found in the TI-1200.

The calculator was manufactured at least till spring 1976, we know the serial number 1500544350 manufactured week 13, 1976 in Lubbock, TX.

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If you have additions to the above article please email:

Joerg Woerner, December 5, 2001. No reprints without written permission.