Texas Instruments LOGpit

Date of introduction:  1981 Display technology:  LCD
New price:   Display size:  8
Size:  5.3" x 2.9" x 0.95"
 134 x 74 x 24 mm3
Weight:  3.6 ounces, 101 grams Serial No:  
Batteries:  2*AA Date of manufacture:  wk 45 year 1981
AC-Adapter:   Origin of manufacture:  Italy
Precision:   Integrated circuits:  TP0455/CD4514 or TP0456/CD4564
Program steps:   Courtesy of:  Gerhard Wenzel
    Download manual:   (DE: 3.2M Bytes)

Logpit_1.jpg (37053 Byte)The LOGpit sold in Germany was thought as a calculator for cars. With an integrated timer/clock you could measure your travelling speed, calculate your remaining time to the destination and some other car related calculations. 

Logpit_IC.jpg (38536 Byte)The housing of the LOGpit was similar to the TI-30 LCD with it's huge battery compartment but added a small buzzer for the timer-alarm. Dismantling the LOGpit reveals a small surprise, the electronics of the TI-30 LCD received a small crystal (X-TAL) as a reliable time base for the integrated timer/clock. 

Logpit_2_IC.jpg (37113 Byte)If you are interested in the technology behind the calculator chips developed by Texas Instruments: The CD4564 is one TP0456 designs replacing a faulty TP0455 application. In the meantime we discovered a LOGpit with the original CD4514B chip, please notice the preliminary printing of the chip housing.

Later LOGpit models got a slightly changed coloration.

The model was available in both Englisch, French and Italian lettering named TI-2001 GTI.

Compare this car-computer with an airplane-computer sold by Cessna and the TI-2000 Time Manager.

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If you have additions to the above article please email:

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