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Texas Instruments Little Professor (1985)

Date of introduction:  Jan. 5, 1985 Display technology:  LCD
New price:  $18.95 Display size:  8
Size:  5.3" x 3.3" x 1.3"    
Weight:  3.5 ounces Serial No:  
Batteries:  2*AA Date of manufacture:  wk 43 year 1986
AC-Adapter:   Origin of manufacture:  USA (LTA)
Precision:   Integrated circuits:  CD4570
Memories:      
Program steps:   Courtesy of:  Joerg Woerner

Prof_USA1986_BOX.jpg (566044 Byte)Compared with the early Little Professor with the LED display this one uses a LC-Display to ask the child one of thousands pre-programmed math questions. 

This Little Professor manufactured 1985 looks very similar to the version Little Professor (1982) with a solid brown backround instead this black-red one.


PROF_LTA4386_PCB1.jpg (153047 Byte)Disassembling the Little Professor reveals a cost optimized design combining two key technologies:

Flexible printed circuit board, single-chip calculator circuit, LC-Display 
    borrowed from the TI-50 introduced already June 1978.
Membrane keyboard technolgy introduced with the Speak & Spell in 1980.


PROF_LTA4386_PCB.jpg (69846 Byte)The single-chip calculator circuit Texas Instruments CD4570 is based one the TMS1000 Microcomputer family but added some features known from the TI-55 II

In Europe a version of the Little Professor with normal keys instead the membrane keyboard appeared. Don't miss the Little Professor (1985 Europe).

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If you have additions to the above article please email: joerg@datamath.org.

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