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
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 background 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 technology 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).

horizontal rule

If you have additions to the above article please email:

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