DATAMATH  CALCULATOR  MUSEUM

Additional Pictures 

 

This rare Speak & Spell "Professor" was manufactured in
1990 by Texas Instruments in China.

The housing of the Speak & Spell "Professor" uses obviously the original mold from a 1980 model.

The inside view of the Speak & Spell "Professor" looks at first glance familiar,
but their are a lot of differences to the western Speak & Spell's to discover.

The electronics of the Speak & Spell "Professor" manufactured in 1990 with the display electronics
on the upper PCB (printed circuit board) and the main electronics on the lower PCB.

The PCB of the Speak & Spell "Professor" manufactured in 1990 is centered
around the TSP50C42 single-chip speech synthesizer. 


horizontal rule

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

Joerg Woerner, August 13, 2010. No reprints without written permission.