Texas Instruments TI-1757 II

Date of introduction:  1983 Display technology:  LCD
New price:   Display size:  8
Size:  4.0" x 2.4" x 0.25"
 101 x 61 x 6.5 mm≥
Weight:  1.8 ounces, 50 grams Serial No:  
Batteries:  2*LR1130 Date of manufacture:  
AC-Adapter:   Origin of manufacture:  Taiwan
Precision:  8 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Marie Lisa Collas

The TI-1757 II "Melody Calculator" added to the similar TI-1755 the capabilities to play own melodies our the "Happy Birthday..." rhyme. 

The music function gives 10 notes of a scale. With 2 notes below the octave and one above you can play simple tunes. Another key allows you to play either flat (b) or sharp (#). This transforms the basic key of C to F and G by flattening the B to Bb in the first case and sharpening the F to F# in the second case. Thus most tunes can be played with a little practice.

The keys are marked Do Re Mi Fa Sol La Si Do etc. 
When the calculator is playing "Happy Birthday" it is impossible to stop it or turn it off! As the individual notes decay it is possible to hear a digitized sound in the background.
John Ashton

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© Joerg Woerner, January 3, 2002. No reprints without written permission.