Experiments in Pulse Tone Synthesis

Inspired by the Oscilloscope Waveform Pictures on the 1-Bit Groove Box website, I programmed the following into my Science Fair Microcomputer Trainer

PULSE01 = 11110001000

 
PULSE02 = 10101111000

 
PULSE03 = 00001111111

 
PULSE04 = 11101100110

 
PULSE05 = 11010101010

 
This is only possible due to the fact that binary LED number three and the trainer’s sound are both triggered from the same pin on the microcomputer chip: toggle the LED on and off and you toggle the speaker on and off…

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