Stylus organ

  

Posted on Jan 27, 2013    11808

IC2 is an audio frequency oscillator. Its frequency is primarily controlled by the resistance between pins 2 and 7. RV4-11 eontrol the oscillator frequency and by touching a stylus (connected via limiting resistor R5 to pin 2) to each preset, different notes can be played. ICl is a low frequency oscillator (approximately 3-10Hz), the frequency of which is variable by RVl


Stylus organ - schematic

The output of this oscillator is connected through depth control RV2 and limiting resistor R3 to the voltage control input of the audio frequency oscillator. Thus a vibrato effect occurs.

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