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Uploaded on Nov 15, 2010
I already had Arduino-based MIDI-controled sythesizer. Now it's time to add some juice to it :-) So i've made almost simplest possible oscillator using 4093 (CMOS logical circuit containing 4 NANDs = 4 possible oscillators) and connected it's power supply to output of Arduino MIDI synthesizer.
In first part you can see 4093 oscillator itself connected to piezo transducer and in second part you can see oscillator working together with Arduino and PC modulating the sound...