Description
Minimalistic NE555 design - simple sound generator using only one piezo element (membrane) to generate sound and one potentiometer to change frequency (besides NE555 and battery). Switch can be used to learn Morse code transmission.
Schematics
Piezo transducer acts as capacitor and potentiometer R1 as resistor in simple RC generator. Simultaneously piezo transducer acts as speaker. Frequency can be changed using R1.
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