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Bell generator circuit

2015-01-05 14:57  
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Bell generator circuit
Bell generator’s deep and lingering bell can lead people into a profound mood. As shown in the circuit, AN is clicked to voice “dang” and the sound is prolonged until slowly weakening. R1 and C1 in the figure determine the tone of the oscillator. R1 can choose between the 50K ~ 500K and C1 can choose between 103 and 503.