Many circuits can be designed to produce the sound of chiriping birds. Such circuits are used in the door bells and many toys. This circuit provides very interesting sound.Two timer IC 555 are used in the circuit given here. Both the IC s are used here, in the astable mode. Here, the output is not taken from the output pin no.3 of the IC but triangular waveform is received from the junction of the pin no. 2 & 6of the IC. This triangular waveform is given to the control voltage pin no.5 of the IC2 through a resistance R3. Output received from the pin no.3 of the IC2 is given to the speaker through the capacitor C4. The circuit is operated at 6V DC supply.
Many circuits can be designed to produce the sound of chiriping birds. Such circuits are used in the door bells and many toys. This circuit provides very interesting sound.Two timer IC 555 are used in the circuit given here. Both the IC s are used here, in the astable mode. Here, the output is not taken from the output pin no.3 of the IC but triangular waveform is received from the junction of the pin no. 2 & 6of the IC. This triangular waveform is given to the control voltage pin no.5 of the IC2 through a resistance R3. Output received from the pin no.3 of the IC2 is given to the speaker through the capacitor C4. The circuit is operated at 6V DC supply.
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