Various sound generator projects is already posted in bestengineeringprojects.com in alarm and sound generator section. Now here is one another sound generator circuit using most popular and versatile operational amplifier IC 741. The circuit posted here is of wind sound generator using IC 741 produces wind sound.
Circuit Description of Wind Sound Generator Using IC 741
The circuit of wind sound generator comprise operational amplifier 741, two NPN transistors (BC148) and some passive components (resistors and capacitors). Transistors T1 and T2 generate wind sound. A jumper is connected to emitter and collector of transistor T1. IC1 is used here as active filter. Output is taken from pin 6 and connected to loudspeaker through coupling capacitor C8. Variable resistor VR1 is used to set the speed of wind. The power supply of 15V DC is given to circuit.
PARTS LIST OF WIND SOUND GENERATOR USING IC 741
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Resistor (all ¼-watt, ± 5% Carbon) |
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R1 = 33 KΩ R2 = 2.2 KΩ R3, R4 = 47 KΩ R5 = 47 Ω R6, R8, R9 = 470 Ω R7 = 2.7 KΩ VR1 = 100 KΩ VR2, VR3 = 22 KΩ VR4 = 10 KΩ |
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Capacitors |
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C1 = 10 µF, 12V (Electrolytic Capacitor) C2 = 1 µF, 16V (Electrolytic Capacitor) C3 – C5 = 0.01 µF (Ceramic Disc) C6 = 3.3 KpF (Ceramic Disc) C7 = 470 µF (Ceramic Disc) C8 = 0.1 µF (Ceramic Disc) |
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Semiconductors |
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T1, T2 = BC148 (General Purpose Silicon NPN Transistor) IC1 = 741 (General Purpose Operational Amplifier) |
i want the circuit explanation please can u send it to me soon
can u send me the circuit explanation please
is there any equivalent transistor of bc148
any normal NPN transistor will probably work ok.:
can u please tell me about 3.3 kpf capacitor and can i use bc108 transistor instead of 148??
3.3 KpF means a capacitor having capacitance of 3300 pico farad i.e. 3.3 nano farad. And you can replace transistor with BC108.
can u please send men the explaination of this circuit and waht is 3.3kpf capacitor means i don’t understand this can u please reply its urgent
can u send me the circuit explanation
send me the circuit operation please