Audio and Siren Circuit
Practical with Sound Circuits :
Musical Bell : This Project uses UM66 for Musical notes generation and is amplified with a transistor and gives melody sound with a speaker.
Four Tone Siren : Produces four different sound that is Police siren, Fire engine sound, Ambulance and Machine g un effect with the help of single IC.
FM Transmitter : Simple FM Transmitter Circuit for receiving sound in FM radio. Transmission range is about 30 meters.
Fire Alarm : Simple Circuit for detection of fire. Simple and Mini