2B-FOUR TUNE SIREN
This project produces four types of sound. Childern use it in their cycles while adults in their cars. This has its special utility in car when it is being reversed or turned back. The circuit has very low current consumption.
TECHNICAL DESCRIIPTION AND WORKING:-
This project has been developed and successfully tested OK in TV Engineer Technical Lab.
This project is a combination of four tune siren sounds. The project employs musical IC UM 3561. This can also serve the purpose of Ambulance siren. The IC UM 3561 is very cheap and works on 3 V DC. The current consumption is 25 mA. One five band rotary switch has been used here to produce different sounds.
The type of Sounds produces by this project are:
- Police Siren 2. Fire Tanker.
- Ambulance Siren 4. Machine Gun.
PRECAUTIONS WHILE ASSEMBLING THE PROJECT:-
- Check all the components as per the circuit.
- Use IC base while mounting IC.
- Check collector , base & emitter of transistor before soldering.
LIST OF COMPONENTS:
- PCB 1
- TRANSISTOR Q1 BEL 187 1
- IC UM 3561 1
- IC BASE 1
R1 330K 1/4W 1
- 5 BAND ROTARY SWITCH 1
- CELL 1.5V 2
- SPST PUSH TYPE 1
- SPEAKER 8E 1