CAR REVERSE HOREN PROJECT
101％ working project hello friends today I am gonna telling you about some easy and valuable electronics projects for school and college practical
This car reverse horn can be used with any vehicle having a 12V battery. Transistors T2 and T3 form an astable multivibrator (AMV) that generates beeping tone signals. Medium-power PNP transistor T1 functions as a simple speaker amplifier.BD139 (T4) is an NPN medium-power transistor.
A 5.6V zener diode (ZD1) is connected to its base. ZD1 provides 5.6V DC regulated power supply to the horn circuit built around transistors T1 through T3. Diode D1 functions as reverse polarity protector. 12V DC to the circuit is connected via brake switch of the car/ three-wheeler.
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| Fig1; circuit diagram |
When you reverse your vehicle, the circuit is connected to the battery of the car through the brake switch. The AMV oscillates and produces an audio frequency, which is given to speaker driver transistor T1 to generate a beeping tone. This tone can be altered by changing the values of capacitors C2 through C4 in multivibrator circuit.
Assemble the circuit on a general-purpose PCB and enclose in a suitable box. Con- nect 12V DC power supply to the circuit through the brake switch. When you reverse your car the circuit gets 12V required for its working. Place the cabinet in the vehicle such that it produces sound at the rear while reversing the car..
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why do i have to connect to break switch instead of the reverse switch
ReplyDeleteThis is only a circuit. Through this I have operated the horn. You can operate anything in its place.It's your decision where you use it
DeleteSame question....
ReplyDeleteThis is only a circuit. Through this I have operated the horn. You can operate anything in its place.It's your decision where you use it
Delete