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Car horn, how it works

Car horn, how it works
Car horn, how it works

For sound signaling, all vehicles must have a sound signal. It is sometimes simply necessary to prevent emergencies.

sound signal

The vibration signal is quite common. It consists of a body, a core with a winding, an armature, membranes, a rod, a chopper, a resonator disk, an adjusting screw, a capacitor or a resistor. The sound signal is formed by the coordinated work of all these elements.

The winding of the core is connected to a current source at one end, and connected to the ground through the corresponding button on the steering wheel at the other. A capacitor is connected in parallel with the contacts of the breaker, which prevents them from overheating. The rod goes through the core, to which the anchor, the membrane, and also the resonator disk are attached. In this case, the edge of the armature is placed at the movable contact. When the button is pressed, the circuit is closed - the current is directed to the core winding, which is magnetized and attracts the armature. It must be said that the rod moves along with the anchor and causes the deflection of the membrane. In this case, the armature presses on the moving contact, which opens this chain. The core is demagnetized, and all other parts take their original position. Then the contacts close again, and the currentgoes to the core.

car horn

Thus, while the signal button is pressed, the contacts alternately close and open, and the vibrations of the membrane form sounds, which are regulated by a special screw. With it, you can adjust the magnitude of the oscillatory movements of this membrane. Turning it clockwise increases the volume of the signal, turning it in the opposite direction decreases it.

It is worth noting that the sound signal can be of various types. So, car enthusiasts can use a simple membrane or install a whole system that includes a compressor or musical horns. In addition, there are paired beeps, which are characterized by good sonority and a fairly wide selection.

I must say that in cases where the owner of a car selects a signal, it is worth paying attention to how much current it needs to operate, since these elements with excess power can damage car electronics.

Quite often, owners of Russian cars are faced with a breakdown of the regular signal. This problem can be easily solved by changing the sound system a little.

reversing horn

The sound signal for the car is constantly supplied with a current of 12 V. In VAZ cars there is no relay for the signal, therefore, in the cold season, copper wires and windings deteriorate. To eliminate such breakdowns, it is necessary to unload the contacts and adjust the signal switching circuit. For this purpose, you can put a relay "with an eye" and make contacts.

Shouldnote that a reversing horn or additional sounds can be installed in parallel. You can also apply Turkish designs that allow you to get a low tone of audio signals. At the same time, it must be remembered that when installing them, it is better to use ordinary copper wire lugs, which, in the absence of a special clamp, should be soldered.

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