Car horn circuit diagram

Photocoupler

The picture below shows the FO car horn, you can try this track and list the components for your car:

R1 = 68K

R2 = 2K2

R3 = 56K

R4 = 3K3

R5, R6 = 4K7

R7 = 10K pot / adjustable potentiometer C1 and C2 = 22nF

Body C3, C5 = 100nF

C4 = 1nF

5233 = 220μF / 25V

IC1, IC2, = 7555 or TS555CN CMOS Timer IC

IC3 = TDA7052

SPKR = 8 ohms

Car speaker circuit description:

This car horn circuit reproduces the sound of contemporary car horns. The main creation of models and toys, but with high-energy output audio power amplifier ICs, can be implemented and further complicated projects.

Circuit operation

In order to get realistic car horn sound, mixing two different timbres is an essential interval, and they will input a small three (music). This can be implemented by two 7555 collective timer unsteady multivibrators and generates a wired integrated circuit square wave 440Hz and 523Hz respectively. These frequencies should be fairly accurate, so the timing resistors need to be wired for two common series of worthy resistors.

The mixed square wave frequency (523Hz) generated by IC1 (440 Hz) and IC2 is shaped by R5 and R6, and is shaped by C3, C4 and R7 in order to obtain a more realistic tone. Eventually, the resulting composite audio signal is sent, which in turn drives the speaker's audio power amplifier IC3. The need for R7 needs to be adjusted to achieve a satisfactory level of output.

Note on car horn circuit:

It may be a speaker of any form and diameter. Of course, this needs to withstand at least 1 watt of energy if the TDA7052 audio amplifier IC is selected.

The TDA7052 integrated circuit is used because it allows for the lowest component count and very good features. You want to use a unique audio power amplifier IC that can pick much less effective, but find the LM386 directly (see the Du Fu song generator project).

In any case, try a great size device as a way to get the best results.

A number of more efficient amplifier chips are required for AA, which can use the TDA2003 10W Car Radio Audio Amplifier IC or the TDA1516BQ 24W BTL Car Radio Power Amplifier IC.