Car horn

In this project, you are going to blow a car horn by mixing two sounds of different frequencies. After completing the project, you will be able to produces a low-tone horn, simulating one of the various horn sounds.

When you finish wiring, turn power ON and press S1. As far as you hold S1 down, you will be hearing a sound similar to a car horn.

This project has two astable multivibrators configured of transistors. One multivibrator, made up of Q1 and Q2, puts out a tone of approx. 300 Hz.

The other multivibrator, made up of Q3 and Q4, puts out a tone of approx. 500 Hz. The two tones are mixed by Q5, amplified by Q6, and given forth from the speaker. What you hear will be a resonance of two sound sources of 300 Hz and 500 Hz.

Bill Of Materials For Car horn.DSN
13 Resistors
Quantity: References Value
4 R1, R4, R6, R9 1k
3 R2, R3, R8 22k
2 R5, R10 100k
1 R7 10k
1 R11 470k
1 R12 4K7
1 R13 33k
7 Capacitors
Quantity: References Value
3 C1, C3, C4 0.1uF
1 C2 0.01uF
1 C5 100uF
1 C6 10uF
1 C7 470uF
6 Transistors
Quantity: References Value
5 Q1-Q5 2SC945
1 Q6 2SA933
2 Diodes
Quantity: References Value
2 D1, D2 1N4148
4 Miscellaneous
Quantity: References Value
1 + 6V








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