Simple electronic horn circuit diagram

This electronic horn circuit is a very simple and easy to construct horn circuit that can be used for bikes or some other vehicles or applications .

This electronic horn circuit use only one gate of a 4093 quad 2 input NAND Schmitt trigger , connected in a low frequency , square –wave oscillator circuit .As you can see in the circuit diagram the output of the oscillator ( pin 3) drives the gate of Q1 transistor and the drain of the IRF511 FET drives a small horn speaker .  The output frequency of the horn’s output can be modified by adjusting the R1 potentiometer .
For this simple horn circuit you need to use a 12 volts regulated power supply circuit .