Cricket Sound Generator Circuit
This cricket sound generator circuit uses the LM324 OP-AMP as a frequency generator and a buzzer to emit sound without using ROMs. Read more
Sound Generators
Simple Telephone Ring Amplifier circuits
The telephone repeater circuit or The call signal peripheral circuit to the loud than the original,with a buzzer or a electric bell, to increase loud sound Read more
Doorbell circuit using transistors and IC-555
The 2 tone doorbell circuit, which is an electronic buzzer types,but them has melodic sound than general electric bell. People have seen two tone bell sound Read more
Learn Melody Tone generator circuits using HT82207 | UM3491| MM5837
This is the Melody and Music tone generator circuit which I think is useful for adding color in the electronic work is good, Can be applied to sound an alarm, or assembly electronic projects very well. An examples circuit that I suggest, is a switch for adjusting the sound more, it is not boring, these … Read more
220V AC siren circuit using transistors
This AC 220V siren circuit is a simple siren that uses 220V AC as a power supply. It is small size and uses a piezo speaker cause use low power and saving. How it works This circuit is shown in Figure 1 which we use power source by reducing AC-voltage of 220 volts down by the resistors-R1, … Read more