Siren sound generator circuit with UM3561

Posted on Feb 4, 2014

The circuit we are going to discuss here is a four siren sound generator using UM3561 IC which is a low power CMOS IC. The four different sounds can be produced by pressing the switches S1, S2 and S3. The circuit can be used for any type of sound generation requirements, for example you can use it as tone generator, alarm circuit, siren circuit e

Siren sound generator circuit with UM3561
Click here to download the full size of the above Circuit.

tc. The circuit is quite simple using only seven components and a 3V battery due to which it is ideal for many low voltage applications. The IC can drive a pheizo directly without using any amplication stage. For driving a 8 ohm speaker we have used a single transistor amplifier in figure 1. If more amplification required then use the circuit mentioned in figure 2 which is using a lm386 amplifier for further amplification of sound. The circuit mentioned in figure 2 is using a 3V zener diode for voltage regulation which will step down 9V to 3V because UM3561 IC can not be opreated above 3V DC.

Leave Comment

characters left:

New Circuits



Popular Circuits

Intruder Alarm
Universal Laboratory Power Supply Circuit
the shoe cover machine automatic test systems of 51 one-chip computers
diagram shows rather simple voltage
discrete robot schematics
SA607 SA607 Low-voltage High Performance Mixer FM IF System
ISL62382C High-Efficiency Quad or Triple-Output System Power Supply Controller for Notebook Computers
7400 SIREN
6 static display circuit