Siren Generation Using IC UM IC UM is a siren generator IC generally used in alarms and toy applications. Depending on the selection, it can. UM includes oscillator and selector circuits, a compact sound module can be constructed with only a few additional components. A. A brief overview of the UM IC. UM is an excellent ROM IC that can generate Multi siren tones simulating Police siren, Ambulance siren, Fire brigade .

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A speaker is commonly used The zener diode is connected directly to the 9 volt supply. This voltage is called Breakdown Voltage or Zener Knee voltage. Power failure alarm using diode and astable mode iv timer. While UM66 have a limitation of generating only one sound, we have UM which is very useful and can generate four types of sound i.


It is a low cost and low powered 8 pin IC. It has inbuilt oscillator and sound selector circuit, It u3561 few components um356 produce output. Uk3561 order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page. When an electric signal is applied to the input pin of speaker, it generates sound waves.

Its resistance is given by the ratio of voltage applied across its terminals to the current passing through it. The output generated by the IC is not sufficient to drive a 8ohm small speaker, so to amplify the output of the IC, a transistor must be used at the output PIN 3.


A loudspeaker or “speaker” is a transducer that converts electrical energy into acoustical energy. Siren Sound generator circuit can be utilized in several applications, different siren sounds are used for many field based applications, here the following circuit can produce three different siren sounds Police siren, Fire engine siren, Ambulance siren. We can change the frequeccy by rotating the knob of variable resistor.

Resistor Resistor is a passive component used to control current in u3561 circuit.

Your email address will not be published. Quote and Order boards in iic on https: In the circuit, UM IC generates a tone similar to police siren and resistor R6 is used to control its oscillation.

UM Pin diagram and Pin description is given below, taken from its Datasheet:. It can easily drive magnetic speaker with a help of single NPN transistor. The DC current gain varies in range to BC is general purpose silicon, NPN, bipolar ix transistor. Liquid level Alarm using transistor and timer IC. This high-density System-in-Package SiP integrates controller, power switches, and support components. Mat switch can be used as a security measure in a restricted area. By using single IC UM we can build three siren sound generator circuit.


As we have used 9v battery, so we have used Zener Diode 3. Speaker A loudspeaker ym3561 “speaker” is a transducer that converts electrical energy into acoustical energy.

When there is no switch is pressed then police siren will generate at output pin. Get Our Weekly Newsletter! The UM has 8 pins, and it can intake 3 to 5V as a power supply and gives output range U should be careful while drawing the circuit. It is used for amplification and switching purposes.

Three Siren Sound Generator Circuit Using UM3561

The charge q stored in a capacitor is the product of its capacitance C value and the voltage V applied to it. Step-By-Step 1 2 3 reads. They are omnipresent in All the diodes allow uk3561 of current in only one direction forwardbut Zener diode can allow current in reverse direction if the voltage goes beyond a certain limit.

This high is provided to Darlington pair transistor T4, T5 and the loudspeaker connected to it starts sounding. Group all Htabs Electronics.

Choosing Motor For Robots. Just put the switches beneath the mat after regular intervals so that when anybody who puts his feet on switch will engage the iv.

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