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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There should um356 a resistence of 1K. 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.

It can easily drive magnetic speaker with a help of single NPN transistor.

While UM66 have a limitation of generating only one sound, we have UM which is very useful and can generate four types um5361 sound i. It has inbuilt oscillators and circuitry to produce the sounds, and only require one external resistor. Group all Htabs Electronics. The zener diode is connected directly to the 9 volt supply.

The UM has 8 pins, and it can intake 3 to 5V as a power supply and gives output range It is generally used in alarms and toys. The charge q stored in a capacitor is the product of its capacitance C value and the voltage V applied to it.


It is used in switching and amplifier applications. Hm3561 a Comment Cancel reply Your email address will not be published. Liquid level Alarm using transistor and timer IC. While building circuits many times we need to generate sounds like a musical sound or some kind of alerting sound.

UM IC Based Security Alarm | EngineersGarage

Just put the switches beneath the mat after regular intervals so that when anybody who puts his feet on switch will engage the alarm. It is also used as a complement for transistors It is a low cost and low powered 8 pin IC.

This high is provided to Darlington pair transistor T4, T5 and the loudspeaker connected to it starts sounding. This switch, when hidden under the floor mat, triggers an alarm when the person walks over it.

By applying these bias to the SEL pins we can get different siren sound effect. Its resistance is given by the ratio of voltage applied across its terminals to the if passing through it.

Zener Diode is just like the other diodes, with only one difference. A loudspeaker or “speaker” is a transducer that converts electrical energy into acoustical energy. Choosing Motor For Robots. Capacitor Capacitor is a passive component used to store charge. We can change the frequeccy by rotating the knob of variable resistor. It will help your sound based or alarm based electronic project. Below is the table for 4 Playing modes, you can produce whatever um3651 you want.

As we have used 9v battery, so we have used Zener Diode 3. We’ll assume you’re ok with this, but you can opt-out if you wish.


U should be careful while drawing the circuit. Step-By-Step 1 2 3 reads.

UM3561 IC Based Security Alarm

This website uses cookies to improve your experience. Thus a particular value of resistor, for fixed voltage, limits the current through it.

It has inbuilt oscillator and mu3561 selector circuit, It requires few components to produce output. Capacitors offer infinite reactance to zero frequency so they are used for blocking DC components or bypassing the AC signals. Mat switch can be used as a security measure in a restricted area. Arduino based GPS receiver.

Speaker A loudspeaker or “speaker” is a transducer that converts electrical energy into acoustical energy. Leave Open for Normal Operations.

Three Siren Sound Generator Circuit Using UM

When anyone presses the switch, the signals are provided to the base of the transistor T1. Hi buddy there is basic flaw in circuit.

Assemble the circuit and mount the switches under the mat.

When there is no switch is pressed then police siren will generate at output pin. This high-density System-in-Package SiP integrates controller, power switches, and support components. Um3651 and Order boards in minutes on https:

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