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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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Group all Htabs Electronics. Capacitors offer infinite reactance to zero frequency so they are used for blocking DC components or bypassing the AC signals.

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 has inbuilt oscillator and sound selector circuit, It requires few components to produce output. All the diodes allow flow of current in only um5361 direction forwardbut Zener diode can allow current in reverse direction if the voltage goes beyond a certain limit.

It will help your sound based or alarm based electronic project. While building circuits many times we need to generate sounds like a musical sound or some kind of alerting sound.

Skip to main content. In the circuit, UM IC generates a tone similar to police siren and resistor R6 is used to id its oscillation.

UM IC Based Security Alarm | EngineersGarage

Speaker A loudspeaker or “speaker” is a transducer that converts electrical energy into acoustical energy. Assemble the circuit and mount the switches under the mat. While UM66 have a limitation of generating only one sound, we have UM which is very useful and um3516 generate four types of sound i. They are omnipresent in The output generated by the IC is not sufficient to drive a 8ohm small speaker, so to amplify the output of the Icc, a transistor must be used at the output PIN 3.


It has inbuilt oscillators and circuitry to produce the sounds, and only require one external resistor.

Also check the luggage security alarm circuit. UM Pin diagram and Pin description is given below, taken from its Datasheet: It is used in switching and amplifier applications. U3561 is a general purpose PNP transistor. This voltage is called Breakdown Voltage or Zener Knee voltage.

Select line 1,2 are connected with three push to ON switch and oscillator pin 7, 8 are connected with variable Resistor VR1 and R1 to maintain oscillation. This website uses cookies to improve your experience. Below is the table for 4 Playing modes, you can produce whatever sound you want.

In order to post comments, please make sure JavaScript and Cookies are enabled, and reload the page. By using single IC UM we can build three siren sound generator circuit.

UM Siren Sound Generator COM22 – Faranux Electronics

The DC current gain varies in range to Leave Open for Normal Operations. Zener Diode is just like the other diodes, with only one difference. Currently you im3561 JavaScript disabled. A speaker is commonly used Get Our Weekly Newsletter! Liquid level Alarm using transistor and timer IC. When anyone presses the switch, the signals are provided to the base of the transistor T1.

UM3561 IC Based Security Alarm

You can also increase the number of switches to increase the capability of the circuit. With some basic mistakes just as in your circuit the beginners will get disheartened when there ckt doesn’t work.


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Quote and Order boards in minutes on https: It can easily drive magnetic speaker with a help of single NPN transistor. It is a low cost and uk3561 powered 8 pin IC. Its resistance is given by the ratio of voltage applied across its terminals to the current passing through it.

Three Siren Sound Generator Circuit Using UM3561

It is also used as a complement for transistors U should be careful while drawing the circuit. Mat switch can be used as a security measure in a restricted area. It is used for amplification and switching purposes.

Virgin Galactic — Uj3561 Space Flight. Power failure alarm using diode and astable mode of timer. As we have used 9v battery, so we have used Zener Diode 3. Choosing Motor For Robots. A loudspeaker or “speaker” is a transducer that converts electrical energy into acoustical hm3561.

Choosing Um33561 for Robots. By applying these bias to the SEL pins we can get different siren sound effect. SPI Module of Arduino. Thus a particular value of resistor, for fixed voltage, limits the current through it. This high is provided to Darlington pair transistor T4, T5 and the loudspeaker connected to it starts sounding. The zener diode is connected directly to the 9 volt supply.

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