Simple Buzzer Circuit with NE555 IC

33,573 views

A Buzzer Circuit here is a sound producer with simple circuitry involving NE555 timer IC along with a variable resistor-capacitor network and a speaker.

ne555-timer-ic

Hardware Components

The following components are required to make Buzzer Circuit

S.noComponentValueQty
1.Breadboard1
2.Connecting Wires1
3.Battery9v1
4.ICNE555 Timer1
5.Variable Resistor1k1
6.Resistor15k, 5.6k1,1
7.Electrolyte Capacitor10uF,100uF1, 2
8.Speaker 8 ohm1
9.Ceramic Capacitor0.1uF1

NE555 IC Pinout

555 timer ic pinout

For a detailed description of pinout, dimension features, and specifications download the datasheet of 555 Timer

Buzzer Circuit

simple-buzzer-Circuit-Diagram-Schematic

Working Explanation

A NE555 IC produces accurate oscillation or time delays. Moreover, the interval timings can be controlled or set by using a resistor and capacitor network in the mono-stable mode of operation. Furthermore, the stable mode of operation of the IC involves the changing of frequency and duty cycles with the help of a capacitor and a variable resistor network.

The Circuit with all of the values of its resistor and capacitors set, when supplied with 9 Volts of battery, produces a buzzer sound. This IC NE555 drives an 8Ω to 25Ω loudspeaker to produce an audible square-wave tone. In addition to this, a Siren or 555 tone generator can be interchangeably used as a buzzer.

Application

  • Used in small applications such as schools, Colleges, or any institution as Quiz buzzers.
  • Used in a warning Siren application.