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Astable Multivibrator using 555 Timer


Astable Multivibrator using 555 Timer Circuit and operation Astable Multivibrator using 555 Timer has no state stable. It generated free running frequency without any output source. The IC 555 can be used as an independent multivibrator with three external components: two resistors (R1 and R2) and capacitor (C). The diagram for IC 555 timer is shown below in the figure with external components. Pins 2 and 6 are connected with each other and no external [...]

Astable Multivibrator using 555 Timer2019-04-24T17:33:17+00:00

Astable Multivibrator using Transistors


Astable Multivibrator using Transistors Multivibrator is an astable multivibrator or multivibrator that can be used freely and without any fixed condition. The output is constantly moving between two unstable states without the help of external stimulation. The length of each state is determined by the time constant of the resistance-capacitor (RC). Multivibrator stable with cross-circuit In the above diagram, we can find two wiring transformers as switches. Read the transistor section as a switch. When [...]

Astable Multivibrator using Transistors2019-04-16T17:16:15+00:00

555 Timer


Introduction 555 Timer The 555 timer was introduced more than 40 years ago. Thanks to its relative simplicity, its ease of use and its low costs, it has been used in thousands of applications and is still widely used. Working of 555 Timer IC To understand the working of 555 timer IC we have to recall the comparator, S R flip flop, NPN transistor working. 555 Timer IC consist two comparator, one S R flip [...]

555 Timer2019-04-15T17:10:13+00:00

Light or Dark Detection using 555 Timer and LDR


Dark/Light Detector using 555 Timer & LDR Here we have explained a simple Light or Dark Detection using 555 Timer and LDR (Light Dependent Resistor) which has the ability to sense the light and whenever the light is not detected, it triggers the IC and glows an LED connected with the circuit. In place of LED we can also use a buzzer if we want to use it as a morning alarm. The concept of [...]

Light or Dark Detection using 555 Timer and LDR2018-02-13T11:17:04+00:00

Music Box


Author – Arpita Kashyap Introduction It is which a device produces automatic sounds by the use of set of pins placed on a revolving cylinder or disc. In other words, we can say that it is a box which plays a tune when the box is open. Block Diagram of Music Box When the power supply is switched on, supply reaches to pin number 4 and 8 of 555 Timer IC 1. Here IC1 (U1) is [...]

Music Box2017-05-22T00:43:46+00:00

Machine Gun


Author - Arpita Kashyap Introduction A machine gun is a fully automatic mounted or a portable firearm   to fire bullets in quick succession from magazine, typically at a rate of 300 to 1800 rounds per minutes. Here the main aim of project to produce the sound just similar to machine gun. When there is triggering it will produce sound just in a way like machine gun. Block diagram of Machine Gun When power supply is switched [...]

Machine Gun2017-05-20T23:50:49+00:00

LED Light Dimmer


Author - Arpita Kashyap Introduction LED is a light emitting diode or a semiconductor device that emits visible light when an electric current is passes through it. LED bulb is an assembly of components packaged to fit into a common light socket. In most of the cases, light emitting from semiconductor device is monochromatic that means occurring at a single wavelength. LED can be used in flashing indicators, led dimmers, traffic signals, led bulbs, and [...]

LED Light Dimmer2017-05-20T21:39:37+00:00

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