LED Flasher circuit

LED Sequence Flashing | LED Flasher using 4017

LED Flasher Chaser Project Circuit

The LED flasher is very interactive visual lighting and this is very easy to connect with a circuit without any external switching component like relay or Transistor. 

Here is a circuit diagram of LED chaser which is very easy to construct and looking very  beautiful and interesting.

 This LED Flasher/Chaser circuit made using very popular ic 555 Timer and 4017 Counter . Total 10 LEDs connected in this circuit  (one Extra -optional) . All LEDs are Turn On ONE BY ONE in sequence . If one LED is OFF then Next is ON and so on .

LED flasher sequencer chaser using 4017


Working of Circuit

click here to know about how 4017 works

The 555 ic is connected itself with astable mode and gives a Signal of randomly continuous  pulses. When switch is pressed the switch, the 555 ic gives pulses at output pin 3 with LOW –HIGH randomly (0 1 0 1 0 1…..).   and then 4017 ic gets clock signal with each pulse at pin 14 and according to these pulsed signal it gives output . whenever pin 14 receives a positive pulse, counter goes to next .

At first clock pulse LED1 glows. At second clock pulse output goes from Pin 3 to 2 and LED2 glows and first off and so on.

The speed of flashing can be increased or decreased by the changing the value of Capacitor and resistor which is connected with pin 2 of 555, because of changing the value of these the output pulse signal speed varies.

10 LED Chaser flasher circuit diagram

LED flasher

LED chaser flasher



        LED- 11

        LM555 ic-1

        4017 ic -1






          Preset 500K-1

          470 ohm-2

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Hi, My name is Aman bharti, I am interested in making and study of Electronics & circuit diagram. I like to share my knowledge and all ideas with people which i get from My Experiment & from different sources. I try to provide any circuit details deeply with test result as possible as. You can contact me on- Email – [email protected]

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