Led Chaser Circuit Using 4017 And 555 Pdf
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Decade Counter Ic Working. File Functional Diagram Svg. Flip-flop Timer Using
The blinking sequence is marked with numbers on the LEDs.
LED Chaser circuit using 4017 and 555
The article discusses the construction of 9 interesting LED chaser circuits, which not only create beautiful running light effect but are also easy to build. We also discuss how to modify these into a design popularly known as "knight rider" chaser circuit. These primarily incorporate LEDs as well as mains operated bulbs through triacs. The proposed circuit is transformerless and is thus a lot compact and light weight.
Light chasers are decorative lights or LEDs arranged in different moving patterns which create a chasing light or running light kind of effect. Though the more complex lighting might need the incorporation of microcontroller ICs, simpler yet very interesting light effects can be generated through ordinary ICs like IC and IC as shown below.
This design requires very few components for the configuration. As can be seen in this configuration, in response to the pulses from IC , the IC generates a running or chasing light pattern across the connected 10 output LEDs.
The chasing pattern goes on repeating itself from start to finish as long as the IC keeps pulsing pin 14 of the IC The chaser speed can be easily adjusted by determining the correct frequency rate of the IC , as explained below:. The lights connected are mostly LEDs, however it can be modified for using with mains operated lamps also. Although the above design looks great, it is possible to create even more complex and interesting light effects using the same IC and IC combination, through some minor modifications, as described below:.
The first concept presented here is basically a running light effect generator circuit, quite resembling the effect produced over the popular "knight rider" car. The circuit mainly comprises of IC and the IC for implementing the required functions.
The IC is used to generate the clock pulses which is fed to the clock input of the IC These clock pulses received from the IC is translated into a sequencing or chasing effect over the LEDs connected across the various outputs of the IC In its normal mode the IC would have generated a simple start to end sequencing of the LEDs wherein the LEDs would have lit up and shut off one after the other in a sequencing pattern with a rate determined by the IC cock frequency, this would repeat continuously as long as the unit stays powered.
As can be seen in the first circuit diagram, the design produces a reverse forward moving effect of the LEDs in response to the clocks generated by the IC which is basically wired as an astable.
The frequency of this astable can be varied by adjusting the associated k pot which in turn influences the LED sequencing speed. This circuit can be also modified for illuminating mains operated bulbs by incorporating a few triacs in conjunction with the LEDs present at the outputs. The second figure shows the complete arrangement where we can see 6 triacs being rigged across the output LED ends via 1 K resistors.
Again, this mains operated knight rider light chaser does not depend on bulky power supply stages rather employs a simple capacitive power supply for implementing the proposed running light or chasing LeD effect. The above circuit can be also as effectively used for car installation by doing the following modifications to the above circuit.
The circuit shows how the design can be used for illuminating 12V car automotive lamps. In next idea is also a chaser circuit which produces a LED scanner type illusion through the various sequencing illumination modes over the attached LED arrays.
The idea was requested by Mr. Danely Sooknanan. I want to build the new Knight rider mustang light for my car scoop. What i have read is. It's made up out of distinct LEDs, arranged in three rows of 80 in each row, then divided up into two sides.
My question is how you build it. How many rows of leds will i get by that dimension. What kind of led to use? What can i use for the diffuser case? What to use for the control box.
In the actual knight rider LED scanner unit as shown in the video, there are as many as 29 number of functions to be precise, implementing those is virtually impossible using discrete components and without employing MCUs, however here we'll see how a few of these could be possibly made using just a handful of components.
The main two functions of the proposed Mustang LED scanner circuit may be assessed as given in the following description:. The rate or the speed of the above procedures are adjustable through a pot as per individual preferences. The above two functions can be easily implemented using a couple of 74LS ICs and a IC oscillator as shown in the following circuit diagram:. Please check out this article. In the shown mustang scanner LED light circuit, a couple of 8-bit parallel-out shift register ICs 74LS are employed, driven by the IC configured as the clock oscillator.
As may be seen in the above circuit diagram, a 3 pole, 9 throw switch is used as the changeover switch for imitating the 2 functions explained in the previous section above. In mode1 S1 is connected as shown in the circuit diagram, in this position the LEDs illuminate in an sequencing LED bar like fashion with every rising edge of the clocks from the IC until all the LED light up and the final "high" reaches pin16, when T1 momentarily resets both the ICs producing in instant shutting off of all the LEDs at once.
As soon as the above happens, a new cycle initiates afresh and the cycle repeats for so long as the S1 position isn't changed. Now as soon as the high across the shifting outputs reach pin 16, T1 instantly inverts and renders a low to the serial pins1,2 of the ICs so that now the LEDs begin shutting off one by one across the arrays in the same sequence as it illuminated in response to every clock from IC The procedure keeps repeating as long the switch S1 position is not changed from its existing position.
The above two functions are pretty easily implemented and we have our LEDs scan the whole array quite in the manner the actual Mustang scanner is supposed to do, however with the above two functions the features look much limited and we would want to insert a few more of the features as may be witnessed in the original video.
I'll keep the article updated with the new added features, but in the meantime let's learn how the LEDs could configured to the above scanner design as per the request made by Mr. Another interesting scanner function that could be easily added to the above circuit with a feature producing rapid to and fro sequencing over the two strips in groups of four. This could be easily done by toggling an arrangement wherein T1 would freeze once all the LEDs switch ON in bar like style.
Now in this position a with its own oscillator would come into the scene with its outputs switching OFF the lit LEDs rapidly in a reverse forward manner. So now we have three interesting scanning sequences toggled in our very own homemade mustang LED scanner circuit, any more possible solutions are welcome from the readers.
The third circuit below discusses a cool chasing LED light circuit that features a timed delay fading slow transition effect across the whole illuminated sequencing LEDs. I want to design a circuit consisting equal no.
I want to have these LEDs in a continuous and smooth transition effect like below,. At first, Red branch of LEDs lit for a preset time then slowly fade out and then Green branch of LEDs fade in and fade out then next branch fade in and so on.
I would like to have control on transition time delay, light timing, fade in or out timing if possible. And I don't want to use any Programmable IC for this. So please please let me know if it possible without any programmable IC. It is okay even if I need several ICs to accomplish the job.
You just show me the way!! Thank you very much once again for your valuable time and for a quick reply! I am looking forward to you response!! The proposed chasing, fading LEd light circuit may be understood with the help of the above schematic and the following description:.
The upper circuit is a standard LED chaser design comprising of a decade counter IC and a clock oscillator using IC astable configuration. If we connect LED directly across the outputs and ground, the LEDs would illuminate in a dot mode fashion from the first pinout upto the last in a sequencing pattern resembling a chasing effect.
This effect is pretty ordinary and we all probably have come across and built such light chasers circuits quite often. However as per the request the effect needs to be enhanced by adding a slow transition over the LED illumination as it sequences across the entire channel. This fading transition on the sequencing LEds is expected to generate an interesting group LED chasing effect instead of an illuminated dot like appearance.
The above intriguing show could be easily implemented by connecting the LEDs to an intermediate BJT delay generator circuit. This BJT circuit becomes responsible of generating the intended transition delay over the LED illumination and can be witnessed in the lower design.
This stage needs to be repeated across all the selected outputs of the outputs for achieving the desired chasing, fading slow transition over the LEDs. As requested the rate of the above fading slow transition could be controlled by adjusting the given pot. The circuit is basically a simple delay timer which sustains the illumination on the sequencing LEDs for a few moments depending upon the set value of the pot. The stored charge on the capacitor produces this timed delay effect on the LEDs which could be predetermined as per ones own choice.
The speed of the sequencing could be also altered by tweaking the IC k pot as per individual choice which this could in turn interfere with the delay transition effect and thus is a matter of some trial and error until the most attractive set up is determined.
For an improved fading response the LED could be connected across the emitter and ground of the circuit, as indicated the below given diagram:. The next fourth design explains how to build an 18 LED chaser circuit through a simple cascading of two ICs, and some passive electronic components.
Here we are discussing how to make a simple LED running light which can be built by any newcomer in the field albeit the individual has some knowledge of soldering and regarding the commonly used electronic components. IC is used as the Oscillator. Another IC provides the clock signals to the counter ICs. We all have probably seen how the IC can be configured for creating the light chasing effect using LEDs, however the number of maximum LEDs supported by this IC is not more than ten.
The diodes included in the circuit especially are responsible for switching the ICs into a cascading action. The whole circuit can be built over a general purpose PCB, and connected together by soldering with the help of the shown diagram. The above 18 LED cascaded chaser circuit can be also conveniently built using a astable circuit , as shown below:. In the following article we will earn how to build a simple LED chaser circuit with a push pull or reverse forward sequencing effect , and also in the later part of the article we will learn how this simple LED chaser cold be upgraded to a to LED laser circuit with a reverse forward LED sequencing effect.
Here we will learn how to make a simple yet effective to and fro or reverse forward light chaser circuit using LEDs. The IC has 10 outputs which generate the sequencing high outputs in the order of the pin outs - 3, 2, 4,7, 10, 1,5, 6, 9, The sequencing takes place in response to a frequency applied at pin 14 of the iC. Pin 15 is the reset pin, and it resets the output to the start pin in response to a positive response to it. The following section will explain how this may be accomplished using LEDs, however any number of LED could be used just by modifying the transistors and the series parallel connections for the LEDs, let's learn the details.
The IC is the main part of the entire system whose outputs have been very cleverly manipulated using diodes. For handling as high LEDs, transistor buffer stages have been included in the circuity. Each transistor or the channel can hold upto 50 LEDs, the LEDs are connected in series and parallel combination as shown in the last diagram.
The LEDs are connected to the collector of the respective transistors as referred to in the last diagram. A single series for each channel has been shown in the diagram. The numbers can be simply increased just by inserting more such series in parallel to the respective strings of the different channels. The sixth concept presented below is also another LED chaser circuit but includes a blinking effect to the design. The circuit was requested by Mr.
LED Chaser circuit using 4017 and 555
These circuits can be employed on a car, motor cycle, bike etc. In this, the LEDs simply turn on one after the other in a sequential fashion. The third circuit is also implemented using CD In this circuit, the LEDs will glow in a different pattern i. In the final circuit, the LED initially travel in the one way and then travel in reverse direction. It means, the pattern is same as a pendulum as it travels back and forth. This circuit can be utilized for the beautification of the car or it can be helpful at the time of crisis when your car broke down and you need help.
It consists — in essence — of a clocked IC or other electronic unit that drives an array of LEDs in such a way that individual LEDs or small groups of LEDs turn on and off in a predetermined and repeating sequence, thus producing a visually attractive display in which one or more ripples of light seem to repeatedly run through a chain or around a ring of LEDs. This article looks at a variety of practical circuits based on this particular IC. If desired, various outputs can be coupled back to the IC control terminals to make the device count to or divide by any number from two to nine and then either stop or re-start another counting cycle. Numbers of B ICs can be cascaded to give either multi-decade division or to make counters with any desired number of decoded outputs. The B is thus an exceptionally versatile device that can easily be used to chase or sequence a basic LED display of virtually any desired length.
If you would like to learn basic digital, but it is difficult and boring. It used in computer games and in many scientific and mathematics applications so is best for a beginner or for kids to learn digital, also my son loves them. The working principle. See in the circuit above. Which the output pulse frequency at pin 3 of IC1 is determined by R1, R
Explanation of Circuit's Working: The timer IC is configured to work in astable mode. Which means, the output from the timer changes continuously.
LED Chaser using 4017
You must have seen different kinds of decoration lighting patterns. When we power the circuit, LEDs start glowing one by one for a defined time period. So that counter changes its state faster. Here in this project we configured timer as an Astable multivibrator in which both the stages of signal are unstable.
Here we are going to make LED chaser. LED chaser circuit mainly consists of two circuits. The IC circuit is mainly used for providing free running frequency output.
Эти изотопы нельзя разделить путем обычного химического извлечения. Кроме незначительной разницы в атомном весе, они абсолютно идентичны. - Атомный вес! - возбужденно воскликнул Джабба. - Единственное различие - их атомный вес. Это и есть ключ.