About: I like playing football,basketbal ,making circuits and doing science.
Hi friends!!!

In this instructable i will tell you how to make amazing dancing  lights , so that you can build it up at home ( and even start your own disco if you have enough cash!!!!just kidding).
Using only few and simple components you can make this amazing thing.
So, may you achieve success .
All, the best.

********************PLEASE VOTE FOR ME.THE BUTTON IS IN THE TOP RIGHT CORNOR********************


I had two reasons which developed this idea in my mind-

1.  The first time the idea came into my mind was when I went into a party and saw those beautiful  lights and disco balls.Then I thought that how nice it would be if I could make my own.

2. Also I was searching the website and found  one of my friends posted an instructable of the same kind using an arduino, but this one is very simple as compared to that as it needs only a  very simple components(as arduino is not so simple)


Practically it does not really matter whether you know the working principle or not, but as it is my responsibility i will tell it to you anyway.
The joints in the wire are shown by the dots.


It works on the principle of charging and discharging of capacitors C1 and C2. Current from the positive of battery flows through first set of LEDs D1-D3 to the collector of Transistor1 through resistor R1. Resistor R1 limits current through the LEDs to protect them. The current through R1 charges capacitor C2. It then discharges through the base of T2 and resistor R4. This gives base current to T2 and it conducts. As a result second set of LEDs D4-D6 lights as the current flows through T1.Capacitor C2 again charges and the cycle repeats.

***********In the schematic the led's are of particular colour but i used them of different colours,so that it looks good**********


The parts are not at all complex and can be found at any local electronics shop.


1.  LED'S (of any colours according to you)
2.  BC547 transistors  X 2                                                            (BUY)
3. 100 ohm resistors X 2 (BROWN BLACK BROWN)                 (BUY)
4. 10 micro F  40Volt  capacitor   X 2                                           (BUY)
5.47K ohm resistor X 2 ( YELLOW VIOLET ORANGE)              (BUY)                         SEE - Calculating resistance value


1. Soldering iron
2. Solder wire
3.General purpose PCB


First of all arrange all the parts on the PCB according to the schematic.Be carefull for the capacitorsas they may explode if connected in reverse polarity.

Then join all the parts .Then just solder them all together.

Now just turn off the lights and you are ready to party.


Well I wolud like to tell you one thing that you may create difference in  the blinking of the LED's by replacing the capacitor from 10uF to 100uF.


I would like inform you in advance that an electrolytic capacitor has to be correctly positioned according to its polarity or it may explode.!!!!!!! 

Step 6: FAQs

I would like to discuss a bit about the circuit.

Q1) The circuit is not functioning?

Ans)There could be many reasons-
a)The connections in the circuit are loose.
b)The power source is not connected properely.
c)The power source is not working.
d)Either or both of your capacitors is not working.

Q2)The LED's are not blinking?OR Only one set of the LED's is lighting up?

Ans) I myself encountered this problem but was able to solve it.Actually in my case one of the transistors was not working.
And this prompted me to post an instructable.
So, it is probable that the transistor in your case is not functioning.

It may also be that either of the set of LED's is not connected properelly.

                                              IF YOU STILL HAVE A PROBLEM I WILL BE VERY HAPPY TO SOLVE THEM



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    21 Discussions


    Question 2 months ago

    Can I add more LED's in this circuit

    The cappacitor must be connected in series or parallel ?

    can we use more leds in this circuit?

    can we use more leds in this circuit?

    Hi, Pranjal.
    I love this small project. Well done! I'm quite new in electronics, so dont laught at my method of trying to get what I want done. Thanks.

    I was trying to build a circuit that I believe could use a similar principle, but I just couldn't get it to function exactly the way I want. Now, I need a circuit that when powered, it would engage the load to work for a short while and then disengage.

    So I thought of diong something similar to your circuit using NOT logic gate; such that when the capacitor is fully charged, it's supply will power the load (loud alarm sounder) and also will disengage the capacitor from charging, because the base of the NOTing transistor is connected to the capacitor supply. That way, becasue of the required alarm period of about 30 to 60 seconds, the capacitor needs to be one that will be able to keep the alarm sounding loud for that period.

    Ok. In case I'm just complicating issues, what I want to design is a circuit that when it is initially powered, a loud alarm sounds for about 1min before it goes permanently off, even if the power remains, untill the next time the circuit is powered on afresh. But just keeping it simple — no programming.

    I have thougt of 555 timer, though. But whichever simple circuit would do.

    Thanks, Pran.
    Thanks, anyone.

    1 reply

    Yeah! I fixed this! But if anyone has another circuit, they could still share.

    Thanks, everyone.

    I made this dancing LED light on Proteous 8.0 and it worked.


    Hai pranjal12 . i made this circuit and faced a problem:-

    When i connected the 5v source to the circuit the led started blinking, but afer 5-6 seconds the became very fade.

    When i connected the circuit to a 7v source the the led did not blink, it bliked for 2 sec. and remained stable and fade.

    The changes which i have made to the circuit are:-

    transistor - BC548

    led - 2 Blue Coloured 3mm

    Resistors - 100k instead of 47k, And no resistor at the place of 100 ohms.

    power supply - 5-7 v dc

    And i will soon post the images of my circuit.

    Ihave checked every thing and everything is working

    please help


    bandicam 2014-09-02 16-29-54-940.jpg

    I saw its datasheet and it states it is a general purpose NPN transistor.
    So, i think it should work.

    I saw its datasheet and it states it is a general purpose NPN transistor.
    So, i think it should work.

    Nice multivibrator.
    You might want to mention you can slow it down with larger impedance R1 & R2 or larger capacitors.
    Or you can speed it up with smaller capacitors.
    Right now you are almost at your maximum collector current on your transistors, you could easily double R1 & R2.
    You can get data sheets at,

    1 reply

    I mentioned that capacitor thing in step 5, that you can create a increase or decrease in the blinking time by replacing capacitors from 10uF to 100uF.
    Anywasy thanx for the comment

    Good instructable.A suggestion to you is that you could have also used a 555 IC. The lights would be much more stabilized. But any ways good one. 

    1 reply

    Like in the schematic there is a NE555 timer , but the problem is i don't have the other IC.


    Voted! that's great it's so so simple to make may i ask from where you get these transistors in india ??

    1 reply

    Well, BC547 is a very common transistor and youn find can find it in many electric circuits.
    And there are many local shops where you can find these.