here is the circuit diagram.!

Step 1: Components Required

1) 2 led of different colours
2) 100uf capacitor
3) 555 timer ic
4) wires
5)9v battery
6) battery connector
7) 1 k ohm resistor 1
8) 10 k ohm resistor 1
9) 220 ohm resistor 2
10) bread boaed

Step 2: Connecting the Components

1) mount the 555 ic in the middle of the bread board
2)connect pin no 7 and 8 with 1 k ohm resistor
3) connect pin 6and 7 with 10k ohm resistor
4)join 2nd and 6th pin
5) join 4th and 8th pin
6) connect pin 1 and 2 with the capacitor
7) take a separate line from the pin 3 and connect one of the 220 ohm resistor to it, and connect the anode(+) of one of the led to the other end of the resistor and connect the cathode(-) of led to pin no 2.
8) connect the anode of another led to pin 4, then connect the another 220 ohm resistor series with it
9)connect the another end of the resistor to pin no 3

Step 3: Testing

connect the positive end of the battery to pin no 8 and negative to pin no 1.
You will see the LEDs flashing alternatingly... plz try this @ home it will cost below 2$.

hope you guys like this..
comment your doubts below
thank you..! meet you all soon with another circuit..

<p>Finally got it working! Used a few more wires to patch things together. Still trying to get a grasp on how it works, though. Powered by a BooSTick from Rover Development.</p>
<p>this is what ive been looking for, what is the time interval of the two leds blinking? and if i want to slower the time should i raise the amm=ount of resistor? to what cvalue? thanks</p>

About This Instructable




Bio: electrical and electronics engineering student
More by kathirava:Voltage doubler simple alternate LED flashing using 555 timer simple alternate LED flashing using 555 timer 
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