lamps one by one and then blink all two times.
The circuit is built around two famous ICs, which are NE555 timer and CD4017 decade counter. The 4017 IC has 10 outputs from which we have used only 6 outputs. The NE555 timer is working as a positive pulse generator in the circuit to provide pulses at the clock input pin14 of the 4017 IC. The 4017 IC will activate a new output and close the previous each time a positive pulse received from the 555 IC. The speed of flashing can be increase or decrease with the 100K variable resistor.
The circuit is using four 220V 100 watt lamps. But you can also use other low watt 220V bulbs available in the market with different colors. The triac BT136 can handle max 4 ampere load therefore make sure to use the number of lamps according to this limit.
Note: Many points of this circuit are at AC mains voltage. It could give you lethal shock if you are not careful. If you don't know much about working with AC line voltages do not attempt to construct this circuit.
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At many occasions we require some decoration lights to decorate our homes or other places like stages, parties etc. The circuit shown here is ideal to use for these purposes. The circuit is using few low cost components to provide a good and eye catching effects. First it will each set of two 220V
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