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sound operator on off switch circuit diagram

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 The presented circuit acts as a clap switch.  This circuit can be turned on or off by any voice.   This circuit is built using IC CD4017.Also, three transistor BC547 have also been used in this circuit.   Any electrical device can be turned on or off by connecting a relay to this circuit.   This circuit requires 9V DC current to work.  You can also supply power to this circuit from a 9V battery or a 9 0 9 V transformer.  list of all the electrical components used in this circuit is given below. Electronics components list  IC CD 4017 Transistor  Q1, Q2, Q3 BC 547 Resistor  R1, R2  10k ohm R2  1M ohm R4 470 ohm R5 1I ohm Capacitor  C1 103pf Diode  D1 1N4007  LED  Mic Relay  12v PCB BORD