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CONTACTLESS VOLTAGE TESTER/INDICATOR CIRCUIT

                          CONTACTLESS VOLTAGE TESTER/INDICATOR CIRCUIT


                          The contactless voltage tester circuit is which indicates the presence of voltage without touching the voltage line.This is done with help of the transistors.Thus it indicates the voltage folw in the circuit.

COMPONENTS REQUIRED:
                  


                   1)BC547 transistor-2
                   2)RESISTORS-1 MEGA OHM,100/10K OHM,200 OHM
                   3)LED
                   4)DC POWERSUPPLY
                   5)CONNECTING WIRES

CIRCUIT DIAGRAM:


PROCEDURE:


           Take the breadboard and insert the transistors in it.Let us assume the transistor as T1,T2,T3,where T1 is Emitter is connected with the negative from supply and Collector is connected to Led and it is connected  to the positive power supply and Base is connected with the Emitter of the T2 transistor.Now the T2 transistor Collector is connected with the 100k ohm and connected to positive power supply and the Base is connected with the T3 Transistor Emitter as shown in above circuit.ATlast the T3 transistor Collector is conneceted 1 Megaohm resistor to positive power supply and the base is connected to an copper strip and that detects the voltage flow.Connect to the supply the circuit  works.

LETS CHECK HOW THE CIRCUIT WORKS:


                                                      POWERED BY
                                                              NBSL 

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