wireless tester.how to make wireless tester.BC547 NPN transistor use

 wireless tester.how to make wireless tester.BC547 NPN transistor use

Today I am going to make Voltage detector circuit using BC547 transistor. This circuit is very sensitive and it is good project to detect voltage.

Components required 

(1.) Transistor - BC547 x3

(2.) Buzzer x1

(3.) Copper wire x1

(4.) LED - 3V x1

(5.) Battery - 9V x1

(6.) Battery clipper x1

(7.) Resistor - 220 ohm x1

BC547 -

pin-1 is collector, pin-2 is base and pin-3 is emitter -

solder collector pin of one transistor to another and

base pin of 2nd transistor to emmiter pin of 1st transistor as solder in picture.

Next solder all three transistors as solder in the picture.

Solder collector pin of 3rd transistor to collector pin of transistor 1 and 2

and solder base pin of 3rd transistor to emmiter pin of transistor-2 as solder in picture.

Solder -ve pin of LED to common collector of all transistors -

Now connect 220 ohm resistor to +ve pin of LED as connected

Next connect the battery clipper wire to the circuit as solder in the picture.

Solder +ve wire of battery clipper to +ve of buzzer and

-ve wire of battery clipper to emmiter of 3rd transistor.

Next solder copper wire to base pin of 1st transistor as shown in picture.

Now Voltage detector circuit is ready, let's check it.

Since circuit is completed.

Connect battery to battery clipper and check AC line.This circuit will detect phase wire and neutral wire.

Buzzer will give sound and LED will glow when copper wire of this circuit will be in the vicinity of passing current phase wire.

We can easily detect phase wire and neutral wire of household wiring.

NOTE 1: We don't have to touch circuit / copper wire of circuit to the surface as you can see in the picture. Because this circuit is very sensitive.

NOTE 2 - If your circuit is not working then please change transistors.

Above picture 

Above pictures shows when I put this circuit near current flow phase wire then Buzzer is activated and give sound and LED is starting to glow.

And when I put it near to neural wire then It's circuit is not activated.

If you want to make more electronic projects like this then don't forget to follow utsource.

 wireless tester.how to make wireless tester.BC547 NPN transistor use

Today I am going to make Voltage detector circuit using BC547 transistor. This circuit is very sensitive and it is good project to detect voltage.

Components required 

(1.) Transistor - BC547 x3

(2.) Buzzer x1

(3.) Copper wire x1

(4.) LED - 3V x1

(5.) Battery - 9V x1

(6.) Battery clipper x1

(7.) Resistor - 220 ohm x1

BC547 -

pin-1 is collector, pin-2 is base and pin-3 is emitter -

solder collector pin of one transistor to another and

base pin of 2nd transistor to emmiter pin of 1st transistor as solder in picture.

Next solder all three transistors as solder in the picture.

Solder collector pin of 3rd transistor to collector pin of transistor 1 and 2

and solder base pin of 3rd transistor to emmiter pin of transistor-2 as solder in picture.

Solder -ve pin of LED to common collector of all transistors -

Now connect 220 ohm resistor to +ve pin of LED as connected

Next connect the battery clipper wire to the circuit as solder in the picture.

Solder +ve wire of battery clipper to +ve of buzzer and

-ve wire of battery clipper to emmiter of 3rd transistor.

Next solder copper wire to base pin of 1st transistor as shown in picture.

Now Voltage detector circuit is ready, let's check it.

Since circuit is completed.

Connect battery to battery clipper and check AC line.This circuit will detect phase wire and neutral wire.

Buzzer will give sound and LED will glow when copper wire of this circuit will be in the vicinity of passing current phase wire.

We can easily detect phase wire and neutral wire of household wiring.

NOTE 1: We don't have to touch circuit / copper wire of circuit to the surface as you can see in the picture. Because this circuit is very sensitive.

NOTE 2 - If your circuit is not working then please change transistors.

Above picture 

Above pictures shows when I put this circuit near current flow phase wire then Buzzer is activated and give sound and LED is starting to glow.

And when I put it near to neural wire then It's circuit is not activated.

If you want to make more electronic projects like this then don't forget to follow utsource.