# How to Make Voltage Controller Circuit Using 13003 Transistor

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Hii friend,

Today I am going to make a circuit of Voltage controller that will give output variable voltage power supply.When we make electronic projects then we need different voltages to operate the circuit.That's why I am going to make this circuit.

Let's get started,

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## Step 1: Take All Components As Shown Below

Components required -

(1.) Transistor - 13003 x1 (This transistor we can get from old cfl.This is NPN Transistor.)

(2.) Potentiometer - 100K x1 (We can also use 47K Potentiometer.)

(3.) Multimeter - (For testing purpose)

(4.) Battery - 9V x1 (Here I am taking 9V battery for demonstration purpose.I will use it as input power supply)

(5.) Battery clipper x1

(6.) Connecting Wires (Here I took wires with clipper because I have to check voltages with the multimeter)

## Step 2: Pins of NPN Transistor-13003

This picture shows the pins of Transistor 13003.This is an NPN Transistor.

Pin-1 is Base,

Pin-2 is Collector and

Pin-3 is Emmiter of this transistor.

## Step 3: Solder Base Pin of Transistor

Firstly we have to solder Base pin of the transistor to middle pin of the Potentiometer as solder in the picture.

## Step 4: Solder Battery Clipper Wire

Next Solder Input power supply wire.Here I will give 9V DC Input power supply from the Battery.

NOTE : We can give Maximum 12V DC Input Power supply to this circuit.

Solder +ve wire of input power supply to pin-1 of the potentiometer and

solder -ve wire of input power supply to emmiter pin of the transistor as you can see in the picture.

## Step 5: Connect Output Power Supply Wire

Next we have to solder output power supply wire to the circuit.

Solder +ve wire of output power supply to pin-1 of the potentiometer and

solder -ve wire of output power supply to collector pin of the transistor as you can see in the picture.

## Step 6: Testing

Now our circuit is ready so give input power supply to the circuit and connect digital multimeter to output power supply wire for measuring it's different voltages.

~ As you can see in the picture all three images shows different voltages.We can change voltages by rotating the knob of potentiometer.

This type we can make Variable voltage power supplier circuit using 13003 Transistor.If you want to make more electronic projects like this then follow utsource123 now.

Thank you

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