# Make Pre Amplifier Circuit

73

Hii friend,

Today I am going to make a pre amplifier circuit.By using this circuit when we will say something on mic then the sound will play on amplifier.You can increase your voice level.

In many amplifiers doesn't have pre amplifier connection.so we can use this circuit in any amplifiers.

Let's get started,

## Step 1: Take All Parts

Take all parts as shown in the list and pictures -

(1.) Transistor - BC547 x1

(2.) Capacitor - 16V 100uf x2

(3.) Resistor - 100K x1

(4.) Resistor - 10K x2

(5.) Mic x1

(6.) aux cable x1

(7.) Battery - 9V x1

(8.) Battery clipper x1

## Step 2: Solder All Components

Solder all components according to circuit diagram.

This Circuit diagram is a rough diagram.

## Step 3: Solder 100K Resistor

Solder 100K resistor in Base and emmiter of the transistor.

## Step 4: Solder Capacitor

Next solder -ve of capacitor to base of the transistor.

## Step 5: Solder Again a Capacitor and Resistor

1] Now solder +ve of capacitor to emmiter of the transistor.

2] In emmiter of the transistor also solder a 10K resistor.

## Step 6: Again Solder a 10K Resistor

Again solder a 10K resistor to +ve of capacitor which is connected to base of transistor and another end of resistor solder to 10K resistor which is solder in emmiter of the transistor as you can see in the picture.

## Step 7: Solder a Mic to the Circuit

Now solder a mic to the circuit as shown in picture.

Solder -ve of mic to the collector of transistor and

+ve of mic to the +ve of capacitor which is connected in base of transistor.

## Step 8: Connect Each Other L & R of Aux Cable

Connect each other Left & Right wire of aux cable as picture.

## Step 9: Solder Battery Clipper Wire

Solder battery clipper wire to the circuit as shown in the picture.

## Step 10: Solder Aux Cable Wire

Next solder aux cable wire to the circuit.

Solder +ve of aux cable wire to -ve of capacitor which is connected in emmiter of transistor and

solder -ve of aux cable to collector of the transistor.

## Step 11: Now Circuit Is Ready

Now circuit is ready to use.we can use this circuit in every amplifiers.

## Step 12: Connect Battery and Use It

Now connect battery to the battery clipper and plug aux cable to the amplifier

next set amplifier in aux mode/line in mode.

Now say something on the mic and listen in the speaker with high volume.

NOTE: You can also use long wire in mic.

What do you think about this circuit comment and for more electronic projects follow now.

Thank you

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