Introduction: Simple Basic Audio Amplifier

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Music may be a vital thing. it's how to precise emotions,

I personally hear tons of music. this is often my secret for my energy. Even I’m taking note of music while writing posts for you guys. So, let’s jump into our topic Basic amplifier with Transistor (IRFZ44N N-Channel MOSFET).

How does amplifier Circuit work?
The circuit works within the basic concept of Transistors. Low-frequency audio signals came from Audible devices. This signal is just too low to listen to with a Speaker. Here one transistor is employed so it means it can only give the mono output.

If you would like Sterio output then you've got to use 2 IRFZ44N N-Channel MOSFETS. Suppose we are talking about the left signal. The left signal has 2 wires one may be a Left Signal Wire and another is GND. The GND wire is the same for both the Left and Right channels. But the channel wire is different for various channels. The signal wire goes into the Transistor’s Gate Pin.

Now the Transistor Switches On and off for the resultant frequencies. For this, the Transistor’s Drain and Source voltage differ. For this, the tiny signals are going to be amplified. and therefore the bandwidth also will be high. Now we will hear the loud sound from the speaker.


Step 1:

Here are Some Pictures for creating the Circuit. I even have made the straightforward Basic amplifier Circuit within the PCB for creating the circuit as simple as possible. you'll also make the circuit within the Breadboard. But there could also be loose connection So I even have Directly Soldered all Components. So, there'll not be any loose connection.

Step 2:

Step 3:

Step 4:

Step 5: Circuit Diagram


This is an easy Circuit. So there are some disadvantages to the circuit. That’s why this circuit isn't for application purposes.

There is no noise cancellation within the circuit. So, you'll find extra humming noise within the amplifier. This amplifier can offer you a hearable sound but not an excessive amount of loud sound. This is a Mono amplifier. you'll make it Stereo by just using an equivalent other circuits.

There is an excessive amount of loss within the circuit. this is often not power efficient. So nowadays Home theaters and other Music Systems use the category D amplifier. the category D amplifier has an efficiency of 80 to 90%. The Basic and popular class D amplifier is PAM8403.

It can drive 2, 5W Speakers with ease. It can provide a maximum of 10W outputs. and therefore the main thing is that the board doesn’t need high voltages. It can run with 3v to 5V Power. it's great for portable Bluetooth Speaker Systems.

But beat all, it's an excellent circuit for a hobbyist. they will practice the circuits for fun.