Introduction
In this article I will show you How To Make Simple Class A Audio Amplifier Circuit . In this circuit we will use TIP122 or TIP127 Transistor , Resistors, capacitors and some supporting components to give you much more power. I will show you the complete process of making this circuit step by step.
Components Details
- Transistor TIP122
- Transistor TIP127
- Resistor 150k
- Capacitor 470uf
- Capacitor 1uf
- Speaker
- Audio Jack
- Battery 12volt
Tip 122 Pinout
Tip 127 Pinout
Circuit Diagram
Explain Working Of Circuit
The working of this high-power amplifier is similar to any ordinary amplifier circuit. What makes this circuit unique is the robust and high-power TIP122/127 Darlington transistor pair. The audio input taken from a normal audio transducer such as a mic serves as a DC control signal for transistor Q1. Here, a capacitor (47uF) blocks the DC component, allowing only the AC component of the signal to pass through. Transistor Q1 amplifies the signal and sends it to the base of transistor Q2.
The TIP127 further amplifies the input signal and directs it to an audio output device such as a loudspeaker. This circuit can be easily operated using 12V DC power supply.
Applications
- Generally functions as an integral part of high power speakers & music equipment.
- They have also found their way into militaristic applications such as acoustic weaponry.
- Widely used in sound systems such as speakers, high-power megaphones & large-scale acoustic systems.