Simple 2 Transistor Headphone Amplifier


Posted on Feb 7, 2014

This is the schematic diagram of very simple headphone amplifier circuit. The circuit built using two NPN transistors. You can use transistor BC549C or other NPN transistors such as European equivalent: BC548C, BC547C, BC239, 2N5818 or 2N2222 An audio amplifier is an electronic amplifier that amplifies low-power audio signals (signals composed pri


Simple 2 Transistor Headphone Amplifier
Click here to download the full size of the above Circuit.

marily of frequencies between 20 - 20 000 Hz, the human range of hearing) to a level suitable for driving loudspeakers and is the final stage in a typical audio playback chain. The preceding stages in such a chain are low power audio amplifiers which perform tasks like pre-amplification, equalization, tone control, mixing/effects, or audio sources like record players, CD players, and cassette players. Most audio amplifiers require these low-level inputs to adhere to line levels. While the input signal to an audio amplifier may measure only a few hundred microwatts, its output may be tens, hundreds, or thousands of watts. More explanation about power audio amplifier can be found at wikipedia. org This is a video tutorial about how to a very simple audio amplifier based on the LM386 amplifier chip. It can be built for less than $20 (or might be less than $8 in some countries) and used to amplify any low level audio signal including a guitar, bass or mp3 player.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Digital Storage Oscilloscope Adapter
    Circuit monitors blinking phone lights
    Light-Beam Alarm For Intrusion Detection Circuit
    high impedance input JFET/BJT buffer circuit
    How to Make a Simple Reverse Forward LED Light Chaser Circuit Using IC 4017
    led flashing circuit
    gas leakage alarm
    Schematic Diagram LM4992 bassed Stereo audio power amplifier circuit and explanation
    Servo Motor Control Circuit
    74S124 High Frequency VCO with Varactor
    Class D Audio Amplifier Design TDA7498
    Inverting monostable circuit diagram



    Top