Speech amplifier circuit


Posted on Feb 4, 2014

This circuit given here can be housed in the box containing the speaker to form a handy microphone amplifier. The device can be used by teachers, guides, lecturers etc for speaking in a crowdy or noisy environment. The circuit is designed base on the audio power amplifier IC TDA 7052. The IC can deliver a maximum power output of 1. 2 W at a 6V supply. T


Speech amplifier circuit
Click here to download the full size of the above Circuit.

he audio signal from the microphone is pre amplified by the amplifier based on Q1 (BC 547) and give to the input of IC1 (pin 2). The POTR5 acts as a volume control. The capacitor C3 is used to bye pass the upper frequencies in order to avoid the Larsen`s effect(the microphone picking up speaker output to cause howls).




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    PlayPIC Tutorial
    Advanced LED Flasher with 555
    Intercom
    Tv modulator
    How Discrete Voltage Regulator with Current Limiter Works
    headphone monitor amp
    Inexpensive Remote Watering System
    USB Joystick
    Crosswalk Pedestrian Signal and Homemade Controller
    Examples OFDM modulation system circuit
    Astable multivibrator
    Car or room timer alarm circuit diagram



    Top