Audio Level Meter


Posted on Feb 6, 2014

This is audio meter that can be monitored using a small panel meter with this circuit built from discrete components. The audio level meter circuit has a flat frequency response from about 20Hz to well over 50Khz. Input sensitivity is 100mV for a full scale deflection on a 100uA meter. Built on two common emitter amplifiers, the first stage has a


Audio Level Meter
Click here to download the full size of the above Circuit.

preset resistor which may be adjusted for a FSD. The last stage is biased to operate at roughly half the supply voltage for maximum ac voltage swing. Audio frequencies are passed through the 10u dc blocking capacitor and the full wave bridge rectifier converts the signal to a varying dc voltage.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Radio Glen Transmitter
    Delayed start for mains equipment
    Telephone status monitor
    Electronic phone bell
    Contactless air range finding method on the basis of P89LPC932
    DS1621 IIC interface under Linux drives designing
    BA1451F Am Radio / Fm If Stereo System Ic
    2002 Chevy Cavalier heater/AC temp control wont light up at nite



    Top