Audio Level Meter Circuit LM3915


Posted on Feb 6, 2014

This meter circuit uses just one IC and a very few number of external components. It displays the audio level in terms of 10 LEDs. The input voltage can vary from 12V to 20V, but suggested voltage is 12V. The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs providing a logarithmic 3 dB/step analog dis


Audio Level Meter Circuit LM3915
Click here to download the full size of the above Circuit.

play. LED current drive is regulated and programmable, eliminating the need for current limiting resistors. The IC contains an adjustable voltage reference and an accurate ten-step voltage divider. The high-impedance input buffer accepts signals down to ground and up to within 1. 5V of the positive supply. Further, it needs no protection against inputs of 35V. The input buffer drives 10 individual comparators referenced to the precision divider. Accuracy is typically better than 1 dB.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Inductance Bridge
    Automatic light activated switch circuit
    motion motor control servo system block
    30 watt power fm transmitter with 2sc1946a circuits
    door bell circuit
    Pic Circuits
    1W FM Transmitter Circuit
    60 Light Sequencer using a Matrix
    Captret and Tesla switch
    Electronic fishing shrimp machine circuit diagram 2
    555 new digital thermometer circuit diagram
    Microcontroller Based Telephone Remote Control Circuit



    Top