transistors Controlling LED with 300mV AC signal


Posted on Feb 6, 2014

Control a LED with audio signal, but the problem is, that output signal is only 150mVpp (with 150mVpp positive offset). In my understanding, it needs to be higher than 0. 6V to get the transistor running, therefore I am not sure what to use instead. Do I maybe need an opamp in the middle Any tips By `control an LED`, do you meanthe LED should be on


transistors Controlling LED with 300mV AC signal
Click here to download the full size of the above Circuit.

when there is an audio signal, and off when there isn`t, or something more sophisticated such as intensity controlled by signal strength Anindo Ghosh May 11 `13 at 13:22 +1 to counter the drive-by down-vote. If there`s a need for a downvote, please consider leaving a comment explaining why, it helps new members improve their questions (and answers) for the future. Anindo Ghosh May 11 `13 at 13:29




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Speakers
    digital voltmeter circuit diagram
    HT7070A Voltage Detector
    USB PICKit2 programmer



    Top