puff to off circuit


Posted on Feb 6, 2014

This is a circuit diagram of a simple circuit in which the LED burning can be activated only by a gust OFF. A condenser mic (M1) is used to feel your breath. When the S1 button is pressed, transistors Q2 and Q3 as a couple wires attached will be activated and drives LED shines. LED remains in this condition. When you puff on a condenser mic, the s


puff to off circuit
Click here to download the full size of the above Circuit.

ound pressure converted into a voltage signal at the output. This voltage signal is amplified by the transistor Q1. Since collector of Q1 coupled to the emitter of the pair attached, the couple will stop doing as there ever was a signal from a condenser mic for panting and the LED will go OFF. Push button switch S1 should be pressed again to turn the LED ON. The following is a schematic drawing:




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Litter Box with 12V pc fan
    Lead Acid Battery Charger III
    Lithium Ion Lithium Poly Charger by LM317
    Remote-Controlled Fan Regulator
    Simple 10W audio amplifier
    6 x 6 Loop Antenna
    Switch-Mode Power Supply
    GSM Remote Control MotherBoard Schematic
    AUDIO OSCILLATOR
    Using LVDS serializer/deserializer devicesm
    PQY1 series magnetic disk control circuit control



    Top