Audio Oscillator 2-Transistors

A simple direct-coupled oscillator with two transistors. (August 3, 2009)


Two transistor audio oscillator This circuit uses two transistors, two resistors and one capacitor. It is a direct-coupled oscillator and the frequency is determined by the capacitor and the 470k resistor.


Here is the bill or materials:


  • 1 470k resistor
  • 1 10k resistor
  • 1 0.01 uF capacitor
  • 1 3906 PNP resistor
  • 1 3904 NPN resistor
  • 1 8 ohms speaker

    This circuit can be modified to be used as LED flasher or a Simple Lie Detector


    audio Index
    Homemade Gramophone (Phonograph)> 


    If any information, data, picture or design infringes a copyrighted material, please send me an e-mail asking to remove it along with the supporting data.
    Some features may not work with Google Chrome. © 2006-2010 Jose Pino - Powered by JPC Alpha