Reverse Bias Oscillators


Posted on Feb 5, 2014

There are a number of npn transistors that will oscillate in the audio range when reverse biased. Minimum supply voltage is 7V for low power transistors such as BC109, BC238 and 2N2222A, it becomes 12V for medium power transistors such as BD139 and is 16V for power transistors as BUX22 and 2N6543. Current drain is 4mA at 9V and frequency of oscill


Reverse Bias Oscillators
Click here to download the full size of the above Circuit.

ation is 550Hz. The base is normally left open.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Parallel port provides high-resolution temperature sensing
    Loop antenna for 187 KHz
    Auto-alarm
    Variable-strobe-light
    Autonomous Parallel Parking RC Car
    RGB LED Strip Circuit with Arduino
    Automation of Lamp Relay Controlled with RF
    BATTERY MONITOR
    arduino based thermorbios weather station receiver
    sine wave generation with fast pwm mode 2525
    NE568 NE568A;SA568A 150MHz Phase-locked Loop
    Transcutaneous Electrical Nerve Stimulator (TENS)
    G0BSX BSX2 packet radio
    Changes inductive boost LED Driver
    High-performance recording front end circuit



    Top