Wireless two-tone electronic doorbell circuit diagram


Posted on Feb 5, 2014

Transmitter: Pressing the SB will make the transmitter circuit work. D1, D2 and R2, R3, C4 constitute a low-frequency oscillator to control the audio oscillator composed of the D3, D4 and D5, D6, then it works alternately. The generated audio signal is added to modulation side of Rf signal oscillator by C7. Then high-frequency oscillator signal is sent to ai..


Wireless two-tone electronic doorbell circuit diagram
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    pic based oscilloscope clock
    buzzer circuit diagram
    PWM Lamp or Motor Controller
    GM Silverado: 2003 Chevy Silverado K1500 Ext Cab 5.3l V8 DTC
    Transistor Tutorial Power Amplifiers Part 4
    LIGHT SENSITIVE AUDIO OSCILLATOR
    Stepper Motor Project
    3D audio processing and application circuit LM4610



    Top