AC Line powered LEDs


Posted on Feb 7, 2014

The circuit below illustrates powering a LED (or two) from the 120 volt AC line using a capacitor to drop the voltage and a small resistor to limit the inrush current. Since the capacitor must pass current in both directions, a small diode is connected in parallel with the LED to provide a path for the negative half cycle and also to limit the reverse voltage across the LED. A second LED with the polarity reversed may be subsituted for the diode, or a tri-color LED could be used which would appe.


AC Line powered LEDs
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    On/Off Touch Switch
    one time only burglar alarm
    Lowest Phase Noise PLL Synthesizer Using Fractional-N Technology
    CMOS Integrated Switched-Mode Transmitters for Wireless Communication
    motor switch led circuit



    Top