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:

New Circuits

.

 


Popular Circuits

infrared beam proximity detector
F232 is USB powered
Low Cost High Voltage Power Supply
high impedance input JFET/BJT buffer circuit
NE 555 & LM 567 Remote Control Circuit
Automatic Headlight Reminder
circuit to test servo motor (pole rotor) of parabolic antenna



Top