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220 V LED Indicator Circuit

Last Updated on May 4, 2020 by Admin Leave a Comment

This LED circuit can be used to indicate the presence of 220 V mains AC supply, without using a transformer.

The long life of LEDs make them extremely appropriate for on/off indicators.

On the other hand, their use on mains voltages has been constrained considering that a low functioning voltage avoids their direct connection with the mains supply in terms of a neon.

led mains 220 V indicator circuit

Thankfully, there exists a method with this issue, the AC resistance of a capacitor enables you to limit the current.

No power is lost in the capacitor by any means, considering that the current passing through the capacitor and the voltage around it are 90° out of phase with regard to one another.

Zener diode D2, performing as an normal forward biased diode in this situation, stops excessive voltage levels appearing over the LED throughout the negative half-cycle of the mains waveform.

If this 220 V mains LED indicator circuit is switched on in the positive half, D2 stop the voltage across LED Dl and Rl from rising over 2.7 V.

If an ordinary diode were utilized at this point, as in the earlier circuit, the LED will probably proceed to the big scrap box in the sky.

The importance of CI can help determine the current passing

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About Admin

Hey friends, Thanks a bunch for stopping by this site! I am an engineer with a Bachelor of Engineering in Electronics and Telecommunication. One of my passions is gathering information from all sorts of electronics books and tutorials. I then take that information and compile it into a language that is super easy to understand. My goal is to make those complex electronics circuit concepts and technical terms much more accessible for all the new and budding electronics engineers out there. I can also design customized circuit diagrams as required by the users.
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