Simple 1 Watt Led Driver Circuit Explained - Mains Operated

LEDs, white LEDs in particular are getting very popular day by day, simply because these are outstandingly efficient as far as their illumination is concerned.
We have all probably seen white LEDs, even the ordinary ones are pretty efficient with their light producing abilities.
Even an ordinary white LED is able to produce lights which are dangerous when looked directly into them, so intense it can be.
1 watt LEDs are more advanced form of LEDs because these are absolutely small with their dimensions and yet when lit can produce very powerful illuminations at point brightness.
However these LEDs as

usual cannot be operated with ordinary power inputs.
White LEDs have their own operating specs which if not maintained will simply result in the frying of the device.


Making a 1 watt LED driver can be considered difficult especially when required to be operated from the mains 220V or 120 V supplies.
A very simple circuit which has been modified and designed by me can be

constructed at home.
The concept employs a transformerless power supply incorporating a high voltage capacitor for dropping the mains current at thee desirable levels.
However as we all know that a high voltage capacitor can at times produce lethal surge voltage which can instantly damage the involved electronics.
Connecting an MOV is a good proposition, but these are a bit costly and here we are interested in making a cheap version of a 1watt led driver yet should be very safe and long lasting.
An innovative approach has been employed in this circuit especially developed by me.
An introduction of a high voltage capacitor just across the LED takes care of all the surges that might creep in during power switch ON. The concept makes sure that the main drawback of using a capacitive power supply for driving an LED is nullified.

Article Written By Swagatam

Swagatam is a blogger at

Last updated on 25-07-2016 672 0

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