PWM to vary the light intensity of a 220V bulb

Posted on Feb 4, 2014

220V bulb where one end of the relay is connected to the 220V dc and the other end to ground; and is switched one to the other using the output of a PWM as shown in the block diagram below: However, I am afraid that this is a poor design and not safe: no transformer to lower down the ac voltage (so I can drive the 220V bulb);

PWM to vary the light intensity of a 220V bulb
Click here to download the full size of the above Circuit.

and in effect, other components might blow up.

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