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help to make Power Supply Circuit!!!!

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hbaocr

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I do need one Simple DC POWER SUPPLY CIRCUIT . DC Power supply have input voltage:220VAC±10% /50HZ and the output voltage is 5VDC and current ouput ≥450ma.
Please help me to make that circuit without using transformer.
 

IanP

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http://ww1.microchip.com/downloads/en/appnotes/00954a.pdf

A couple of things that you have to be aware of: to generate ≈0.5A in this way you will have to use ≈7µF capacitor rated for 250Vac, 5.1V Zener diode has to be rated for at least 5W .. and so on, and so on .. so, the whole circuit can become quite bulky, as far as physical sizes of required components are concerned ..
And, of course, no isolation form 220Vac :!::!::!:

Regards,
IanP
 

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