I would like to find any kind of rectifier bridge data sheet which can convert 220AC to 12V and 5V. However, I am hardly to find any of this. Can anyone provide me with the circuit.
P.S. The rectifier bridge is for small electric appliance
Such rectifier bridge would use thyristors and control circuit. But I think you should use transformer to change voltage from 220V to 12V and 5V. Then you will use ordinary bridge rectifier. It is cheaper and simpler.
Yes, you need a transformer to drop the voltage, then a bridge rectifier to rectify it. There are various crude methods of dropping the voltage, but mostly only for very low power loads, and they are somewhat dangerous!.
I would like to convert AC voltage(220ACV) to DC voltage(12DCV) first. Then I use transformer to step down the 12 V to 5 V. Do you have any comment on this idea?
It depends on how much current is drawn,on 5v side.
Personally I would use a 7805 voltage regulator tapped directly into the rectified 12v supply.(of course, after the filters)
It has always worked for me.
I would like to convert AC voltage(220ACV) to DC voltage(12DCV) first. Then I use transformer to step down the 12 V to 5 V. Do you have any comment on this idea?
You know that what he means , he wants a 12vdc supply rail, and a 5vdc supply rail.
The way I suggested is proper.
If he wanted 10vac, I'm sure he would of stated it.
He is lost thinking he has to transform the mains and then transform again to get dc 12v and then again for 5vdc.
I would like to convert AC voltage(220ACV) to DC voltage(12DCV) first. Then I use transformer to step down the 12 V to 5 V. Do you have any comment on this idea?
Transformers ONLY work on AC, and they are one of the most efficient electronic components you can use - so your idea is rubbish!. Use a transformer directly from the 220V down to what you want - cheap, efficient, and easy.
I would like to find any kind of rectifier bridge data sheet which can convert 220AC to 12V and 5V. However, I am hardly to find any of this. Can anyone provide me with the circuit.
P.S. The rectifier bridge is for small electric appliance
Sorry, i am so late to come....I think you are all professionals and I am a little bit shame on me.
I have found one named "TOPSwitch-GX" which can help me to fulfill my objective. I have use the provided circirt to step down 220ACV to 12DCV with 2.5A. Then I use voltage regulator to convert 12DCV to 5 DCV with 1A. I think I have found the answer I wanted. Thank you all brothers~
The Topswitch-GX is a component for use in Switch-mode power supplies (SMPS). It is intended for use by professional SMPS design engineers. Not a toy for hobbyists! It will not transform 230VAC to 12VDC!!!
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If you do not have electronics education, i SRONGLY RECOMMEND QUITTING POWER SUPPLY TWEAKING BEFORE YOU SET YOUR APARTMENT BLOCK ON FIRE OR HURT YOURSELF.
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For those who have the basic knowledge and some experience in electronics,
I have drawn a conventional regulated power supply you can use: go to **broken link removed**
THE MOST IMPORTANT PART OF A POWER SUPPLY IS THE FUSE AT THE INPUT. IT MUST HAVE APPROPRIATELY LOW AMP RATING, TO PREVENT THE RISK OF FIRE.
For small current consumption devices it is usually OK to use 100mA/250V fast or 50mA/250V slow-blow fuse.
The primary of the transformer and the fuse are at DANGEROUS voltage (see dotted box in schematic).
All components on the low voltage side of the transformer must be well separated from the MAINS VOLTAGE SIDE TO PREVENT ACCIDENTAL SHORT CIRCUIT TO MAINS VOLTAGE AND RISK OF ELECTRIC SHOCK.
Most commercial plug-in adaptors have the same circuitry up to C1. So if you have such an adaptor with 18VDC to 24VDC output, you only need to insert the C2-C4 and the 2 regulator ICs and you're done.