hi all, i have project that to design and build power supply of 5V and 1A..ty

 

cool.. have fun

 

can you all help me out?

 

You need help designing one or you are just announcing the project?

 

The easy way is to buy a wall plug-in rated for 5 volts and 1 amp. Why do you want to design something so easy and cheap to buy?

 

Here is 34V one with supply for VU.

Basically you are going to need a transformer,rectifier bridge,voltage regulator,capacitors and resistors.

 

can you all help me out?

Yes we can, but we're not going to do your work for you. So provide us with your ideas and we'll analyze them for faults.

 

Here is 34V one with supply for VU.

Basically you are going to need a transformer,rectifier bridge,voltage regulator,capacitors and resistors.

I think D1 to D4 in the Bridge is connected wrongly...

 

Ah yes! The positive and negative routes are backwards.

You can call it, "diodes facing the wrong way" or you can call it, "the DC power lines are connected to the wrong ends of the bridge".

 

Yes you are right!

This is how the connections should go to the bridge.

 

I just bought two 5Vdc regulated wall-warts (ex-cell phone chargers) at my local thrift (recycle) store for 50cents each. A cup of coffee hereabouts costs 200cents. Why would I ever build one???

 

I just bought two 5Vdc regulated wall-warts (ex-cell phone chargers) at my local thrift (recycle) store for 50cents each.

Unfortunately, even using both your chargers wouldn't give the current the OP wants. He would probably need 8 of them.

 

Sure they will, he said he wants a 1A rating, and that's what most of those things are these days.

 

Sure they will, he said he wants a 1A rating, and that's what most of those things are these days.

I'm surprised that they offer so much current since the phones don't charge at that rate.

 

I'm surprised that they offer so much current since the phones don't charge at that rate.

The ones I bought are rated at 5Vdc 1A. Input can be anything from 100Vac to 250Vac either 50 or 60Hz. Made by Samsung.

 

A standard iPhone charger is 1A, and the phone does charge at that rate.