More about 5 volts DC power supplies
If you are looking for 5-volts DC regulator without transformer. This circuit may help you. It is suitable for low current digital. Use the MOSFET is based.
First choice of Fixed Regulator using family IC-78xx. It is easy to use, cheap, popular for a long time.
Many Fixed Regulator Circuits 5V,6V,9V,10V,12V 1A using IC-78xx series
Here is the 7805 5V voltage regulator datasheet the 7805 voltage regulator IC. They are designed to provide a constant 5V.
This is LM317 Low dropout regulator 5V 2A using TIP41, The voltage input is 5.1V DC is converted into 5V output,while maximum output current to 2A by TIP41 [...]
Here is circuit switching regulator 5V 5A for digital circuit.
Use IC LM2678-5.0 is High Efficiency 5V 5A Step-Down Voltage Regulator This is good power supply, small size and do not hot.