How do you build a 5.0V regulated power supply?

[johny_doe]

i am stuck. i have no idea how to start on this project. I have to build a power supply that produces 5.0V regulated. i can't use regulators so i have to build it but i have no idea how to get started. i have an ac course to start with. i would appreciate any ideas, insights or designs you might have.

 

[berkeman]

What do you mean that you "have an ac course to start with"? Does that mean that you have taken an AC electronics course in school, or does that mean that you need to design and build your power supply to run off of the AC mains 120/240Vrms power?

What topologies are you considering for your design? When you "have no idea how to start on this project", a good starting point would be your textbooks, or wikipedia.org:

http://en.wikipedia.org/wiki/Power_supply

 

[piercas]

Building a 5.0V regulated power supply requires a basic understanding of electronic components and circuits. The first step is to gather all the necessary materials, such as a transformer, diodes, capacitors, and a voltage regulator IC.

The transformer is used to convert the AC voltage from the power outlet to a lower AC voltage. This lower AC voltage is then rectified by the diodes to produce a pulsating DC voltage. The capacitors are used to filter the pulsating DC voltage and smooth it out to a constant DC voltage.

Next, the voltage regulator IC is used to regulate the DC voltage to a stable 5.0V output. The most common voltage regulator IC used for this purpose is the LM7805. This IC has three pins – input, ground, and output. The input pin is connected to the filtered DC voltage, the ground pin is connected to the ground of the circuit, and the output pin provides the regulated 5.0V output.

To ensure a stable and accurate 5.0V output, it is important to choose the right value of capacitors and resistors for the voltage regulator IC. These values can be calculated using the datasheet of the voltage regulator IC. Additionally, it is important to pay attention to the orientation of the components and to properly solder them onto a circuit board.

It is also important to consider safety measures while building the power supply. This includes proper insulation and grounding to prevent electric shocks.

In conclusion, building a 5.0V regulated power supply involves understanding the basic principles of electronic components and circuits, choosing the right materials, and following proper safety measures. If you are still unsure, there are many online resources and tutorials available to guide you through the process. Good luck with your project!