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Linear and switching power supplies circuits design

Linear and switching power supplies electronic circuits design projects and schematics.

5v power supply LTM8021

This 5v power supply circuit is designed using the LTM8021 and will provide a maximum current up to 500mA. Almost all required parts are included in the LTM8021 package.
This 5v power supply circuit based on the LTM8021 operate over a input voltage range between 3V and 36V .

Circuit Diagram: 
5v power supply LTM8021
Electronic Circuits: 

LM317 30v variable power supply circuit

This 30v variable power supply circuit is based on lm317 voltage regulator circuit . This LM317 30v variable power supply circuit can deliver high current (around 5 amps) and variable output voltage between 1.2 volts, up to 30 volts. The led D3 mounted on pin 6 at lm301 lights in constant current mode . Current limit can be adjusted using R2 potentiometer and the output voltage can be adjusted from 1.2 volts to 30 volts using R8 potentiometer . Input voltage for this variable power supply must be around 35 volts .

Circuit Diagram: 
LM317 30v variable power supply circuit
Electronic Circuits: 

LM723 variable power supply circuit

Using LM723 regulator can be designed a very simple variable power supply circuit which can provide a maximum current up to 2A and a variable voltage between 2 and 25 volts.
This 25v variable power supply is designed using a LM723 regulator and a few common electronic components.
Input voltage must be between 28 and 37 volts. Mj3000 transistor must be mounted on a radiator for heat dissipation.

Circuit Diagram: 
LM723 variable power supply circuit diagram
Electronic Circuits: 

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