0 12v Variable Power Supply Circuit Diagram

Many years ago i built a first variable power supply using lm317.

0 12v variable power supply circuit diagram.

Moreover the maximum output voltage may not be restricted to just 12 volts rather can be extended up to 32 volts continuously variable by just modifying the transformer. Second the output current up to 3a. Third adjust the output voltage of 1 25v to 20v. As shown in schematics the variable voltage of 1 5 to 24v is mapped to 0 4 5v by using potential divider circuit since our arduino can only read voltages from 0 5.

It is actually very similar to most of the lm317 based power supply with some key difference. Simply said it is a power supply that can adjust the output voltage or current. Instead of using batteries which have a limited lifetime a variable dc power supply can be used which is implemented in this project. First it is a high quality power supply.

For smaller voltages we normally use batteries as a reliable source. 0 1v to 50v variable power supply received by email 01 21 2009. Use lm723 as a voltage regulator designed primarily for series regulator applications. It will keep a stable voltage when it has any load.

The output voltage 0 30v and a maximum current of 5a. Building the proposed circuit of 0 to 12 volt adjustable dc power supply is so simple that it may be even assembled even by a any electronic noob within half an hour. This is a 0 12v variable power supply circuit at 3 amp. What is a variable power supply.

It is a charge pump circuit used to create a low power negative dc voltage source. Adjustable power supply circuit. A variable dc power supply is very important for electronics projects prototyping and hobbyists. Now i have still used it.

In a normal circuit the general lm350 regulator has a start voltage of 1 25v. The filtered 12 volts dc output is generated the simple transformer based power supply circuit output is 12 volts fixed dc the output is not variable it is fixed 12 volts dc voltages these dc voltages can be utilized in any dc operated 12 volts project like running a 12 volts motor any circuitry that need 12 volts dc a dc fan charger etc this can be used as dc adapter a 12v dc adapter circuit. But if you need to use a 3a adjustable voltage regulator. In the circuit with the components value makes the output voltage range of approximately 1 25 to 13 5 volts.

This power supply circuit is highly stabilized that its output voltage will drop only 0 005 even though the. This below circuit is suitable for you with 5 important reasons. The picture above is the circuit diagram of the power supply. But it still has the same characteristics as a fixed regulated power supply.

The complete circuit of this variable power supply is shown below follow the schematics and solder you components accordingly. Transistor variable power supply 1a 0 30v.