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# How do I create a variable power supply?

## How do I create a variable power supply?

Circuit Diagram Variable Power Supply Circuit The main supply of 220V is fed directly to the centre tapped transformer. This transformer step downs the 220V supply to 24V which is then rectified through a bridge rectifier. The bridge rectifier gives a continuous pulsating DC signal.

### Why do we need LM317?

The LM317T is an adjustable 3-terminal positive voltage regulator capable of supplying different DC voltage outputs other than the fixed voltage power supply of +5 or +12 volts, or as a variable output voltage from a few volts up to some maximum value all with currents of about 1.5 amperes.

What is variable power supply?

A variable power supply is one which includes some means for the user to easily adjust the output voltage and sometimes the current. Adjustment is most often accomplished with a potentiometer, but may also be done with an analog control voltage, a digital input, an autotransformer, etc.

What is a variable power supply?

## What is the output voltage of a lm317t power supply?

Variable Voltage Power Supply. The LM317T is a fully adjustable 3-terminal positive voltage regulator capable of supplying 1.5 amps with an output voltage ranging from around 1.25 volts to just over 30 volts.

### What is the output voltage of lm117 positive voltage regulator?

The LM317 or LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to the 37V output range, And has many special features that I like are : Output Voltage Tolerance 1% Line Regulation 0.01%

What is the output voltage of the 317?

The 317 is a monolithic integrated circuit with adjustable 3-terminal positive-voltage regulator designed to supply more than 1.5 A of load current with an output voltage adjustable over a 1.2 V to 37 V range.

What is the best variable power supply with a single IC?

But this circuit can be created with a single IC is lm317 based variable power supply. The LM317 or LM117 series of adjustable 3-terminal positive voltage regulators is capable of supplying in excess of 1.5A over a 1.2V to the 37V output range, And has many special features that I like are :