What is a variable power supply?

What is a 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.

Is there a variable power supply?

Variable (or adjustable) power supplies are capable of delivering a variable output voltage or current. These power supplies fall into three categories: locally adjustable power supplies, remotely adjustable power supplies, and programmable power supplies.

How does a variable power supply work?

A power supply can be given from the battery or from a hardware circuitry which converts the AC supply into the DC supply or step-down AC to step-up AC and vice-versa. A variable power supply is one which facilitates the user to vary and adjust the desired output voltage and output current.

What is a variable DC source?

A variable dc power supply is one of the most useful tools on the electronics hobbyist’s workbench. This circuit is not an absolute novelty, but it is simple, reliable, “rugged” and short-proof, featuring variable voltage up to 24V and variable current limiting up to 2A.

What should I look for in a variable power supply?

Here is what you should consider when choosing adjustable DC power supply features:

• Linear output regulation.
• Multiple outputs.
• Control flexibility.
• Output enable/disable.
• PC control functions.

How do I build a variable power supply?

To make Variable DC power supply, you will required following list of components;

1. Transformer 220V to 30V ,2A rating.
2. Diodes.
3. High capacitance capacitor (1800uF)
4. Small capacitors for IC.
5. IC LM317.
6. Resistors of 500 ohms.
7. 1.5A fuse.
8. Probes .

What is variable AC power supply?

Various AC voltages are supplied by a transformer or an autotransformer. The power supply uses switches to change voltage when the transformer has multiple windings or taps. In other situations you use a variable transformer or adjustable autotransformer (also known as a variac) to change the voltage.

How do you find a DC supply variable?

What is the principle of variac supply?

Variac provides a voltage-adjustable source of alternating current (AC) electricity. A variable autotransformer is a single-coil transformer in which two portions of the same coil are used as the primary and the secondary.