What Is a 24V Power Source?

DC power sources power computer hardware.
••• power supply image by robert mobley from Fotolia.com

Electricity is the flow of electrons. The number of electrons flowing is determined by the force (measured in volts) pushing them. Twenty-four volts is a common power requirement for small devices, but it is not a readily available power source.

AC and DC power

Direct Current (DC) is characterized by a steady, level and consistent flow of current in one direction. This is exactly what most small electrical devices require. Alternating Current (AC) is current that periodically reverses direction in predictable cycles. AC works better for transmitting electricity, so the electricity coming out of the wall is AC. DC mainly comes from batteries.

24 Volt AC supplies

To get a 24 volt AC power supply it is only necessary to have an electrical device called a transformer. These devices "transform" AC voltages (they do not work for DC) from one voltage level to another. They are the chunky things on your cell phone chargers that step down the AC coming out of the wall to a level that the cell phone needs.

24 volt DC power supplies

Twenty-four volt DC power supplies require something more complex than a transformer. There are electrical circuits called "rectifiers" that consist of several parts that can transform AC to DC and adjust the voltage level at the same time. These circuits are built into devices like computers and televisions that need 24 volts of DC but have access to the 120 AC that comes from the wall.

Related Articles

What is DC Power Supply Used for?
What Is the Difference Between a Transformer & a Rectifier?
How to Convert Amps to HP
How to Calculate Transformer Primary Current
How to Calculate CT Ratio
How to Calculate KVA to MVA
How to Calculate 30 KW to Amps
How to Convert 12 Volt Alternator to 120 Volts
How to Make Electricity Flow Like Lightning Between...
How to Convert Watts to Volts
What Is the Difference Between Resistive & Inductive...
How to Convert Ohms to Kilowatts
How to Convert 12 Volt to 6 Volt
How to Convert HP to Amps & Volts
What Is the Difference Between Conducted & Radiated...
How to Convert Square Meters to Square Feet With a...
What Is the Difference Between an Inductor & a Choke?
How to Calculate Electrical Transformer Output
How to Regulate DC Power With Resistors
How to Test DC Motors

Dont Go!

We Have More Great Sciencing Articles!