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Noise in any DC power supply is hard on the the parts in a device, and can also lead to noise, errors, malfunctions, and damage to the appliance in certain cases. This is commonly used in wall warts and power supplies in automobiles leading from the alternator. The hum found on radios in automobiles is largely the result of a poor smoothing circuit.
'Smoothing' of AC ripples can be accomplished through many means, and are much more powerful when combined.
A bridge rectifier converts the AC signal from a wall or alternator into a voltage-varying positive wave. It basically takes the sine wave and flips the bottom half up into the positive range. This is what is responsible for the unwanted effects that need to be removed by a smoothing circuit in order to supply clean power to your appliances.
Capacitors filter out the AC component by literally grounding it, while allowing the DC component to pass through unobstructed. By adding a large capacitor in parallel to your circuit's output, it fills over time and supplies a steady DC output, filling in the drops in voltage with its stored charge.
Solenoids in series can maintain a steady current, and can also be used with a LC filter circuit to attenuate unwanted frequencies passively (such as the 60/120 Hz hum from a wall outlet). Passive filters are extremely inefficient. Op-amp based active filters are much more effective at removing noise frequencies, in-circuit.
Zener diodes are placed reverse-biased, in parallel to the appliance source voltage. These break down at a specific voltage to ground out unwanted voltage spikes and other over-voltage conditions, protecting the more sensitive components of the appliance in the process. These are usually not a good substitute for a fuse.
A voltage regulator can be used to supply a fixed voltage - more appropriate for digital circuits- at the expense of efficiency. This is generally an IC (integrated circuit) with three pins: input voltage, ground, output voltage. They require a heat-sink because they can get very hot.
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For what are high voltage power supplies typically used for?
High voltage power supplies have many uses. It is most commonly used to supply power from a device to the circuit. These are great for people who need to supply their house with power.
What three things are needed to make a complete electrical circuit?
The first part is that you need a power source. The second thing is that you need a load. The third thing is that you need the power cables.
How do you make power supply variable?
A variable power supply is one whose output voltage (or current) can be adjusted and therefore set to a desired figure. They are used in development and design odf circuits, eliminating the need for possibly many power supplies of different output voltages. Once a circuit is connected to it, the output would not normally be changed.
Why should you not wear an antistatic wrist strap to repair power supply?
The problem here is that you may encounter high voltages in the power supply. So wearing an antistatic wrist strap may put you at a greater risk of electric shock. Besides, there are few if any sensitive electronic components inside the power supply unit.In addition, make sure the power supply is not connected to any power before servicing it. If you need to go near any large capacitors, you will want to discharge them. In fact that is a good precaution to take any time you remove the circuit board from the power supply unit.
Why does an operational amplifier need a power supply?
It doesn't. You can make a differential amplifier with a single power supply.
How is the voltage of the power supply for a series circuit calculated?
The circuit by itself doesn't determine the voltage of the power supply. If there's some additional requirement that goes along with the circuit, such as "The current through the circuit must be XYZ amperes.", or "The voltage across the third component from the north end of the circuit shall be ABC volts,", then that requirement would dictate the power supply voltage. But in order to calculate it, you'd need the knowledge of every component in the series circuit.
For what are high voltage power supplies typically used for?
High voltage power supplies have many uses. It is most commonly used to supply power from a device to the circuit. These are great for people who need to supply their house with power.
How is it possible your power supply is faulty multimeter test says acceptable?
A multimeter draws next to no current, so will not effectively test the power supply under load. The voltage on the meter is averaged out and so will not show ripple current, or spurious dips in the supply. You will need an oscilloscope to check for ripple current (poor smoothing) and the supply needs to be under a load.
Why do you need to connect a pin between vcc and ground?
You would not want to connect Vcc and Gnd together. That would short circuit the power supply.
What three things are needed to make a complete electrical circuit?
The first part is that you need a power source. The second thing is that you need a load. The third thing is that you need the power cables.
What kind of convert do you need to run a 12 volt impact wrench from a house circuit?
You need a fairly powerful DC power supply capable of delivering 12V at some amps.
What kind of converter do you need to run a 12 volt impact wrench from a house circuit?
You need a fairly powerful DC power supply capable of delivering 12V at some amps.
How do you get half of the voltage from a DC supply circuit?
By using a voltage divider, that is two resistors of the same value in series across the DC supply. Half of the supply voltage will be at the point where the two resistors is connected. But how much wattage of those resistors is also an issue.
How do you make power supply variable?
A variable power supply is one whose output voltage (or current) can be adjusted and therefore set to a desired figure. They are used in development and design odf circuits, eliminating the need for possibly many power supplies of different output voltages. Once a circuit is connected to it, the output would not normally be changed.
What to do if the power supply is too low?
Obtain a power supply that has the correct output voltage that you need.
Need for cost effective regulated power supply?
yes there is a need for cost effective power supply like solar energy
When do you need to replace the computer power supply?
When your computer will not power on. When the cooling fan of the power supply has failed. When the amount of hardware in use in your case exceeds the power capability of your power supply.
