Voltage. Medical search. Frequent questions

A voltage regulator may use a simple feed-forward design or may include negative feedback . (wikipedia.org)
A simple voltage/current regulator can be made from a resistor in series with a diode (or series of diodes). (wikipedia.org)
Since the forward voltage of a diode is small, this kind of voltage regulator is only suitable for low voltage regulated output. (wikipedia.org)
If the mechanical regulator design is sensitive to small voltage fluctuations, the motion of the solenoid core can be used to move a selector switch across a range of resistances or transformer windings to gradually step the output voltage up or down, or to rotate the position of a moving-coil AC regulator. (wikipedia.org)
Early automobile generators and alternators had a mechanical voltage regulator using one, two, or three relays and various resistors to stabilize the generator's output at slightly more than 6.7 or 13.4 V to maintain the battery as independently of the engine's rpm or the varying load on the vehicle's electrical system as possible. (wikipedia.org)
Often a voltage regulator module converts from 5V or 12 V or some other voltage to whatever CPU core voltage is required by the CPU. (wikipedia.org)
Using a voltage regulator , the external I/O voltage levels was transformed to lower voltages to reduce power draw, resulting in less heat for the ability to operate at higher frequencies. (wikipedia.org)
The voltage regulator is the "brain" of your car's electrical system. (kanter.com)
Replace your voltage regulator and be sure! (kanter.com)
Regulator Domains: is the new current limit within the regulator operating parameters for input/output voltage. (kernel.org)
This uses a similar API to the kernel clock interface in that consumer drivers can get and put a regulator (like they can with clocks atm) and get/set voltage, current limit, mode, enable and disable. (kernel.org)
This interface is for machine specific code and allows the creation of voltage/current domains (with constraints) for each regulator. (kernel.org)
This compact (0.45″×0.6″) U1V11A switching step-up (or boost) voltage regulator efficiently boosts input voltages as low as 0.5 V to an adjustable output voltage between 2 V and 5.25 V . Unlike most boost regulators, the U1V11A offers a true shutdown option that turns off power to the load, and it automatically switches to a linear down-regulation mode when the input voltage exceeds the output. (pololu.com)
This adjustable boost (step-up) voltage regulator generates higher output voltages (between 2 V and 5.25 V) from input voltages as low as 0.5 V, and it also automatically switches to a linear down-regulation mode when the input voltage exceeds the output. (pololu.com)
The boost regulator has four connections: shutdown ( SHDN ), input voltage (VIN), ground (GND), and output voltage (VOUT). (pololu.com)
0.8 V, SHDN voltage must be below 0.1×VIN to disable the regulator and above 0.9×VIN to enable it. (pololu.com)
The input voltage, VIN, must be at least 0.5 V for the regulator to turn on. (pololu.com)
However, once the regulator is on, the input voltage can drop as low as 0.3 V and the set output voltage will be maintained on VOUT. (pololu.com)

Electronic voltage regulators are found in devices such as computer power supplies where they stabilize the DC voltages used by the processor and other elements. (wikipedia.org)
In automobile alternators and central power station generator plants, voltage regulators control the output of the plant. (wikipedia.org)
In an electric power distribution system, voltage regulators may be installed at a substation or along distribution lines so that all customers receive steady voltage independent of how much power is drawn from the line. (wikipedia.org)
Zener diode regulators make use of the zener diode's fixed reverse voltage, which can be quite large. (wikipedia.org)
Feedback voltage regulators operate by comparing the actual output voltage to some fixed reference voltage. (wikipedia.org)
In electromechanical regulators, voltage regulation is easily accomplished by coiling the sensing wire to make an electromagnet. (wikipedia.org)
This framework is designed to provide a standard kernel interface to control voltage and current regulators. (kernel.org)
This applies to both voltage regulators (where voltage output is controllable) and current sinks (where current limit is controllable). (kernel.org)
Most regulators can enable and disable their output while some can control their output voltage and or current. (kernel.org)
Additionally, unlike most boost regulators, this unit offers a true shutdown option that turns off power to the load (with typical boost regulators, the input voltage will pass directly through to the output when they are disabled). (pololu.com)

Find similar words to voltage divider using the buttons below. (yourdictionary.com)
The Voltage Divider eliminates the need to connect a resistor to an analog input by putting a high precision potentiometer on the board to allow the adjustment of the 'fixed' resistor. (active-robots.com)

Voltage is defined so that negatively charged objects are pulled towards higher voltages, while positively charged objects are pulled towards lower voltages. (wikipedia.org)
The sodium channel protein has positively charged voltage-sensing regions, which move towards negative charges on the outer surface of the membrane when the latter becomes depolarized. (encyclopedia.com)

necessary to reduce supply voltage and increase current) one must increase capacitance. (wikipedia.org)
Match the capacitance (the farads) and use voltages that are higher (usually that is the case) than what is called for and you should be safe. (diyaudio.com)

The products in this category relate to miscellaneous cold chain accessories, including Energy Harvesting Control devices and voltage stabilizers. (who.int)
However, the first single-phase voltage stabilizers for mains powered appliances are expected to be prequalified and listed as E007 accessories in 2017. (who.int)

The problem [Mark] discovered was that the mains charger circuit did not have any mains isolation, being a simple capacitive voltage dropper feeding a rectifier . (hackaday.com)
Primarily used for experiments in physical science, physics, and chemistry, this versatile sensor measures voltages across various resistive, capacitive, and inductive components. (carolina.com)

A dual-voltage CPU uses a split-rail design so the processor core can use a lower voltage, while the external Input/Output ( I/O ) voltages remain at 3.3 volts for backwards compatibility. (wikipedia.org)
But those losses are lower if the electricity is transmitted at higher voltages, which is why the current UK National Grid operates at up to 400,000 volts. (thenakedscientists.com)
Now the Technology company ABB are working on developing even higher voltage systems that could operate at up to a million volts, which they think could transport power further and more efficiently. (thenakedscientists.com)
This is only when the lights are quite spread out and there would be less voltage drop running the primary (120 volt) power to two separate locations from each of which shorter not-so-fat secondary (12-24 or so volts) lines are needed to reach the lights. (doityourself.com)
Electric voltage of 380 volts or less is considered low voltage and above 380 volts, high voltage. (medscape.com)
High voltage is generated at the power plant and is transformed down to approximately 120 volts for most wall outlets in homes. (medscape.com)

Due to the logarithmic shape of diode V-I curves, the voltage across the diode changes only slightly due to changes in current drawn or changes in the input. (wikipedia.org)
When higher voltage output is needed, a zener diode or series of zener diodes may be employed. (wikipedia.org)

Medium voltage cables are already being used in a range of industrial applications, and they are fast becoming a key part of the effort to maintain and expand the capabilities of the global energy infrastructure. (ul.com)
Preserving the quality and reliability of medium voltage distribution cables is critical in helping to ensure the safe distribution of electrical power in industrial environments.There are various factors during cable production that can compromise cable quality. (ul.com)
This UL white paper discusses the factors related to the premature failure of medium voltage distribution cables, including those involving production practices and procedures. (ul.com)
The paper also outlines the steps that utilities and other industrial users of medium voltage distribution cables can take to monitor cable quality throughout the procurement process, thereby helping to reduce incidents of preventable cable failure. (ul.com)
The white paper concludes by reviewing UL's audit and inspection programs for medium voltage distribution cables. (ul.com)
This course provides information on the construction, operation, maintenance, and inspection of medium voltage switchgear and circuit breakers. (rockwellautomation.com)
We produce a wide range of low and medium voltage motors that are built to withstand virtually any industry and application, setting new standards in extreme duty performance and durability. (toshiba.com)

Is a voltage stabilizer required for my air conditioner? (samsung.com)
When the air conditioner power supply is not good, there are low voltage conditions, or the device is working without a stabilizer, the cooling power may feel weak. (samsung.com)
A voltage stabilizer may be required since it manages fluctuations in power and avoids irreparable harm. (samsung.com)
What is a voltage stabilizer? (samsung.com)
A stabilizer is a device that stabilizes utility voltage before supply to the air conditioner. (samsung.com)
Simply, a stabilizer prevents the appliance from 'being fried' by voltage spikes. (samsung.com)
A stabilizer detects and stabilizes external input voltages with a high or low output surge and transmits stable output voltages to the air conditioner. (samsung.com)
Samsung air conditioner is stabilizer-free, operates steadily and reliably without getting damaged due to excessive flow of electricity in case of voltage fluctuations. (samsung.com)
The voltage stabilizer can protect the air conditioner from voltage fluctuations. (samsung.com)

The certificate of exemption has been granted to help facilitate the introduction of high voltage electrical equipment using alternative gasses and the phasing out of sulphur hexafluoride, a highly potent and strictly controlled greenhouse gas. (hse.gov.uk)
The exemption also brings PSSR into line with PE(S)R which also excludes all enclosures for high voltage electrical equipment regardless of the gas used. (hse.gov.uk)
Owners and operators of existing high voltage electrical equipment containing sulphur hexafluoride should ensure its integrity and safe operation by continuing to ensure that equipment is maintained and regularly inspected and tested in accordance with manufacturer's instructions. (hse.gov.uk)
HSE expects that any new high voltage electrical equipment utilising alternative gasses will be designed, manufactured and tested to appropriate standards before being placed on the market. (hse.gov.uk)
What are some sources of ozone?Lightning, high voltage electrical equipment, and air- and water-purifying devices are some sources of ozone. (cdc.gov)

Therefore, the conventional current in a wire or resistor always flows from higher voltage to lower voltage. (wikipedia.org)
A device consisting of a resistor or series of resistors connected across a source of voltage and having one or more fixed or adjustable intermediate contacts: from any two terminals a desired reduced voltage may be obtained. (yourdictionary.com)

When precise voltage control and efficiency are not important, this design may be fine. (wikipedia.org)
For each model quoted, all the technical parameters such as rated voltage, Power factor, efficiency, full load ampere, speed and other similar parameters should be provided in the technical proposal. (who.int)
All the electrical parameters like input and output voltage ranges, IP class and efficiency should be clearly mentioned in the technical proposal. (who.int)

Any difference is amplified and used to control the regulation element in such a way as to reduce the voltage error. (wikipedia.org)
It will reduce the voltage when the voltage coming into your home reaches the amount defined by the appliance manufacturer, keeping it within the acceptable range. (samsung.com)

HSE has published an exemption certificate for any pressure system forming an enclosure for high voltage equipment. (hse.gov.uk)

166 The voltage between points can be caused by the build-up of electric charge (e.g., a capacitor), and from an electromotive force (e.g., electromagnetic induction in generator, inductors, and transformers). (wikipedia.org)
If that is true then you should be able to install a switch or possibly even a dimmer switch from the power source controlling the primary power source to both individual transformers and low voltage lighting systems. (doityourself.com)
I will be purchasing two low voltage transformers for some landscape lighting, and will likely buy the VOLT brand transformers. (doityourself.com)
The problem mentioned has to do with some transformers delivering a higher output voltage than marked when the load is much smaller than the maximum load. (doityourself.com)
AllanJ, the VOLT transformers I am considering are all multi-tap, so I will be able to adjust voltage as needed, thanks! (doityourself.com)

if the output voltage is too high, the regulation element will normally be commanded to produce a lower voltage. (wikipedia.org)
You mignt inquire about whether the transformer has multiple output terminals allowing a range of output voltages close to including slightly less than the rated voltage. (doityourself.com)
How Does Matrix-UPS Report Output Voltage? (apc.com)
The Status menu of the APC Matrix-UPS reports the output voltage level of the Matrix-UPS according to the configuration of the Out V Report setting. (apc.com)
in this mode the Matrix-UPS reports its output with respect to its input voltage selection (set manually inside the UPS by the user at start-up). (apc.com)
If it is desirable to monitor the voltage at a specific output receptacle, the choices are 208 and 240 VAC. (apc.com)
Don't we have that voltage drop, we are trying to eliminate still at the output? (physicsforums.com)
But the output from the circuit you have shown will be 0.6V below the op-amp output -- in other words, it will be the same as the voltages at the op-amp inputs. (physicsforums.com)

The electrons are considered "cold" because they require much less voltage input and, thus, reduced power consumption to operate the transistor. (eurekalert.org)
The input voltage should not exceed 5.5 V. Please be wary of destructive LC spikes that might cause the input voltage to surpass 5.5 V (see below for more information). (pololu.com)
The + and - op-amp inputs will be at the same voltage, provided that the + input is positive. (physicsforums.com)
But why do input pins have to be at the same potential(voltage). (physicsforums.com)

A voltmeter can be used to measure the voltage between two points in a system. (wikipedia.org)
The robot can also measure the voltage and the current it uses. (lu.se)

The trend is towards lower core voltages, which conserve power. (wikipedia.org)
Because all the energy lost is actually with the current, the higher the voltage, the lower the losses. (thenakedscientists.com)
I'm running at 1ghz @ around 1.75, it seems to work at lower voltage settings. (overclockers.com)
I seem to be running @ 133 X 7.5(998) fine at a lower voltage, it is stable. (overclockers.com)
Electricity is transmitted by a high-voltage system because it allows the same amount of energy to be carried at lower current, which reduces electrical loss through leakage and heating. (medscape.com)

How to use a multimeter to measure voltage across resistors. (teachertube.com)

As described in a paper accepted at the 2020 IEEE International Electron Devices Meeting, which is taking place virtually next week, the transistor requires half the voltage of current semiconductors. (eurekalert.org)
Semiconductors are ubiquitous in device electronics, because their charge distributions can be conveniently manipulated with voltages to perform logic operations. (nature.com)

Because of that feedback, we have a simple voltage follower, correct? (physicsforums.com)

Submicrometer particle number concentrations and iron, manganese, and total particle mass concentrations all depended on voltage levels but not on wire feed speed at a constant voltage. (cdc.gov)

To conserve power and manage heat, many laptop and desktop processors have a power management feature that software (usually the operating system ) can use to adjust the clock speed and core voltage dynamically . (wikipedia.org)
Consumer Level: This is defined by consumer drivers dynamically setting voltage or current limit levels. (kernel.org)

Regulation 3(2) and Schedule 1 of PSSR currently excepts any pressure system containing sulphur hexafluoride gas and forming an integral part of high voltage electrical apparatus from all requirements of PSSR. (hse.gov.uk)

A VRT processor has a 3.3 V I/O and 2.9 V core voltage, to save power compared to a typical Pentium processor with both I/O and core voltage at 3.3V. All Pentium MMX and later processors adopted this so-called split rail power supply. (wikipedia.org)

voltage-gated ion channel Any ion channel that opens and closes in response to changes in electrical potential across the cell membrane in which the channel is situated. (encyclopedia.com)
you can either create it yourself as shown below, or use the programable voltage soucre in simscape electrical. (mathworks.com)
Is there a chance to use an electrical voltage source to model the source and the line and analyse it with a powerful-block? (mathworks.com)
It carefully controls the amount of generator voltage for charging your battery and operating electrical components. (kanter.com)
When there are small voltage differences in the wiring that connects different pieces of electrical equipment, an unintended current will flow through the system. (ieee.org)

Here we report procedures that carry out the controlled transfer of spin angular momentum between electrons-confined to two dimensions and subjected to a perpendicular magnetic field-and the nuclei of the host semiconductor, using gate voltages only. (nature.com)
In most materials, a number of electrons are free to move about at random until a driving force termed voltage propels them to move in one direction. (medscape.com)
A larger voltage exerts a greater force, which moves more electrons through the wire at a given rate of time. (medscape.com)

Fume characteristics were measured in a controlled apparatus as a function of voltage level and wire feed speed. (cdc.gov)

High voltage GDT devices are designed specifically for those customers and applications requiring a high level of isolation. (bourns.com)

Chris - We'll come back to David Hughes in just a second because first, we need to go to Dave Ansell's garage because we did a neat little experiment this week to explain why actually jacking the voltage up to very high levels can save you quite a lot of energy when it comes to transporting electricity. (thenakedscientists.com)
Its voltage is pushing electricity through some quite long wires to a light bulb which is modelling your washing machine or your lights in your house. (thenakedscientists.com)
Chris - So, the power stations, if they transmitted electricity at main's voltage, this would be happening. (thenakedscientists.com)

If the lights are rated for a range of voltages including what the transformer delivers at low load then no special treatment is needed. (doityourself.com)

If the voltage is cut off due to a power outage while using the air conditioner, the compressor will operate after approximately 3 minutes of a power outage. (samsung.com)
This ability to operate with less voltage and handle more current is key to meet the demand for new power-hungry nanoelectronic devices, including quantum computers. (eurekalert.org)

This presents the CMOS designer with a challenge, because in CMOS the voltages go only to ground and the supply voltage, the source, gate, and drain terminals of the FETs have only the supply voltage or zero voltage across them. (wikipedia.org)

91 Under this definition, any circuit where there are time-varying magnetic fields, such as AC circuits, will not have a well-defined voltage between nodes in the circuit, since the electric force is not a conservative force in those cases. (wikipedia.org)
When used with the Current Sensor (item #369631), students can study the dependence of current flowing on the applied voltage in various electric circuits. (carolina.com)
This sensor measures both low-voltage AC and DC circuits and easily connects into electric circuits with its 4-mm plugs. (carolina.com)

Withstanding higher clock speeds often requires higher core voltage at the cost of power consumption and heat dissipation. (wikipedia.org)

In addition to the panel mount sockets, there's also a AC-DC converter to step mains voltage down to 5 VDC for the ESP32. (hackaday.com)
If you'd like to limit your interaction with mains voltages, then we've seen some projects that commandeer the low-voltage side of a commercial smart power strip . (hackaday.com)

All [ citation needed ] CPUs before the Pentium MMX are single-voltage CPUs. (wikipedia.org)

As voltage increases, so does the current, strengthening the magnetic field produced by the coil and pulling the core towards the field. (wikipedia.org)

The CPU core voltage ( V CORE ) is the power supply voltage supplied to the CPU (which is a digital circuit ), GPU , or other device containing a processing core. (wikipedia.org)
177f, 197f Voltage difference is denoted symbolically by Δ V {\displaystyle \Delta V} , simplified V, especially in English-speaking countries, or by U internationally, for instance in the context of Ohm's or Kirchhoff's circuit laws. (wikipedia.org)
Under these assumptions, the electric field in the region exterior to each component is conservative, and voltages between nodes in the circuit are well-defined, where Δ V A B = − ∫ r A r B E ⋅ d ℓ {\displaystyle \Delta V_{AB}=-\int _{\mathbf {r} _{A}}^{\mathbf {r} _{B}}\mathbf {E} \cdot \mathrm {d} {\boldsymbol {\ell }}} as long as the path of integration does not pass through the inside of any component. (wikipedia.org)
The open circuit voltage (VOC) deficit in perovskite solar cells (PSCs) is greater in wide bandgap (>1.7 eV) cells than in ~1.5 eV perovskites.1,2 Quasi-Fermi level splitting (QFLS) measurements reveal VOC-limiting recombination at the electron transport layer (ETL) contact.3-5 This, we find, stems from inhomogeneous surface potential and poor perovskite-ETL energetic alignment. (bvsalud.org)

The 240 setting is also useful for customers whose Matrix-UPS powers exclusively 120 VAC loads, their voltage is one-half the 240 VAC report. (apc.com)

In this case, the voltage rise along some path P {\displaystyle {\mathcal {P}}} from r A {\displaystyle \mathbf {r} _{A}} to r B {\displaystyle \mathbf {r} _{B}} is given by: Δ V A B = − ∫ P E ⋅ d ℓ {\displaystyle \Delta V_{AB}=-\int _{\mathcal {P}}\mathbf {E} \cdot \mathrm {d} {\boldsymbol {\ell }}} However, in this case the "voltage" between two points depends on the path taken. (wikipedia.org)

In summary, you would choose a voltage level, calculate the current drawn from the load, and then calculate the voltage at the source. (physicsforums.com)
First of all refer all your values to one voltage level. (physicsforums.com)
If I choose the one voltage level to be 132k then what next? (physicsforums.com)

Is there a block in Simulink or Simscaope to model a frequency controlled voltage source, with e.g. 100 V on each frequency from nominal frequency up to 100 kHz? (mathworks.com)
just tried your solution however, I need to combine the voltage source with a frequency dependent distributed power line block and it is probably not the same domain. (mathworks.com)

Dual-voltage CPUs were introduced for performance gain when increasing clock speeds and finer semiconductor fabrication processes caused excess heat generation and power supply concerns, especially regarding laptop computers . (wikipedia.org)
It refers to splitting the core voltage supply from the I/O voltage. (wikipedia.org)
Check the power supply frequently and ensure the device is not in a low voltage environment. (samsung.com)
Static: consumer does not change its supply voltage or current limit. (kernel.org)
Its supply voltage is set by the hardware, bootloader, firmware or kernel board initialisation code. (kernel.org)
Dynamic: consumer needs to change its supply voltage or current limit to meet operation demands. (kernel.org)
This should allow consumers complete control over their supply voltage and current limit. (kernel.org)
Cabo Verde operates on a 220 supply voltage and 50Hz. (who.int)

Too much voltage, and you drastically shorten the life of your generator and battery. (kanter.com)

419-422 In this general case, some authors use the word "voltage" to refer to the line integral of the electric field, rather than to differences in electric potential. (wikipedia.org)

Case studies on a modified IEEE 33 bus system with three area partition demonstrate the performance of the proposed distributed voltage control method. (easychair.org)

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