By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up. Unfortunately, a lot of information on eHow is of very low quality. The eHow article defines "t is the elapsed time since the power supply was turned on".

If you connect a source of electricity with a fixed voltage constant voltage supply to a capacitor through a resistor, the capacitor will charge, the current that flows will be initially large but will decrease over time. The formula describes that. A capacitor can act as a short-term store of energy that can be released in a short burst over a small amount of time if your load occasionally requires more power than your power supply can deliver.

Amperage in the most basic sense, is what controls the amount of work that can be done from a constant voltage.

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The circuit that would need to be added to the capacitor would be a resistor with ohm value of connected to a Darlington pair of transistors. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 6 years, 3 months ago. Active 1 year, 11 months ago. Viewed 47k times. As written, your question is vague and difficult to answer. You say you want to "increase the current", but what current are you talking about?

And what voltage? Can you please clarify your question, and possibly the title? Active Oldest Votes.

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The eHow article defines "t is the elapsed time since the power supply was turned on" If you connect a source of electricity with a fixed voltage constant voltage supply to a capacitor through a resistor, the capacitor will charge, the current that flows will be initially large but will decrease over time. Amperage can also be increased through the usage of magnets.

The lower that is, the higher your peak current will be. What options do i have?? And how is it done?? In this case, increase C. What the math behind that and how do i know the right amount of resistor that i'm connecting to the capacitor?? Why is it set to ohm? It isn't possible to magic energy out of nothing, a 12V 2A supply provides twice as much energy per second - a 12V 1A supply simply cannot provide that much energy per second.

The Overflow Blog. Featured on Meta. Feedback on Q2 Community Roadmap. Related Hot Network Questions.In this project, we will show how to build a DC-to-DC boost converter circuit that allows us to manually control the circuit with a pushbutton. So, for example, you may be able to convert a 5V DC voltage into 30V. A DC-to-DC converter works on the principle of an inductor primarily and a capacitor. When fed DC power, the inductor acts as a energy storage device for current.

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As long as DC power is supplied to it, it builds up current through the coils as well as a magnetic field around itself. When the DC power is turned off, the magnetic field collapses and all the current that the inductor charged up gets dumped across to the capacitor.

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As the DC power gets turned on and off in the circuit, which we will do through a pushbutton switch, the inductor stores up more current and dumps it across the capacitor each time. This is why the voltage across the capacitor increases each time we do this until it reaches its peak.

The amount of voltage that the output will increase to depends upon a number of factors including the value of the inductor, the maximum voltage storage of the capacitor, the switching speed, and the DC input voltage of the circuit. We won't go to in depth mathematically about each relationship but will show how this variables relate to the amount of voltage increase there will be.

In this circuit, we will use a manual pushbutton to switch the DC value on and off. In a more advanced, real-life circuit, you would use a transistor instead of a manual switch, as this gives more precision and control over the circuit.

Unlike manual control, a transistor can switch on and off much quicker, in the order of microseconds, and give much more precision. A microcontroller would control the transistor and it could be coded to turn the transistor on and off at set intervals. Under such control, the output voltage would be able to calculated precisely and the code could be written so that these bursts of DC voltage occurred at desired times. However, for this circuit, we are simply demonstrating how a DC-to-DC boost converter works and using a pushbutton will do the job just fine for this circuit.

Components Needed. So for this circuit, we will use basic discrete components. This includes a resistor, an inductor, an electrolytic capacitor, and a diode. In this circuit, we will use a mH inductor. Increasing the inductance allows for greater voltage output, because the greater the inductance, the more energy it can store.Capacitors are energy storage devices. Once charged, they store energy for eventual release.

Because capacitors are frequency dependent, they block direct current DC and pass alternating current AC. Capacitors have a direct relationship with current, where, if you increase the capacitance of a circuit, you increase the AC current. On the other hand, diodes are used to convert AC current into DC current.

When this happens, DC current increases. Connect a capacitor in series with a resistor in your circuit, similar to an RC circuit.

how to increase dc current with capacitors

For example, an RC circuit consists of a voltage supply, "Vs," connected in series with a resistor, "R," and a capacitor, "C," connected in series with the resistor.

Convert to microseconds to get RC in the same units as t. Increase the current level by increasing the value of the capacitor. For example, increase the value of the capacitor from 5 nanofarads to 5 microfarads:.

Decide where in the circuit you wish to convert AC current to DC current. Generally, you do it at the source of the current. Connect a diode in series with the current source.

You do this by connecting the back or the "anode" of the diode to the source. Dwight Chestnut has been a freelance business researcher and article writer for over 18 years. He has published several business articles online and written several business ebooks. Chestnut holds a bachelor's degree in electrical engineering from the University of Mississippi and a Master of Business Administration from University of Phoenix Share It.

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how to increase dc current with capacitors

Electronics Engineering. Wiki User Capacitors store charge. They do not by themselves increase voltage or current. If a capacitor is connected to a load, it can provide a large transient current in respond to sudden demand. It can only average out demand spikes, it cannot provide more current on average than is available from the supply.

In a circuit such as a power supply, a capacitor can store charge, and hence preserve an output voltage, during periods when the input voltage falls e.

It can also be used in a voltage-doubler or inverter circuit, possibly together with an inductor, to generate a high voltage from a low one. But it, by itself, does not increase voltage, it merely collects charge like a funnel collecting raindrops to provide a steady stream of water. Related Questions Asked in Electronics Engineering, Electrical Engineering What are the possible remedies against corona because of extra high voltage?

Asked in Electronics Engineering, Electrical Engineering What will increase the voltage in a circuit? There is a way to use capacitors to increase the voltage in an ac circuit. It was used to increase the voltage going to motors. It is seldom used now that it is much easier to run a higher voltage line into a place of business.

It does not work for Direct Current. Asked in New Electrical Work What is the principle of operation of a ballast?

Older ballasts with an iron core are basically an autotransformer. They transform voltage to a higher voltage with a single winding. Electronic transformers increase voltage with capacitors and diodes.Latest Projects Education. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Thread starter Soomro Start date Jan 27, Search Forums New Posts. Thread Starter Soomro Joined Nov 20, 8.

I am trying to increase amperes up to 2 Amps for charging batteries for a remote car. I tried making a boost converter using NE, I was able to increase voltage up to 70 volts however amps remained same or lower in most cases without load. I want to keep this handy without purchasing another panel; is there anything else that I can do to increase amps of my circuit. I will store this energy in mAH battery if battery level goes lower than specific level.

Scroll to continue with content. You can't get power from nowhere, and the panel can only provide so much. The higher the current the lower the volts. A DC-DC converter may enable you to trade current for volts.

how to increase dc current with capacitors

What voltage is the battery? MrChips Joined Oct 2, 20, The power generated is fixed for a given solar output if we ignore MPPT for the moment. If you want to increase current you will decrease voltage. Your solution is to get a bigger solar panel. Guys, thanks for speedy answers.

Increasing AMPERAGE of a DC Circuit

I can add more panels however I am doing this research to have grip over my electronic understandings; I got a 4. And adding more panels would make it odd, where would I fix a big panel in a toy car? I was thinking if some form of circuits exist where I can get voltage from panel and store it in big capacitors and then release it slow and steady with higher amperage.

MrChipshow can I decrease voltage and increase amperage, do I have to use voltage divider for that or use regulator? And how much can I get through it. Let's just assume and go to basics that a voltage is pressure of water and current is actual water following through a channel. Correct me if I am wrong? If I am correct then we can store this water current somewhere and then utilize it for some other purpose.

I need to do something like that, I don't know if it is possible or not but can there be something like having 10v at mA, storing it for few seconds and releasing it with 5v at 2amps?

You can do some simple calculations to answer your questions.Capacitor also known as condenser is a two metal plates device separated by an insulating medium such as foil, laminated paper, air etc. It stores the energy in the form of electrostatic filed and released to the circuit when needed in case of AC. Keep in mind that capacitor acts as an open circuit in DC i.

DC is a constant value i. Now lets connect the capacitor in DC and then AC and see what happens? Keep in mind that a capacitor act as a short circuit at initial stage and a fully charged capacitor behave as an open circuit. Capacitors resist a changes in voltage while inductors resist a change in current and acts as a short circuit in DC.

At initial stage when we connect a capacitor to the DC supply, there will a small current of flow will occur until the plates becomes saturated. In other words, the positive terminal of DC supply source will suck the electrons from one terminal and push the electrons to the second terminal until the first plate becomes positively charge and the second one as negatively charged as shown in fig.

At this stage, the applied voltage equal to the voltage across capacitor and capacitor plates are saturated and there is no more flow of current. At this stage, capacitor behaves like an open circuit and if we increase the value of applied DC voltage, the capacitor may damage and explode. We know that there is no frequency i. It means, theoretically, a capacitor will provide infinite resistant to the flow of current according to its rating.

how to increase dc current with capacitors

Hence no current flow will occur as current in capacitive circuits are:. If we put X C as infinity, the value of current would be zero. That is the exact reason why a capacitor block DC. When we connect a capacitor across an AC supply source, it starts charge and discharge continuously due to continuous change in the supply voltage.

This is due to changes in AC voltage i. In fig 2 asame happens like in DC connected capacitor at the initial stage i.

Is it possible to increase a DC voltage with capacitors and switching circuitry?

The first plat becomes positive and the other one is negative due to plenty of electrons. This process is known as charging of a capacitor i. Charging of a capacitor is given by:. Now, the polarity of applied voltage is reversed i. Now the negative source terminal attracted to the holes and pushes back the electrons to the holes in the opposite direction.

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The process remains continuous and current flows due to the continuous flow of electrons. This process is known as discharging of a capacitor i.

The discharging of a capacitor is given by:. We know that there are different capacitors with different marking rating on its nameplates i. If a capacitor blocks DC, why the rating is mentioned in DC? The value of DC printed on capacitor nameplates are the maximum value of DC voltage which can be safely connected to it.Capacitors store energy for later use.

The voltage and current of a capacitor are related. The voltage across a capacitor changes in a smooth fashion and its derivatives are also smoothly changing functionsso there are no instantaneous jumps in voltages. The mass of the car causes a smooth transition when going from 55 miles per hour to 60 miles per hour.

In a similar and analogous way, you can think of the capacitance C as the mass in the circuit world that causes a smooth transition when changing voltages from one value to another. To express the voltage across the capacitor in terms of the current, you integrate the preceding equation as follows:.

You can see the i-v characteristic in the graphs shown here. The left diagram defines a linear relationship between the charge q stored in the capacitor and the voltage v across the capacitor. John M. Santiago Jr. During that time, he held a variety of leadership positions in technical program management, acquisition development, and operation research support.

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Relate the Current and Voltage of a Capacitor. About the Book Author John M.