Energy is defined as the amount of work that can be performed by force, measured in Joules. Energy is Power over Time. This is a poor tag to use. Please consider if your question relates to Energy as defined in physics, not as a synonym for Power or capacity.

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3
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3answers
74 views

repeatedly turning an incandescent light bulb on and off every 20 seconds will cause damage to the bulb?

I have seen similar questions to this one but none of them were asked in the range of seconds only minutes. I just finished building a incubator for chicken eggs and I am using an incandescent light ...
0
votes
0answers
36 views

Solor Panel and Super Capcitor

I need some help trying to figure out the sizing needed for a solar panel and super capacitor. The overall design is a solar panel hooked up to an energy harvesting chip that charges a supercap. The ...
0
votes
2answers
72 views

Replace some LEDs with Diodes [on hold]

I have a COTS solar battery charger that has a number of different LEDs identifying the battery level, if its charging, etc. Its going to live in the shed, so 99% of the time no one will see its ...
0
votes
1answer
47 views

How do I work out energy stored in a capacitor bank?

I would like to know how to work out energy stored in a capacitor bank ? I have done my own working outs and have reached an answer of 0.192J, I don't know if this is correct ?
0
votes
0answers
45 views

Finding the effective switched capacitance in Intel processors

I need to able to calculate the power consumption of an Intel processor using the equation, P = C * (V^2)*f where C, V and f are the effective switched ...
-3
votes
0answers
25 views

How do I calculate electrical field power in Gas plate?

Between two flat metal electrodes are found glass plate and two oil layers. What is value of eletrical field energy Eglass in gas plate, when between metal elektrodes is voltage U=4,6 kV?
0
votes
1answer
49 views

Measure current of multiple loads with one sensor?

I have been doing some research for my project which requires to measure power consumption of 8 different loads. For that I plan to measure current in each line and multiply that with the voltage of ...
-1
votes
0answers
42 views

Does teslas construct of free energy acutally works? [duplicate]

I just wanted to ask a quick question. More than 100 years ago Tesla had a plan to provide everybody with free energy. Just for a fun fact my professor told it to me and he said, that this construct ...
0
votes
2answers
53 views

Battery support capacity for inverter supply of 30A over 3hrs

I need to determine the 12VDC Ah capacity of a battery pack, to provide current to a 30A 120VAC circuit thru an inverter with 88% efficiency, where the voltage must not drop below 10vdc, over a period ...
0
votes
2answers
71 views

Power Consumption on 220VAC vs 120VAC

I have an appliance that consumes 5mA when in standby on 220VAC mains. I'm assuming on a 120VAC 60Hz system it would also consume 5mA in standby (can't measure it). Since I haven't measured it, I ...
20
votes
6answers
2k views

Is a microwave's output power proportional to the mass of its contents?

My friend and I are having a heated debate. On the one hand, he thinks that a microwave oven that is empty, consumes almost no power (not considering lights, lcd, etc). He says that once you put an ...
0
votes
2answers
86 views

How do I calculate the energy (kWh) consumed by my 5V smartphone charger?

I'm having a little trouble in figuring out how much power is absorbed by my 5v smartphone charger. I'm curious as to how to account the energy loss due to stepdown.
1
vote
2answers
92 views

Checking CS5463 Power Measurement IC

I am using CS5463 for energy metering application. Is there any way to check if IC is working properly without communicating with the IC through SPI interface? I just want to make sure that the ...
0
votes
0answers
52 views

Energy harvesting to charge a battery

I am currently working on an energy harvesting project where I harvest from different sources such as solar, piezo, motors, peltier,... Now I would like to store the generated energy in any kind of ...
-1
votes
2answers
151 views

What's the most economical way to digitally measure 240V mains voltage, current and power factor?

I'm looking to capture and analyse measurements of the mains energy that I use per circuit. I've found a few consumer products that offer powerpoint energy monitoring such as the Kill-A-Watt, but PC ...
16
votes
4answers
2k views

Why is home voltage value higher during the night?

I have been monitoring the voltage in my own home ( Mexico 120v 60Hz ) I have been graphing the values every minute and im starting to notice that during the morning voltage gets up to 127 and during ...
0
votes
1answer
64 views

Measuring Li-Ion Battery voltage during charging/discharging

I am supposed to measure a Li-Ion Battery cell's energy efficiency. For this purpose i have built up the apparatus setup which charges and discharges the battery cell to calculate its energy. One ...
0
votes
1answer
39 views

Energy efficiency of Li-Ion Battery

My question is that does the energy efficiency for Li-Ion battery varies for different C rates ? For e.g if a battery is charged and discharged at a lower C rate, would it's energy efficiency would be ...
2
votes
3answers
59 views

High capacitance electrical capacitors

Are high capacitance electrical capacitors capable of storing energy instead of using a battery. If so would they be able to hold 7 kws of usable energy for domestic home use?
0
votes
2answers
53 views

Calculate power consumption that varies every second

We know that power consumption or Energy is E = Power x Time for utility billing, we used E = kWatt x Hour But I am not ...
0
votes
1answer
67 views

How is Frequency related to Kinetic Energy?

Does producing higher frequency waves require more energy than their low frequency counterparts with same amplitudes? For example, in electronics, would a 500 kHz wave require higher voltage to ...
1
vote
1answer
62 views

using a multiplexer for a high dynamic range current sensing

I am working on a project in which I am supposed to do current measurements for a sensor node. the range of the current varies from 0-30 mA the sensor node has two modes: 1. active mode (maximum ...
0
votes
1answer
40 views

Energy consumption of a small TFT

I am looking to replace a 4.3 inch TFT (480*270 px - 400-500 mA @ 5V) by a more energy efficient one (other sizes welcome) to go with my raspberry pi driven handheld emulation console. What is the ...
1
vote
1answer
98 views

How can enabled WiFi save battery? [closed]

My Lumia 535 claims, that leaving my WiFi connection turned on can save the battery. How can that be true? I'm a layman, if not ignorant to this area of expertise, but from what I was always told ...
0
votes
1answer
29 views

Does ZigBee Smart Energy Profile 2.0 support meter data pushing from meters to a concentrator

I've had a look around but can't find a clear answer. Can ZigBee Smart Energy Profile 2.0 devices send unsolicited messages to a data concentrator without a poll from the concentrator? Like ...
0
votes
1answer
63 views

CS5453 Energy Meter IC

Recently I have come across Energy Meter IC "CS5463". I read the datasheet and it says that the internal registers of the IC stores the Power information as a percentage. My understanding is that I ...
5
votes
3answers
136 views

Highest energy density electrolytic capacitors

I'm building a project that involves discharging a fairly large capacitor through a pair of electromagnetic coils. It's electrically very similar to a coilgun, though for a different application. I ...
0
votes
1answer
93 views

What is the efficiency of electric power converted to heat?

I'm trying to understand how much heat is generated when a given amount of electric power is drawn. And from what I understand, it's pretty much 1 to 1 isn't it? Example: If I have a 1 HP motor ...
0
votes
1answer
35 views

Convert power readings to energy readings

I have some electric power readings collected from a smart meter. With each reading there is energy consumed as shown in figure at link. Some readings do not have energy values. So, I need to ...
2
votes
1answer
77 views

How to measure energy distribution

I want to evaluate the energy flow in a battery powered system. So when the system runs a specific task the energy distribution between the different loads can be obtained ( similar to a Sankey ...
0
votes
0answers
104 views

Texas Instruments MSP430F6736, e-meter Energy Library problems with measures

I already posted my question on Texas Instruments' forum e2e.com but I didn't solve my problem. Maybe someone here will have an idea of what's going wrong. I'm using a MSP430F6736 and I have a big ...
0
votes
0answers
39 views

How to verify the Energy and Capacity delivered by the Lithium Ion battery?

How to verify the Energy and Capacity delivered by the Lithium Ion battery? I have a Lithium ion batter with below configuration: Nominal Voltage 4.2 V Nominal capacity 2250 mAh I am calculating ...
0
votes
2answers
208 views

Using a microcontroller+BLE (Bluetooth Low Energy) +Servo with one battery source

I am currently working on a project where I was looking for a microcontroller that is capable of BLE (Bluetooth Low Energy) which determines a servo's position. Using an Arduino the project works well ...
0
votes
2answers
139 views

How could a rechargeable battery charge itself without an external source?

While I was working on my graduation project I had to charge a rechargeable battery then discharge it and so on.I was shocked when the battery charged itself without any other external sources for ...
1
vote
3answers
87 views

Capacitor vs battery which cost less per capacity? [closed]

I know that batteries have better density ie capacity per volume. But I want to get the most energy capacity for the money. Which one would would you get? I'm trying to store energy from solar for 1 ...
3
votes
1answer
103 views

Why are batteries measured in electrical charge unit (ampere-hour) and not in energy unit? [duplicate]

I've searched for an answer for this question for a long time. Specifically I've found this thread which is closely related to my own question: Why are batteries measured in ampere-hours but ...
0
votes
1answer
32 views

Energy in transients vs. steady state

In something like a regular household, how much energy consumed is transient power vs steady state and what kind of frequency distribution does it have, roughly? I imagine the vast bulk of the energy ...
-3
votes
1answer
64 views

How can cities save electricity? [closed]

So I read about exercise equipment that produces electricity but very little, is anyone working to improve on it? I feel like this has a lot of potential to fight obesity and save on electricity no ...
1
vote
4answers
172 views

Is it possible to measure energy consumption from power socket? [closed]

I wanted to know if it is possible to measure how much energy is being consumed in the entire house by plugging in a power meter in any power outlet in the house? I am aware of some portable meters ...
-1
votes
3answers
138 views

Can we use use an oscillator as a low power source?

Is it possible to make an oscillator (or buy an oscillator IC) that can give directly (without using a power amp) up to 2W (or even 1W) of power? And if not, then what stops oscillators from getting ...
0
votes
2answers
53 views

Energy absorbed by the condenser

If the current \$i=0\$ the total energy absorbed is: \$E_{tot}=E_C+E_L\$, where \$E_C\$ is the energy absorbed by the condenser and \$E_L\$ that absorbed by the inductor. Now: \$E_C=\frac{1}{2}C ...
2
votes
1answer
79 views

Taking into account power factor when calculating energy savings

I am attempting to calculate the energy savings of a fan motor after a new runner and inlet cone was installed which claimed to improve fan efficiency. I have logged amp draw before and after the ...
2
votes
2answers
809 views

How do residential analog and smart meters meassure power?

Im building my own digital meter in order to upload the data to a sql database, up to now i know that there are several parameters being meassured into a digital wattmeter: volts, current, apparent ...
0
votes
1answer
131 views

Does electric potential influence the direction of current?

Main goal My main goal right now is trying to understand what negative voltage means, since I know AC can have a negative voltage and so can any electric component. I've pretty much read and seen ...
0
votes
1answer
2k views

2600mAh Battery Charging Time

I've spent a very long time trying to work this out, but some websites seem to conflict the information - or I'm completely missing the point. I have a rechargeable battery: 2600mAh 4.2V max charge ...
1
vote
5answers
683 views

Why and How does Power Plant generate Watts?

I know my question is stupid, it is stupid because I am not understanding it correctly. I thought two of following is required to calculate watts. Voltage, Current or Resistance/(Impedance in AC) is ...
3
votes
1answer
999 views

Will repeatedly turning a light bulb on and off damage it?

I have been hearing a common saying that if one keeps switching the lights on and off you will probably damage the light bulb itself, since every time you close the switch there would be a sudden rush ...
0
votes
4answers
308 views

how much energy is required to create a sound with constant frequency and amplitude?

Ok, this is a theoretical question, (Forgive my poor English, I am not a native speaker). Lets assume that I have a power-source with p unknown. this power-source provides energy to a speaker to ...
2
votes
1answer
577 views

Energy stored in a battery, formula?

Consider schematic below. simulate this circuit – Schematic created using CircuitLab With a DC source we can use this arrangement to find the force between the plates of the capacitor. ...
1
vote
3answers
551 views

Are Neo generators a Scam or not?

After reading the FAQ page of Neo generators, I became incredulous of this particular part (translated from Spanish): HOW DOES IT WORK INTERNALLY? Our optimized system collects the abundant ...