Questions tagged [energy]
Energy is defined as the amount of work that can be performed by a force, measured in joules (J). Energy is power integrated over time; power (W) is energy per second (J/s). This is a poor tag to use. Please consider if your question relates to energy as defined in physics; don't use it as a synonym for power or capacity.
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RS485 registers for calculating total power consumption (kwh)
I have an energy meter (OHIO A2000) which has been now discontinued by the manufacturer. Anyway, I'm following the manual for extracting energy parameters through Modbus RS485 communication. I'm ...
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Are common IR LEDs harmful to the eyes?
Is it safe to look at the IR LED clusters on security cameras that are commonly available? They seem to be quite capable of lighting up a distance of 6m. What is their energy density? I'm not sure if ...
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Drawing energy from a 3.7V LiPo battery while simultaneously charging with a solar panel
I have a 200mAh 3.7V (0.7W) LiPo battery that I am looking to use as an energy source for a large model airship.
I also have a 7.2V 100mA (0.72W) solar panel that I would like to use as a means of ...
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Whats the meaning of Im, Is and Ih
I would like to know what's the meaning for the abbreviations of Im, Is and Ih in leakage currents measurements, as it is depicted in these graphis. Could anyone help me?.
The link of the source is: ...
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How can I store a energy from a low output?
I need a simple answer to a simple question: How can I store energy as in a battery to use it as energy for an LED lamp or something else? The available power is 50mV- 60mV and 70mA - 80mA.
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Potential energy of a uniformly charged parallel plate capacitor filled with dielectric
For a uniformly charged parallel plate capacitor (dimensions l × w × d), its potential energy is given by:
$$ U = \frac{Q^2}{2C}\ $$
Now if we insert a material (dimension x × w × d) of dielectric ...
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Electric potential - 2 power supplies
I'm studying among other things electrical engineering and I'm kind of in a discussion with a colleague about an 'experiment': he claims that when i measure the voltage between the + output of power ...
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What does "highest ionizing energy deposition" mean?
I am looking for how to compute the thickness of shielding materials and have found the following research:
ISNPS Technical Report ISNPS-1-2013 Tai and El-Genk.doc (unm.edu)
The report is mentions the ...
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Ballpark energy consumption per state transition for a D-flipflop in a modern chip manufacturing process?
For a D-flip-flop in a modern yet-not-too-extravagant chip manufacturing process (let's say 28nm or 40nm), what are some ballpark figures for the energy cost per switching H->L or L->H one can ...
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Are PV panels convenient without incentives?
I finally finished a project in which I designed a 55 kW of PV system for a 50 kW load and I finally calculate costs and revenues over 20 years. I found that with a 25% of incentives for the cost of ...
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SSHI circuit on LTSpice
I've been trying to get an SSHI circuit running on LTspice for several days now (see below schematic). My problem is the following: the simulation (.tran) stops after a hundred milliseconds. Being a ...
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Impact of reduction on Dynamic energy and dynamic power in microprocessors
A microprocessor has been designed to have a dynamic switch which reduces power consumption when the loading reduces. Assuming a reduction of 20% in voltage reduces clock frequency by 20%. Calculate ...
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Piezo cantilever energy harvester: how to mesure such small power?
I am currently designing a piezo energy harvester and I would like to modify the resonating frequency to maximize the energy recovered(for exemple by changing the center of mass of the cantilever). My ...
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Getting most power from low voltage solar powers, each different angle
I have a specific problem. I have 10 small solar panels, each max 5.5V and 100mW power. Each one is at a different angle. I want to get the most power out of it. Cost is not really a problem, but I do ...
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My first full contact-less power meter doubts
I need to measure power consumption of an industrial machine, it is supplied with 3-phase plus neutral connections, 220V per phase. They said there is a voltage stabilizator device between the power ...
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