Questions tagged [energy-harvesting]
Energy harvesting devices generate power from an external source. While they may include solar, kinetic and other energy sources that are also used on a large scale the term is normally reserved for small low-power applications. An example is a wristwatch that uses kinetic energy while the wearer is walking to power the watch.
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Energy Harvesting - General Requirements [closed]
Generally speaking - what ideal parameters would you want for an energy harvesting device specifically for the following :
Max Power output?
Output Voltage variation?
Size of energy reservour?
Is ...
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Electromagnetic Energy Harvester
It was suggested I make a new post since the topic was growing in complexity.
I am looking into constructing an inductor to utilize electromagnetic induction near a high voltage transmission line. If ...
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Low power circuit design for powering an e-paper display
This is a follow up to my last question on Low power circuit design for turning an LDO on/off at specific voltage levels, where I wanted to find a low power way to turn an LDO on/off at specific ...
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Low power circuit design for turning an LDO on/off at specific voltage levels
I am designing a low power circuit that uses the TPS61023DRLR for energy harvesting, charging a 1.5F ...
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Energy harvesting using LTC3108 not working
I’m trying to boost the energy of a plant microbial fuel cell (PMFC) using the CJMCU 3108 LTC3108 energy harvester breakout board. I’ve configured it like the image below, for 3.7 V.
LTC3108 datasheet....
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LTC-3588: how to do vibration energy harvesting?
I am trying to collect energy by using an LTC3588 and some piezo elements.
The voltage meter shows from -200mV to 200mV depending on how much / how strong I touch the piezo. I have set the LTC to 3.6V ...
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Battery charging by vibration energy harvesting (LTC-3588) - how to wire?
I would like to harvest energy to keep a LFP battery charged (for a BLE device which has VERY little consumption). The battery already lasts several months, but since the device will be closed/sealed ...
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PCC100 Harvest Design [closed]
I want to do harvest design with PCC100 IC but I couldn't find much documentation so I wonder that what is the RF input voltage relation and IC output voltage between. Do you have any idea?
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How can overproduction of electric power be a problem to the grid? [closed]
Recently, in Brazil, we had a major shutdown of the electrical grid of the entire country (wich is mostly interconnected across the majority of the states). After official investigation, the culprit ...
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How to calculate the size of the goldcap in energy harvesting?
I want to build an NFC-transponder (NFC chip: ST25DV) which is powered over energy harvesting. How could I calculate the size of the goldcap (supercapacitor) or maybe a normal tantalum capacitor to ...
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Boost converter for solar-charged supercaps to power an ESP32
I want to build an autonomous outdoor temperature sensor that samples the temperature once per hour and stores the results over WiFi. I would use an ESP32 that will consume about 12 μA in stand-by (...
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Using super capacitor with Li-ion battery to power an automated guided vehicle
I have an automated guided vehicle which is powering by a 11.1V, 25C, 6000mAh Li-ion battery. The reason I am attempting to make a hybrid power source to power the automated guided vehicle is to ...
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Where to find huge solenoid inductors (~25 H) or cheap magnet wire? [closed]
I am on an energy harvesting project, and it would require a 25 H solenoid inductor (width 0.3 mm max).
The only issue is that I am completly unable to find any inductors of that size on the internet. ...
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In-line switch for energy harvester
I have a seemingly simple problem.
I am developing a system that harvests energy from a piezo-electric vibration source. The harvesting circuit works well and I am happy with that, but I also want to ...
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Thermo-electric generator (TEG) harvesting using LTC3108
I'm doing a project regarding thermal energy harvesting using TEG and an LTC3108 boost converter.
I have constructed the circuit according to the datasheet of the LTC3108. I used a 1:100 surface-mount ...
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How to slowly store higher voltage from low power source?
I want to use a small solar panel (about 1V 15mA in ambient light) and then boost its voltage to 6V to slowly charge a 6V battery or capacitor. I have experimented with some generic boost converters, ...
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What would happen if a superconducting power line were hit by lightning?
I recently read an article on EETimes, discussing superconducting power lines to increase transmission efficiency by 5-10% due to nearly zero ohmic resistance.
They state that normal power lines
...
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Which topology should I use for energy harvesting
I am making a energy harvester design but am confused which of the following circuit should I use to amplify and filter my harvested voltage. The first topology is the synchronous switch harvesting on ...
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Zener diode not regulating capacitor voltage
I am trying to harvest energy from a stepper motor by turning its shaft with my hand.
Since it is a 2 phase motor, I rectified both phases and connected them in parallel to get more current, then a ...
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Impedance calculation of a four stage Dickson voltage multiplier
I built a four stage Dickson voltage multiplier for RF energy harvesting at 2.45 GHz. This is the circuit which I built.
My components are BAT54S as diode and 100uF capacitor. I need to calculate the ...
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Piezoelectric Harvester Circuitry
Can anyone tell me what type of circuit is used in this piezoelectric harvester? And if possible, could you also provide a diagram of it when connected to battery?
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Sorting very different voltages and use them to charge batteries
I'm working on a project to produce electricity from a source that can produce sometimes negative, sometimes positive voltages, ranging from mV to kV depending on the situation, with very little ...
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Convert kWh during a 1 hour period to average 15 min kW output
If I have a photovoltaic system that outputs 100 kWh from 1PM - 2PM on a given day and I am trying to figure out what the average 15 minute kW would be during that time period, would that be equal to ...
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Show polarity of magnetic pulse using two LEDs
I have made this simple circuit:
In response to a rapidly changing magnetic field (pulse), the LED blinks.
An example of the pulse is shown below:
Now I would like to have a circuit with 2 LEDs so ...
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Ideal diode for 0-5V range for measurement circuit
I am building a measurement circuit that measures the voltage/current from a thermogenerator. The expected measurement range (and therefore input voltage range) is 0-5V. I plan to measure it with a ...
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Efficiency of a solar cell
I am from Colombia where recently was opened a solar park with a power of 61 MW link to news
I consulted the Solar radiation in the area and has a value of 5 kWh/m², the solar cell efficiency is 20%, ...
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Can you charge a LI-PO battery using negative voltage?
I have to charge a LI-PO Battery (11.1V 1800MAh LB-12 19.98Wh 5C) using an P2110B (RF Harvester). The battery charger (YT-0003S) supplies 12.6V @ 1.1A.
The P2110B supplies only up to 5.5V at 50mA. Now,...
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Harvest AC current by connecting to ground?
The other day I was curious and I tried the following:
Set multimeter to AC
Hold one lead in one hand
Plug the other lead into ground plug of a house socket
Multimeter shows ~2V
Does that mean that ...
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How to use a battery charger evaluation module as a booster?
I have a power source that can give me around 0.9 ~ 1 V and 900uA. I would like to use the BQ25570 battery charger evaluation module to give an output of 1.8 V. I would like to attach a capacitor to ...
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How to calculate energy added to grid using active and reactive power?
I have recently installed solar system that adds energy to the grid. My utility company has installed bi-directional meter at my place to record energy consumed as well as energy added to the grid.
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Measuring AC power output from harvester
In order to characterise an energy harvester, I want to measure its power output. It is a rotary harvester (basically like a regular generator) with three phases.
I do not have fancy measuring ...
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A piezoelectric battery
This question is of a purely theorethical nature.
Applying pressure to a piezoelectric material creates voltage, and the inverse is also true. I have seen this likened to a spring, and was wondering ...
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Impedance Matching using Transmission line
Hi! I was looking at this research paper for Energy Harvesting through Rectanna and I stuck with this thing. The author, first, calculated the Rzin of the rectifier circuit. He had a source resistance ...
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Is it possible to generate RF to then harvest instead of just using background RF?
I know you can harvest background RF using energy harvesting techniques but this only generates a small amount of power. Could you put a RF emitter close to an energy harvesting product to get more ...
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Can electronic devices be installed on the pillar of UHV towers such as 345kV?
Can electronic devices be installed on the pillar of UHV towers such as 345 kV? Because I have an idea to install a remote automatic control electronic device on the tower to control the rotation and ...
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What is this symbol called? A blue rectangle with a red dot
This is a rectifier circuit in RF Energy Harvesting. I have no idea what does the blue rectangle symbol called. (Found in https://pdfs.semanticscholar.org/d6fe/47f5539a231dfeeef67166977893070788f2.pdf)...
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Current transformer energy harvesting from a mid-voltage line
I'm planning on harvesting energy from a 33kV line which has an average 10rms A current. The main conductor (N1) has a overall diameter of about 13mm.In the beginning I tried to harvest around 3-4 W ...
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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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Can we harvest energy from a Rogowski coil?
Can we harvest enough energy (4-5 watts of power) from a custom made Rogowski coil?
The primary conductor is 33kV and has an average current of 10A. I'm aware of the induced voltage and the mutual ...
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Can I charge a 16V 16.6F supercapacitor with an 18V solar panel?
I'm working on my calculus project (I recently started college) and my topic is using solar panels and supercapacitors to help mitigate the lack of energy/electricity in the rural areas in my region. ...
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Enhancement and MPP of a basic Al-air battery with saline electrolyte
I created a simple Al-air battery in oceans using Aluminum and graphite electrodes with ocean water as the electrolyte. There is no electrical separation between the electrodes due to design ...
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How does a relay or switch work with batteries or capacitors?
I am charging my capacitor so it can act as a battery for a short period of time. I already did the calculations for the battery discharging and charging.
My problem is now that I have a load, I want ...
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Energy Harvesting application capacitor selection
I have an energy harvesting application and I want to use a capacitor to store energy. Due to the application being very low power, a capacitor of around 50uF might be enough. What is really important ...
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Very low voltage BJT behaivor
I'm interested in very low supply voltage boosting. 20-200mV, the lower the better. Usually such applications use zero threshold MOSFETs, but I'm curious if BJT will do the work too.
In the datasheet,...
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Capacitor's energy required for a predetermined drop in its voltage - with LDO and constant current elements as load
I am trying to understand how much energy a circuit (composed by some passives here called analog, and an MCU) will require. The system is powered through a capacitor, and the "passives" are actually ...
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Unpredicted behavior in an energy harvester circuit using max666
I conducted the simulation of a circuit used for energy harvesting. Its functioning is explained in detail in How the voltage stable mechanism work in Bridge rectifier?. But it was observed in the ...
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Simulation issue when using LT3012B
For an energy havesting application I needed a power management circuit so that it can power a wireless sensor module. The sensor module requires roughly 25mA current in active mode and 100uA in sleep ...
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What should I do to control the impedance in piezoelectric energy harvester
I am trying to design an piezoelectric energy harvester circuit and using voltage multiplier rectifier to build it now.
I am using a piezo film, LDT4-028k as a source and it has 11nF cap inside the ...
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Low voltage MPPT boost converter IC, constant input voltage
Following scenario: I have a bunch of Sunpower C50 unprocessed single solar cells. I'm trying to make a panel out of them for hiking. According to the datasheet each cell has 0.574 Vmpp an 5.65 Impp ...
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Schottky diodes in series to reduce maximum voltage at supercapacitor solar charging circuit
I use the following circuit to store solar energy harvested by photodiodes into a supercapacitor. The cap is rated at maximum 2.8V. The zener diode is rated at 3V, but depending on the harvested solar ...
