Does Energy Harvesting make any sense?! (Experiment)
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In this video I will be having a look at the subject of energy harvesting. I will explain where and when energy harvesting is being used and how we can create such energy harvesting systems by ourselves. Those system will partly work with sun light, mechanical vibrations, heat and radio frequencies. Let's get started!
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2011 Lookalike by Bartlebeats
Killing Time, Kevin MacLeod
(incompetech.com) - Věda a technologie
6:28 That's because the piezo was mounted to move with the machine, it isn't experiencing any forces besides those wires' inertia, which are probably the source of the voltage.
A better way would be to mount the piezo on a fixed object and attach a stick to the washing machine with the other end going to the piezo, so that the vibrations are making it flex. Please try this again, I think you can achieve way better results with the piezo method :D
(better ways in the reply section)
@@lorenzo5390 Hmm, big voltages :D
Jk but isn't that how those piezo strikers work?
I was about to say the same. You can get much better results if you attach it to a separate object
Mounting a weight on the other side of the piezo should also work because of inertia.
@@theonetribble5867 thats a neater solution:-)
Why not simply put the piezo under one stand of the machine, or better use 4 piezos for each stand?
Radio frequency energy harvesting can be seen in a crystal radio!
It would have to be tuned...but the audio output could then be fed thru the bridge rectifier..the problem is you have to have a pretty wide band antenna to pull in the RF energy
Brian C my point is just that RF energy harvesting can be practical
Brian C my point is just that RF energy harvesting can be practical
@@youssefaly97 practical ? possible yes, practical no.
practicality and possibility are different. It is possible for me to walk 30 km from home to work, but it's just not practical.
Malik maybe practical with PIN diodes, needs more testing.
The storage capacitor's leakage / equivalent parallel resistance also plays a large part in how well your energy harvesting system will perform. Even if the Rleakage is in the megaohm range this becomes significant at these power scales. If anyone wants to seriously play with energy harvesting make sure you dive into the datasheet for your capacitors and get low leakage caps.
Why aren't you making any videos? I'm starving for your content as well!😭
I learned a lot from you, sir. We miss your videos.
And it looks like the larger cap/battery you are using, more leakage happens.
OK
Did I just come to the smart side of CZcams?
Cuz these are some good ideas. I normally end on the weird side
*"THERE IS NO FREE ENERGY!!!!"*
Wait, wrong channel
F U L L
B R I D G E
R E C T I F I E R
@@nox_chan I like that guy . Hopefully he is still ok
there is though. there is just no perpetual energy.
@@nox_chan
E V E N
F U L L E R
B R I D G E
R E C T I F I E R
boocraftgaming
T H E
M O T H E R
O F
A L L
R E C T I F I E R
The radio frequency harvester doesn't work because many people forget the most crucial part, the spoon. Don't forget the spoon.
Never forget the spoon :-)
After checking the video, it indeed says _"never forget the spoon"._ I was about to edit the quote but I'd rather leave the mistake up and shame myself.
Of course Scott didn't know that because he doesn't have google glasses and lab coat
@@realdragon or solve rubik's cubes
Ah! Darn! I used a ForK!!!!!
I pay zero for my electricity.
BeCaUSe I HaRvEsT mY EnErGy frOm my nEiGhbOuRs
Gamer moment
I too pay zero for my electricity, but I usually have one or two digits in front of the zero ;-)
I live for free,
Because i harvest my neighborhood's souls.
i just plugged my home network to city network without using energy usage meter (JK)
Please add one more topic to your backlog: energy harvesting modules.
The thing is almost no energy sources may be used directly without any conditioning. There are specialized modules for piezo elements, for energy harvesting from tiny solar panels and so on. With such circuits your device can harvest even tiny short-living bursts of energy, effectively conserve them in a battery and provide later when needed to measure and send the data. Very rarely you can also see circuits without an energy buffer, the most notorious example of such approach is EnOcean kinetic harvesters built into wall light switches. Patented and probably the only of this kind.
Also there is a lot of relevant research papers on the topic. Such papers often list comparison tables for different energy sources: energy density (size to energy ratio), efficiency, typical energy output and so on. I would love to see such data in the video.
Sorry. I was working on the energy harvesting and energy saving methods for my master's thesis, that's why this video triggered me so much. Thank you for your videos!
I feel ya it triggered me a bit too and I don't even utilize energy harvesting for my work.
Though to be in the spirit of the video ultra capacitors would be better than batteries as the purpose was to eliminate the battery and its life expectancy problem.
Though im sure there are plenty of batteries that would work just fine for that sort of application. IDK you would know better i'm just a robotics guy.
this is a very interesting topic.
I am considering to make it a subject for a mini project
Really loving the "high production value" your videos are having. Everything is very well done. Even the introduction is made carefully. Loving the content!
4:57 you mean FULL BRIDGE RECTIFIER
FOOOOOOL BRIDGE RECTIFIER
*drammatic zoom in and zoom out intensifies*
ANYBODY SAID FULL BRIDGE RECTIFIER
FUUUULL BRIDGE RECTIFIER!!!
Mehedi Sadagdhar
4:57
Smiling DC. Make me unsee it
Speak English
Agreed
:D
Out of all the things in this video, you noticed that "smiling DC".
I don't know if that makes you well observant or someone with a short attention span. It made me chuckle a bit.
„Pareidolie“ 🤓
Calculators: Energy Harvesting done right
You'd think that, but some solar calculators actually have fake panels in. It's cheaper to fit a tiny button-type battery than to fit a solar cell. The battery will run flat, eventually - but a calculator chip draws in the micro-amps when sleeping, so that battery will last a few years. Long enough that the calculator is probably long lost, and if not the owner will just discard it as faulty.
@@vylbird8014,
The buttons will wear out before the battery dies.
6:25 maybe putting the piezo disc in a case with a steel ball to hit it would help
If he mounted the steel ball on a spring solderd to the piezo that's how motion sensors in car alarms work.
@@dogwalker666 ah a spring...yeah that would work too...the ball would move to the vibration and the spring would translate that vibration into the piezo plate, I was thinking maybe a fixed arm, but the spring would probably be better even though it might lose some of the movement due to damping
@@haydenc2742 you do get damping but you also get resonance too.
It would be really interesting to see how much power one could get from a roadway with a blanket of piezo disks across it.
If you're really interested in this a fun craft to do is to wire up some small piezo discs to an led inside the bottom of a shoe and watch it light up as you run. The amount of energy you get out of the piezo disc is really small though I think the results of a road version would be pretty disappointing :(
Steve Mould has a great video about the piezoelectric effect and why it happens based on the crystal structure/lattice of molecules that make up the thing being shocked/compressed and expanded. Think it makes sense that it wouldn't be a ton of energy when you watch that. Sure lots of energy from the impacts is lost to deformation/heating of the element and subsequent sound waves etc. so wouldn't think much of the actual energy goes into ends up in electrons flowing through the output wires.
Reminds me of "Solar Freaking Roadways" for some reason
You have a chance of increasing rolling resistance, and that would be undesired.
Besides, tires tends to eat into asphalt, so a no telling how long a piezo-surface would last.
@@erlendse yah basically same problem with solar roadways roads get replaces because they undergo a lot of wear over time, thunderfoot did a few "debunk" videos on why it's just a bad idea
Brother i was watching all of your videos. But few months ago I left watching. Now i m back and enjoying again..THANK YOU for your efforts and lot of knowledge
I'd love to see you cover an RF wake-up system for IoT.
Receiving RF transmissions can be rough on the power budget. If you use timing to know when to wake up and Rx, you need a RTC and wake-up interval short enough to prevent losing sync.
A wake-up system is a passive (or *extremely* low-power) circuit tuned for a signal at a particular frequency, which can serve to wake up the main microcontroller/receiver. This allows you the flexibility of broadcasting the wake-up signal whenever you want, followed by transmission of your regular data payload.
The connection is that passive wake-up circuits are essentially a special case of RF energy harvesting, which got limited coverage in this video.
rx'ing a wireless signal doesn't use much power. You only really need power to demod and interpret the signal which can realistically be done with a low-power mcu. It get's more difficult with protocols like wifi since they require a response to a request e.g. tx'ing some data and that's where you have your high energy consumption up in the 100mW's.
BLE solves this by reducing the data rate thus allowing for lower tx power and reducing the number of transmissions e.g. not requiring a response every 0.1 seconds and being ok with several seconds between transmissions.
@@web1bastler I mean, something like a nRF24L01+ draws 7-11 mA during Tx (depending on output power) and 12-13 mA during Rx. A CC2652R draws 7-10 mA during Tx, and ~7 mA during Rx. Other chips are broadly similar.
Rx can be deceptively bad though. Tx you can often wake up, scream into the void, and then go back to sleep. With Rx, you may need to *keep* powering the receiver until you either A) hear something or B) time out and give up.
That's where a RF wake-up system really helps.
My house gas water heater uses a thermal harvester on the pilot flame to blink a little red led.
my heat gun uses a similar system to indicate that it is still to hot to be put in its case
They often use this thermopile on the pilot to keep the gas valve open. If the pilot goes out, the generation stops, the valve closes, and you don't get a gas leak.
@@eDoc2020 I see you also watch technology connections ;)
@@beware_the_moose I do but that's a coincidence. I haven't seen a video where he talks about gas valves.
@@beware_the_moose Did you maybe confuse Technology Connections with Steve Mould? The latter one published a video about thermocouples just two weeks ago.
Mechanical vibrations: magnet on rod on the washing machine, coil stuck on the wall, profit
You Literary just showed my entire undergraduate dissertation In 10 minutes, I'm very impressed
Fun fact: Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress eg: piezo disk . The word Piezoelectric is derived from the Greek piezein, which means to squeeze or press, and piezo, which is Greek for “push”.
Is piezoelectric effect the reason some hard candy spark when struck with a hammer?
6:28 When we hit the piezoelectric disc both side of the disc experiences am impulse...
But in case of washing machine it does not experience any impulse as the other side of the disc is not hitting and surface to experience a normal Reaction force...
I suggest to place any another still object touch the exposed surface of the disc so that the disc can experience a normal Reaction force...
Or also we can also attach any other heavy object directly to the other side of the disc which will actually result in applying Normal reaction force die to increased Inertia.
Anyways loved your beautiful efforts for us to gain some brilliant knowledge while we are at home safe.😊
You have very good understanding in energy harvesting techniques
Ive been wanting to making all of these before but never thought it would be practical,
thanks, I enjoyed this little video. so full of good information
I like the idea of switching ON/OFF the TV thanks to a simple circuit. I guess it will be the subject of a video!
Great Job! Thanks.
The best part at very end showing world application, doing away with standby circuit, brilliant!
Thank you for all this kind of knowledge!
I have learned a lot from your videos!
Theses are some really interesting ideas for increasing efficiency even by a little
Great video! I've been reading about the advances of low energy harvesting via radio frequency through iot devices through university papers published online for a while and this video is a good compliment to those papers. Thanks from America!
@great scott Instead of bridge rectifier you can use single diode for rectification to lower the voltage drop.
This is an extremely useful video. Everything was very well explained!
Why did someone dislike, there is nothing to dislike, it's all facts
They dislike because it goes over their head
The dislikes are from toxic fortnite kids.
The dislikes are coming from battery manufacturers.
They are that free energy machine creators
Thay also might have not liked the video people are wierd in this world
i watch all your videos ! from Morocco i love your content
Greetings from czech republic, great videos keep up the good work!
Superb. Thanks for your great sharing!
You could try a single diode rectifier in order to reduce the other 3 diode voltage drops. Also, you could use the Joule thief I think you already covered in your videos to boost the voltage obtained from low signal harvesters.
I am a commerce student but I am also very much interested in electronics and you have taught me many things of electronics thanks for that ☺️
The piezzo was awesome. i had never thought of it.
I was hoping for an RF harvesting example, I saw that you can get battery-less bluetooth tags and was amazed that you can actually get some data back. I think there was even plans to develop sensors with power coming from RF power harvesting.
I want to see this man try out Minecraft Redstone
On the washers unit you would probably have to get to the bracket on the inside away from the spring so it's attached to the most vibrating part of the machine bracket so it will have more effect that be near the bottom of the washer where the spring connects to the agitators bass and I'll be where the machine shakes the most inside while it's on spin cycle and all the other Cycles
For vibration, maybe attach the piezo to a stationary fixture and attach some rubber cushion to the washing machine and let it hit the piezo when it vibrated.
A great topic! Well done! We need a new development project on that
Nicely done
Great video
Thanks!
For the piezo disk, you should try to generate bending in the plate by clamping the outer edge and adding a mass to the center part of the disk.
9:00 Did you see things for phones, that blinks when you receive a call? IIRC these things didn't use batteries. I had one in transparent case, no batteries
Sadly, these isn't longer produced
Yeah I remember those.
I guess they attenuate the signal? Not ideal.
Hope to see further projects on this!
For things like motors (including your washing machine) that rotate at a set frequency you could use a weight attached to two springs, setting it's natural resonance frequency to that of the washing machine. This would create a positive feedback moving the weight back and forward. If that weight was now a permanent magnet, and you surrounded the 'harvester' with a coil, you could generate an AC current. A bit more faff that a piezo disk, but would probably produce much more power. I guess such a harvesting device would be the exact opposite of mass-tuned damper.
I do t care what anyone says about your channel.....You are the best descriptive electronics channel on YT.
Nice video! For greater efficiency try to increase the oscillations of the piezoelectric. Attaching it somewhere is not enough, there must be good relative motion between the sides and the center for a greater deformation and thus energy output.
Great video! For the piezo disc on the washing machine, could you hang a ball bearing on a string of a suitable length that it would harmonize with the washer motion and strike the piezo disc with regularity?
I'm disappointed, I was looking forward to RF energy.
Same dude :(
@@leandroebner1405 same here
@@danielliaw6860 feel with you mate :D
For the radio frequency harvester, you can use the same circuit of cristal radio.
What you can also do is harvesting magnetic fields around cables that carry a high current. I have a screw driver with a built in led that lights up when it gets around 10cm next to cables when they carry energy. Would also be suitable for factories or homes
I know someone who is doing reaserch in RF harvesting at my university and the upper limits are something around -35 dBm so about .3 microWatt, this can definitely be used for some aplications like sensors.
Usually low powered systems like the ones show use a halve wave bridge rectifier consisting of a single diode that has a forwars voltage of less than .1V the system shown whas definately not optimised for this. Even if the full wave sounds cooler and get more energy usually in low power systems higher voltages are more preferable so halve wave rectifiers are used.
The IOT system requirements were way to high, you could have a protocol like BLE take 100 micro seconds to send a message so it would take less than 200 micro seconds while consuming 10 mA definately not one whole second.
About 40 years ago I was told of someone who lived about 800 yards from a long wave transmitter and using copper bars in his roof harvested the energy. The story goes that he was found out because people complained about the dead spot he created behind his house. How much of this is true I don't know, it came from someone I had no reason to disbelieve and we did have loose links to the Home Office department that would have investigated it.
@@twotone3070 First, if you consider RF harvesting as a means of getting free energy to save in the electricity bill, it's stupid because it would take millions of years, or more, to pay back the materials and equipment needed.
The ways I see to reduce RF in an area is by blocking the line of sight with a wall or a metal mesh or more feasible by generating noise and interfering the signal so the receiver can't recieve correctly the original signal. It could be also possible to reflect the signal so that you have multipath propagation and generate echos that would interfere but don't know if this would be possible.
For the vibration one, a good idea would maybe be something like a small weight haning above it, and as soon as the whole thing vibrates, the weight will hit the piezo crystal.
As a rf engineer it would be quite interesting to try the rf method again but with a little help to find the right frequency for your area. If I find the time to test it myself I will send you the the video of my results. Tv broadcast signals are pretty strong and annoying for us, so using these might work.
I think it would also be important to pair the harvesting circuit with a suitable antenna!
Surely a big antenna on your roof pointing toward the transmitter and designed for those frequencies would be worth a try
A better way for the piezo: mount to vibration source near edge, add small weight on point far away, so flexing occurs during vibration. Best to have a mechanical resonance effect to drive piezo with big amplitude.
For the piezo, you should fix a mass on the white part of the disk or place the disk between the machine and the ground (if it can support the weight)
You can easily calculate a spring damper system that maximizes its output amplitude when stimulated with the input frequency of the washing machine. If you attach that to the piezo, your power output should be a lot higher.
this day is gonna be great because GreatScott! uploaded
You're welcome :-)
Great video, now I have ideas lol thank you.
Could you perhaps do a full video on inductive power harvesting such as harvesting power from cables and magnetic field for devices that are used for monitoring and can be placed on cables for a simple power source?
For those considering the piezo method, in addition to the comments below about method of attachment, keep in mind that the charge and discharge rate of a capacitor is directly proportional to both the value of the capacitor and the resistance (effectively r x c in seconds). You could utilize this by having a fairly large resistor connecting the capacitor with the circuit you want to power and some sort of switching circuit that switches the capacitor between your charging and discharging circuits
Note: RC actually gives you Tau, which can be used to calculate charge and discharge rates, but the point still stands, the larger the resistance and/or capacitance, the longer it takes to charge and discharge
Picking RF with a long wire an a tank circuit tuned in a strong broadcast, rectifier bridge and an electrolytic, you can lit the LED
For the piezo, hang a hammer (or something else with some mass) on the side of the washing machine, with the face of the hammer contacting the piezo. Then you have some actual pressure on the disc when the washing machine vibrates.
Great video. I'd like to see it in action with say like a temperature/humidity sensor + uc.
Great knowledge
That tiny IC that's powerd by IR light is actually pretty genius. In theory nothing needs to be in standby for a remote to work.
GreatScott is my favorite asian gothic electronic youtuber :)
For RF frequency energy harvesting, the easiest is an crystal AM radio. When I was young, tuning into one of my local radio stations at AM600, there was enough DC energy to power a mechanical meter and even a real headphones. The normal super efficient crystal radio earpiece wasn't necessary for that particular radio station. At my last house, the mains 60Hz was easy to harvest, though, I had 250kv lines a block away from my house running in parallel. 1 good solid beam of metal plus a connection to an earthing GND was enough to illuminate LEDs.
A great application for energy harvesting would be to use it inside these super cheap 2$ solar garden LED lamps. They have a single small NiCd battery inside them, and a tiny solar cell.
I would live to cheaply hack one and put an ESP8266 inside it that gets powered as soon as an IC somehow detects that the battery is charged enough to sustain reading a sensor, connect to WiFi and transmit an MQTT message. But sadly, I haven't found a super cheap way to do that yet. Any help appreciated!
I think it would be awesome to be able to use these 2$ solar-powered waterproof enclosures as IoT sensor nodes - either using Wifi or LoRa.
Radio frequency energy is also used in RFID pin systems the transmitter outputs a high frequency band but a close range only. I also thought if a factory where to put this to use they could have a transmitting station within the building to power a the iot devices.
Ludic science has a video on rf energy harvesting. His setup is very simple and can (with some modification) power the IOT system discussed here.
About mechanical energy harvesting: i once saw an interesting but probably too expensive concept.
some sort of windmill generators in the middle of the highway, that would spin around because of traffic going both ways. Best for roads with a lot of cargo trucks
Add a small weight to the other side of your piezoelectric disk and tune your antenna and RF circuit to 2.4 GHz.
The disk will not experience much force no matter how hard you vibrate it without some inertia to act against. 2.4 GHz is not only the most likely noise to be found, but cheap commercial circuits and antennas that use it are very easy to find and it propagates quite far.
I use a peltier powered circulation fan on my wood stove. This application is great so i can force the hot air around the room. Other than that, i would stick with solar power to create the charge current necessary to run your IoT.
If you want a standalone attachable vibration harvesting device you need a mass to provide resistance to the vibration
You could have attached some kind of height to the piezo disc, so that its inertia would act as your screwdriver hits.
To harvest mechanical vibration energy, a cantilever beam with the same natural frequency as the frequency of your vibration source would be better. Also since piezoelectric transducers have a parallel equvalent capacitance, using a full bridge rectifier to harvest energy is not very efficient. Some more efficient harvesting techniques based on synchronized switching would be perferable. Such as SSHI(Synchronized Switch Harvesting on Inductor) and SECE(Synchronized Electric Charge Extraction). The circuit implementation is quite easy, too.
try dangling instead of stick the piezo disk to the surface of your washing machine, since hitting it generates more energy. leaving it it dangling will allow the piezo disk to move a lot more and hitting a surface harder. you might also try adding a weight to the piezo disc.
I think you could harvest move energy if the vibration are perpendicular to the piezo plane, so I think placing it on top of your washer could improve it.
There's a lot of research going on in RF harvesting and I saw some very good demonstrations, and there's also biological energy harvesting for bioelectronics and implantable devices.
For a follow up video add ambient barometric pressure. There are clocks that are powered by it.
Could you have a (between 10 and 1000) antenna in series, each tuned to a different frequency, to harvest enough of the radio spectrum to power a Teensy?
So cool thanks!!!!!
Great video keep it up
A simple experiment for the piezo: add a bit weight to the "free" side of your piezo. Inertia will add more push/pull forces and you'll get higher voltage out.
I find this topic interesting after watching this video.
Some examples of energy harvesting powered devices:
Shake powered flashlights.
Windup radios & flashlights.
Shoes that light when you walk.
Self winding watches.
Yo-yo w/lights.
Many toys w no batteries but still light when rolled, dropped, shook, etc.
Sorry, I don't know if it was already said, but I think that you might add a bit of improvement. First, I think it is better to use some sort of active rectifier made for example of transistors, because you wouldn't loose those 0.7v from the diode. Of course that is more complex and needs additional power to turn on and off the transistors, but maybe it is worth it. Another thing is that that with piezo disk, you need to bend it, not to shake it to get some energy from it. So in your example with the washing machine, I think you should stick it to the wall and connect some rod to the washing machine to put some vibration stress on the disk for example.
I think the problem was that the disc and machine have the same reference frame, you could place steel balls (from bearings) in a chamber with the machine in one side and the disc in the other, the shaking would probably induce a lot of collisions with the disc and charge the capacitor quickly
Hi, do you think it would be possible for outdoor use to create a power supply using a solar panel and a supercapacitor so that the ESP is able to send data using WIFI (such as temperature and humidity) constantly 24/7?
The low voltage sources like TECs and single solar cells are tricky to work with, but there are some ICs that are designed for it. I wonder if a1W blue LED and a lens could be turned into an effective concentrator solar setup. Should have an easier to use Vo than Si cell, but the output current might be too low.
I really love your channel and I hope you are around for a while yet. Keep it up and thanks.
The free energy comes from old telephone lines too. Enough to light up 6-11 5mm led, depends how bright you need.
the RF one could work at tiny power levels, but you would need to match the circuit to the antenna, and a local Radio station. not a lot of power, but that's how crystal radios work, so it does work at tiny levels.
In this topic you should do some research on the enocean protocol (battryless domotic)
Many years ago I read article about USA students making IOT system for seismic sensors powered by induction forces from power cables.
3:52 I screamed out loud "FULL BRIDGE RECTIFIER"
You talked about a factory or the home, so one thought would be a current transformer, even the ground connection might leak enough through capacitance even with no actual fault current, tharere are clip on types so you don't have to disconnect any wires.
The other thing i've seen around is harvesting from the ground, i can see how that would work due to voltage gradients (or step voltage) through the ground.