Does Energy Harvesting make any sense?! (Experiment)

Useful links to websites partly shown in the video:

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!

Thanks to JLCPCB for sponsoring this video

Music:
2011 Lookalike by Bartlebeats
Killing Time, Kevin MacLeod

[SirDella]

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)

[youssefaly]

Radio frequency energy harvesting can be seen in a crystal radio!

[Afrotechmods]

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.

[boocraftgaming]

*"THERE IS NO FREE ENERGY!!!!"*




Wait, wrong channel

[Asu]

The radio frequency harvester doesn't work because many people forget the most crucial part, the spoon. Don't forget the spoon.

[serhii]

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!

[tilaksai]

I pay zero for my electricity.





BeCaUSe I HaRvEsT mY EnErGy frOm my nEiGhbOuRs

[soranuareane]

Really loving the "high production value" your videos are having. Everything is very well done. Even the introduction is made carefully. Loving the content!

[rhinobikestech]

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

[DivyanshMMMUT]

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.😊

[CraverYT]

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.

[TDZTV]

You Literary just showed my entire undergraduate dissertation In 10 minutes, I'm very impressed

[PablumMcDump]

It would be really interesting to see how much power one could get from a roadway with a blanket of piezo disks across it.

[maryborn]

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!

[vigneshr]

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”.

[derdavidspielt]

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.

[peterthesage]

6:25 maybe putting the piezo disc in a case with a steel ball to hit it would help

[lucasmontec]

Mechanical vibrations: magnet on rod on the washing machine, coil stuck on the wall, profit

[DaveMcAnulty]

My house gas water heater uses a thermal harvester on the pilot flame to blink a little red led.

[pavan]

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 ☺️