1401 Switched Capacitors - An Odd Thing And Super Useful For Inverters!
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- เผยแพร่เมื่อ 15 ม.ค. 2022
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Great video as always. just a suggestion for next time - The voltage readings on that meter are not visible in the video, usually. Is there a possibility to add a zoomed-in view somehow? Cheers!
I agree, I think a picture in picture if possible would be awesome.
Thats been an issue for hundreds of the videos, we've came to accept this lol
@marthale7 your far from the first to suggest this
@marthale7 i agree 100%. The amount ive learned from rob holds a great deal of value
@marthale7 truly dump people use large words to try to influence a superiority over others, while truly intelligent people will stop and admit how much they don't know and even if teaching other, will ask for thier opinion
Great explaining as usual, love the visual and hands on presentations you make. 🙂
Though it is always hard to get a readout of that display on your multimeter.
Would it be possible to put a Fresnel lens in front of it or have a old phone with a camera zoomed in to the display facing the screen against the camera making it a little easier to read?
Holy smackerel, thank you Rob. You teach me something new every time, as my ideas further evolve out of control....
Your capacity to jog people's brain cells is truly amazing. Knocking "known ideas" outside the box. This is how things change
I know you are showing this as a step in a process ...... but you could make it even simpler!
If you use a relay with a normally closed terminal and a normally open one you can connect the Cap to the common terminal and your input and output to the other two terminals. One throw of the relay can then cause the relay to oscillate!
This might not be possible with your future plans unless the frequency of the relay oscillation and your desired (50hz?) output are the same!
I love how you break things down so anyone can understand them and build a series of videos to enable them to build and adapt things! Nicely done mate!
You could also use this as a voltage doubler or tripler by having it charge the capacitors in parallel and then switch to series for discharging to load
Absolutely great! There is much about the abilities of capacitors that is overlooked. This fractal switched capacitor principal is going to beright up there with the micro chip on evolutionary jump
THIS sounds EXCITING !!! 👌 👍🏽
MM display lost in the glare. But sounds good.
sry Rob can't see the MM display!
Sounds good, but does the voltage go up or down? I can't read the output your reading on your machine. Way tooooo far away camera
Charge pumps, i started using the 78S40 many years ago, and it took a while for me to truely understand how they work. Great topic, and love your ideas !
📻 1401 on your dial. Must be time to 🥳🥂 celebrate.
Thank you for all that you do ❣️ 🤠
Awsome video I am super excited for this project thanks Robert❤
Your content is superb... And you kinda remind me of that super famous actor Anthony Hopkins. 😜
lol - wow cheers mate
Super interesting one! I remember one of my teachers mentioning that capacitors and coils can act as the other one under the right circumstances, but this is a really interesting variation as the switch is somewhat replacing a coil and resistor!
yup, well a transformer is just a coil, with a core. and a secondary coil.
Well as good as it is Rob, you may as well go to the next level and do a video on highest effeciency switching like from a zvs driver! That should definitely get some excitement happening as not many people know or understand them and they 2 can come with a center tap !
Yes a second camera showing your power supply and meter would be nice but
The concept of this circuit is awesome and has great potential usage.
Pretty neat 👏
Thanks,...would love to be able to clearly see the multimeter output on your videoS
That's fun. I figured it's a 1000 uF capacitor. Are you sure it's a 1000F ? What you are describing is used in a lot of applications. There are ic's for voltage doubling or providing a negative rail called a charge pump. There are circuits for charge transfer which is more or less wat you describe. Atmel ( now microchip ) has capacitive touch button solutions which are based on charge transfer. I used that on many occasions and you might want to check it out. It's perfectly understandable and it'll make a good video.
It's not and never will be simular to a resistor. A resistor will convert dissipated electric energy into heat. A capacitor will never do that no matter what your circuit looks like. Depending on the load and source your circuit might have resistive components in it. Imagine you have an output capacitor in parallel to the voltmeter to flatten the voltage a bit. High currents will flow between the switched capacitor and the output capacitor. Heat and sparks will form at the relay contacts forming the disipative and thus resistive part. It's the same for an input capacitor and you can be sure there's one in your power supply. If you would use semiconductors to replace the relay it would be the same. No sparks but switching takes a while along a resistive trajectory causing a power peak in the semiconductor.
In theory switched capacitors can be used to make an inverter. However using an inductor is way more space efficient. For a 1000W solar panel you would need a lot of capacitors and very large values. For that reason high power inverters using capacitors do not exist. If you need a tiny power voltage doubler charge pumps are fine. If you need more power a step up converter with an inductor will be used in virtually any case.
Yeah it's only 1000μF so about off by a 1000 :)
@@zaprodk Probably a factor 1000000. That doesn't matter much. Same principles apply. For converters in general it is convienient to have smaller capacitors. If low enough electrolytic caps can be replaced by ceramic ones. Lasting way longer, cheaper, better properties and surface mount. The downside is higher frequency. Higher loses in the switches and EMC properties way worse.
Thanks for the video Rob. I see that the kapton tape was still attached and helped in previous videos to see the display but I was having trouble reading it lately. Are you using more lighting in the shop this time of year and getting extra glare?
hey you could use a arduino to power the relay at the changeable rates needed to provide that sine wave that would make a tiny sized inverter although i dont know how much power (amps at 240v) it could provide
So, would you use a 555 timer or other IC to control the switching, or use an Arduino or Raspberry PI?
Either way sounds good to me as long as I'm not sitting there for hours on end pushing that blasted button. 😉
Great video and interesting developments ahead. I and many will take your word on the meter readings but for clarity please could you set another camera up on the meter only, even a phone would do just so you can add the meter in a popup screen. Cheers, take care and stay safe, Mike
that tape did work for a bit - but from this video it seems to be not so good right now - I'll try a close up with a phone camera
nothing relating to this particular video, but using your knowledge and ingenuity, do you have any thoughts or ideas to help with the recent energy prices hike?
Do you think a power factor corrector could be used to make the power used look less on your meter?
excactly how a switch mode buck converter works or use two caps and some diodes to make a voltage doubler both rely on switching the input voltage on and off
If you really want something unbelievable try a step up transformer just using the basic counter and clockwise layers you don't need metal. But you have to layer one coil at a time. when pulsed . the other receives a voltage step up by adding core material amps are also increased. I believe Tesla thought it was to simple to create more from less. I wish i could have afforded to keep up with your page But, I've been out of work for a while. I have tested it 5 volt's in 40 volt's out . I inspired me so many yr's ago Thank you This is my way of returning the favor. equal length's of wire and same gauge. Thanks.
Sounds all very good but I suspect not using any capacitor Ive seen, not if you want to draw any meaningful current off it
Switched capacitor filters are an interesting subject.
Well placed diodes ups the voltage
Hello from across the pond!
Are these effects similar with air capacitors as well, Is it dependent on type? (Super capacitor, electrolytic, etc)
If so, it is worth a look back at tesla's wireless electrical vehicle, in sofar as an oscillating/vibrating air capacitor... depending on the frequency, it raises some interesting avenues of thought.
Happy experimenting!
Can the capacitors be printed on the circuit aswell?
Thank you Rob, very cool
Very interesting and I did recognise the switch symbol in the circuit diagram 😂
I wonder if switched capacitor would be the right term for my electroscope idea that has a grounded plate suspended next to the two thin leaves of metal so when it gets charged up and they spread apart, one touches the grounded plate causing them to collapse and start charging up all over again? (an idea I had a dream about during my making the Tesla one hour bill or note. which in the dream the units were on a table in wardencliff and tesla was using them to allow charging from the atmosphere then discharging them through a staged second electroscope that between the two electroscopes and the ground he had it going through a bifillar coil but from opposite ends of the coil to cause a pulse induced into a transformer secondary coil to make AC power from static electricity.)
Thank you, sir.
Hello Mr. Murray, very interesting to explore how to convert the energy that was made by all the wind turbine idea's. Making a converter yourself , i would like to see that. Have a nice day .So Oldt
also there is a full write up on how to use an arduino to make a pwm pure sine wave output inverter LOL, (the same people have the code for a modified sine wave inverter that is split phase and a 3 phase AC inverter, something I would find useful for anyone wanting to transmit their power long distance as high voltage AC and step it down at the end destination!
Where might I find the right up?
You have made a crude buck converter, the higher the frequency of the switching the closer to the Input voltage the output voltage will be. Or you could keep the frequency stable and PWM the relay and get the same result.
in the same sense that a resistor in line converts one dc voltage to another - then you right. But it is missing it's inductive element to be a buck converter - it really is a switched capacitor resistor
@@ThinkingandTinkering I was using the Buck converter as an analogy, the circuit can only produce an output lower or equal to the input voltage. Yon change the output voltage by limiting the amount of energy passing through it, as you say as in the same way a resistor does. This method does not generate the heating part that the resistor would, in the same way we use a capacitor in AC mains to drop the voltage down by limiting the current with the capacitors impedance.
You could replace the output side relay contact with a shockley diode so only needing one switching element. Ok this lose you about 0.4V on the max ouput.
The other description of this circuit is a Switched capacitor “filter” which can be said to resemble a resistor, but never seen one used in a power circuit.
Still gives the old grey cells a work out.
@@TheEmbeddedHobbyist have a look on google scholar - for example Hybrid Multilevel Inverter Using Switched Capacitor Units, IEEE DOI 10.1109/TIE.2013.2290769 - cheers
I used to have some books from the 40s that told how make an inverter out of nothing but capacitors and a mechanical vibrator
May I ask what was the publication name?
@@chrisgargas4538 popular mechanics
are but.... can it run a small replication of Professor Eric Laithwaite jumping ac magnetic aluminium rings ,the more you add the higher they rise ^_~
-just use
Andreas 'Use your PC Soundcard as an Oscilloscope, a Signal Generator, and a Spectrum Analyzer (Arta, REW)' to do the frequency switching.-
Interesting video spoiled by not being able to see the voltmeter display which seemed to be the main point.
Very interesting mate
thank you mate - i watched your fractal wood burning vid earlier - i will give it a go i think - nice work
@@ThinkingandTinkering thanks mate Can't wait 👍 😀
Looks like its efficiency will be
👍
i like all of your video's i only ever had one minor problem , the audio is all over the place so it's pause go back turn up go but
Hey Who am I to complain. Still Like Your Vid's
So i guess this is the same principle of the marx generator?
You Inspired Me
Yeah. I've read capacitors are better at being inductors than inductors are. (Of course all components have capacitance, inductance, resistance, etc.)
I cant see the voltage out.
yeah - seems that little caption tape trick has stopped working - I'll try something else ike maybe soho close ups of the MM on my phone?
Got it
I once red a book about AC and DC. We could do better if we went completely to DC. Most appliances already work on DC, they convert AC to DC internally. I am running my laptop on LiFePO4 batteries and I step up the DC from 14 to 19 Volts for that matter. But my LED lighting will run fine on DC as well.
One note: working with DC caps on 240 Volts (or 230 or so) is very scary, I think you are not going to continue this experiment on TH-cam. It is far to dangerous. imho of course.
🙏👍🙏
this kinda looks like a hydraulic ram
Ummm we could not see the values....nor did you state what you saw.....redo please DVD:)
we cant see the top meter reading!
fuknbadass you n ur son are pretty cool
Don't understand😞
Charge the 1000V capacitor bt sticking it in a wall socket.....then throw it at Luke...." Hey Luke let's play hot potato"
Im the first commentor 😅
awesome lol