2263 - 10 Things To Do With A Microwave Oven Transformer
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- čas přidán 4. 04. 2024
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this is basically a reposting as the other version got lost somehow - Věda a technologie
That last bit about the little transformers 'exciting' each other.. is that where free energy comes from? 🤣
Remember when you were a young boy and your dad said "don't do it " when you went to put a 9 volt battery on your tongue. I do 😂😂😂😂😂😂
Electric fencing on farms, don't touch it and boys don't pee on it.... Then the dare game starts
@d.marbus1493 I'm a farmer son, been there and done it 🤣🤣🤣🤣😝
Wait a minute, your dad told you not to mine told me it tasted like chocolate got me real good with that one
@@d.marbus1493 i full sprinted into one of those
@@d.marbus1493 it was dark
For the battery charger idea, if the intention is to charge car batteries (or any other 6-cell, 12 volt lead-acid battery), winding enough turns to get 12 volts DC out isn't quite enough, because when fully charged, a lead-acid battery should give between 2.2 and 2.4 volts per cell - if it's a brand new battery, it is likely to be at the upper end of that range, if it has been used for a few years and gone through a few thousand charge-discharge cycles, it is likely to be at the lower end of that range.
The alternator in a car is calibrated to produce a constant voltage output of 14.4 volts for the battery charging circuit: When the engine is running and the alternator is operating, the entire electrical system in the car gets that same 14.4 volts too, which is why the headlights are noticeably brighter when the engine is running than when operating from the battery only.
When determining how many turns to wind on the transformer secondary to make a battery charger, you should have the bridge rectifier handy so you can temporarily connect it and measure the DC voltage output from it, rather than measuring the AC voltage output directly from the secondary winding. For two reasons: The diodes in the bridge rectifier have a small but significant resistance, which will cause a voltage drop of about 0.7 volts, so the DC output voltage will always be slightly lower. However, even if the bridge rectifier had no resistance at all, the DC output voltage would still not be the same as the AC voltage coming from the secondary winding of the transformer, just as a consequence of how AC voltage is measured. For example, if you take the 240 volts AC directly from the mains and wire it up to a bridge rectifier (which is what happens in any switched-mode power supply), you do not get 240 volts DC, you actually get more like 340 volts DC.
On the subject of doing the "fractal wood burning", I would not ever use the high voltage output of a microwave transformer for this, even though I do know what I am doing: You're certainly right that it is extremely dangerous, but it is also completely un-necessarily dangerous. For example, if you have a 1 kilowatt microwave (that's 1 kW of microwave radiation output), the electricity consumption will be more like 1.25 kW, since the efficiency of the magnetron is about 80%. Some power is used for the cooling fan, light bulb, turntable motor and control electronics, but that is not much - probably less than 50 watts. Anyway, the transformer in that microwave is using most of the power - say for sake of argument it is using 1.2 kW, and the secondary is producing 2000 volts: This will be at 0.6 amps, which is 20 times more than the minimum current required to have potentially fatal results if you got a shock from it. If the transformer was making 2500 volts, the current would be a bit lower, at 0.48 amps, but this is not significantly less dangerous.
Why is this un-necessarily dangerous? Because you don't need anywhere near that much current to do fractal wood burning, or to make a jacobs ladder. Either of these will work just fine with as little as 50 milli-amps. So you could do it with an old linear neon sign power supply transformer, or with an old CRT monitor/TV flyback transformer, driven at 20 kHz by an electronic oscillator circuit. These are fairly easy to build, if you can get some mosfets with high current handling capability and a switching rate consistent with the 20 kHz frequency.
Great comment on the safety aspect of mot's for wood burning. 50ma is still enough to kill however if you are able to move the frequency high enough then the nerves no longer respond to the high voltage in the same way as 50/60hz and can become relatively safe. Unfortunately iron transformers don't work well for high frequency but ferrite transformers do. Neon transformers do have a far better track record for safety so limiting the current to 50ma is still a good thing.
we're still thinking of you during this difficult time robert. i hope you can get back to work soon. god bless.
I was hoping for a Tesla coil mention but the Jacobs Ladder is really neat too.
First rule when working with electricity. “One flash and you ash”.
I've built a microwave transformer arc welder about 20 years ago. It does work but very badly without having the cold start function most real arc welders have. Highly don't recommend unless it's apocalypse rules.
those birds are goin fukkin craaaaazy
Thank you very much, dear sir. I'm interested in following your valuable and rich content, especially regarding renewable energy and energy storage methods, GO ON
I have always made my Jacob's ladders from old CRT TVs and monitors. Im not sure if thay are any safer than the microwave transformer but the microwave transformer does look fun.
Using the flyback transformer as the source of the high voltage, I would imagine: I made mine the same way, though I got the flyback transformer from Ebay, since CRT TVs or monitors are far more difficult to find now than they were maybe 10 or 15 years ago. I used a classic ZVS driver circuit (pair of mosfets configured as an astable multivibrator) to drive the primary coil of the flyback transformer, with the ZVS circuit powered by a battery of 4 x 18650 lithium-ion cells in series. If you include a couple of zener diodes, it can run from anywhere between 12 and 24 volts DC - I used a battery because it needs a fairly high current to drive it, which is beyond the capabilities of my bench power supply.
This type of transformer often contains a built in high voltage diode stack, so unless you can remove or bypass this somehow, the high voltage output will be DC rather than AC. This doesn't matter if you're using the high voltage for a standard jacobs ladder, since they can work from either AC or DC. But I also included a minor modification which I learned about from a "bigclivedotcom" video - he has an excellent video about jacobs ladders and how to make one, where he describes using an old neon sign transformer as the high voltage source.
These are much safer than using microwave transformers, since they are current-limited to a maximum of 50 milli-amps. But it has to be the old type, which is essentially a big and heavy mains-frequency transformer. The modern electronic neon-sign transformers do not work for making a jacobs ladder, or at least not for long, which I found out the hard way: You might get one or two arcs out of them before they burn out - and since all the electronics inside are potted with a mixture of hard silicone rubber and what seems to be quartz gravel, repairing them is just about impossible.
Anyway, the modification is what big clive calls the "gabriel electrode", which is a simple but effective addition to the standard jacobs ladder setup: A third piece of wire is placed about halfway between the two main electrodes at the point of shortest distance between them, which will be the striking point - where the arc initially starts before rising upwards. This extra electrode is connected to one of the others, through at least 2 mega-ohms of resistance. If the high voltage source is AC, it doesn't matter which main electrode the gabriel electrode is connected to, but if using a high voltage DC source, it seems to work better when connected to the positive electrode.
The gabriel electrode generates just enough ionisation of the air (the high resistance prevents it actually striking an arc) to allow the arc between the two main electrodes to strike reliably. This also allows the gap between the main electrodes at the striking point to be larger than would otherwise be possible without the gabriel electrode modification.
This essentially accomplishes the same effect as having a small flame in the middle of the gap: If you make a jacobs ladder, with the gap at the striking point about twice as large as the high voltage alone could jump, you can position a small candle just below the striking point, so that the tip of the candle flame would be in the middle of that gap. Without the flame (or a gabriel electrode), the high voltage would never strike an arc. But a flame will ionise the air within it and just above it, and this ionization lowers the resistance of the air in the gap just enough for the arc to strike.
Best bit was the arc welding. Could be very useful in a MacGyver situation.
I've made 3 of these "transformer machines" to use in "fractal burning" wood projects. It's tons of fun to build and use. Just be careful, death is possible. But isnt it always?.
Agreed, however, not all microwaves have transformers. The last one I stripped (still working but bought another to replace). I thought I would get a transformer but wasted my money. lol 😂
To charge a car battery(13.5 volts) the charger needs to be able to go a bit higher. There are also some losses. I made one of these transformers as you described but higher than 12 volt ac. I think I had it at about 14 V ac no load. I also added a coil for charging 6 volt batteries....just in case lol
Be sure to use thick coated transformer wire so your charger can handle even big batteries in bad condition or with little charge. Recycled microwave transformer will have lots of space for thick wire with fewer turns. Mine should handle about 40 amp but I will fuse it for 30 amp charging max.
I haven't finished this charger, as I haven't sourced and purchased the parts yet. I want to be able to control the charging manually, for different charging applications/situations/conditions, and be able to monitor both the voltage and current. I don't want a "smart charger", I want to be the smart charger. With good charge control you can restore batteries with a gradually increasing trickle charge, you can safely charge different types of batteries(some do not like being charged fast), you can do a quick charge and know by the gauges you are still safe(not harming the battery or charger). You can use the charger to just put in a trickle to keep a battery warm in very cold weather. Just so much one can do with variable charge control.
Most people would probably want a smart charger ;-)
fracking injuries are a bit gruesome.
10vac should rectify out to something around 14vdc for the 12v battery charger. With lots of ripples without a smoothing capacitor.
You/I know what is going to happen to some kid or idiot that does this.
Do the right thing and add a warning to the end of your comment.
@John.Flower.Productions
And what would that be?
They are going to wind it to get 12vac out, rectify it and charge the 12v battery to 17vdc instead of 14.7vdc, and possibly damage a battery?
@@Vibe77Guy You are right.
The worst thing that could possibly happen to a twelve-year-old who decides to remove and/or play with the transformer from a microwave, is that they might damage a battery.
There is no danger of anything happening to anyone; even the capacitor inside the microwave is incapable of causing any harm to someone who knows nothing other than what they have seen a criminally negligent dickhead do online.
That looks like the stereo transformer I just took apart
Mr. Robert Murray-Smith, I noticed your old website where you used to sell books and what not isn't there anymore.
Is there any way to purchase copies of your works?
I'm just curious.
What the f***, CZcams!
"Higher picture quality (144p)"???
Really???????
I seem to have harvested about a dozen magnetrons...
Got any ideas for those?
Plastic pyrolsys machine
@preciousplasticph
I like that. I think a couple of carbon rods inside the container may be easier.
They produce 2.45 Ghz, which is close to WiFi. I wonder if they could be used to power a 12.5 cm antenna and produce a wifi free zone.
Thank you, Robert. 2000v will make you fry chicken. But better than 132000v transmission...😂😂😂
Thanks!
Awesome stuff! ❤
Hey Rob, Terrance Howard is making waves on the internet atm. The flower of life is facinating and I get the idea behind it but do you have any thoughts to share? The closing words on the thunderstorm generator were very fair btw. I was being drawn in there for a bit. All of those generators are running on tick over so it would be intersting to see the gas analyser readings while they're under load.
11th Thing You Can Do With All of These Projects? 🤔
Produce lots of Ozone. 🤓
Quick question….If one was to feed the high voltage side will it output 240 volts? Thank you.
wish I knew this a long time ago. We tossed out those big, over the stove type microwaves all the time from rental properties.
Excellent CZcams as always!
I just took a transformer re-wound the secondary with 10 gauge wire. Until i got about 18v , thr old battery charger i replaced runs about 17.8v oc. And says 10 amps, i never seen more than 3.*** Amps. Im thinking i will do a center tap output to allow a low current charge and a high current. Tap the windings where it has about 13-14v then anout 17-18v put a two-way switch pre rectifier. To get a trickle charge, and a fast charge. I took an old charger with broken amp meter, added a digital volt and amp meter, would a diode drop be adviseable? To prevent the need to tap the transformer? It was difficult enough getting all that wire in that thing the first time I thought about just adding a large capacitor and dc to dc Buck converter! Use a big buck comcerter on it that claims like 10 amps. With cc cv, then it can charge lithium batteries also. The amp/volt meter was a nice upgrade. It's how i learned its misding 75-76% of it's power with a buck converter. Could it be a bad diode only getting half a sine wave? I added a bigger capacitor in and the voltage went up with a capacitor. About 0.8v-1.2voc, with the capacitor. Its fishy. So im building another. Id love to get 30-40 ampst 13.9v. but doubt this will happen. And planning to use a programmable relay, to shutoff when it gets to *13.8v-14v. and back on if it drops to 13.0- 13.2v roughly! With a high and low output on it some how. Seems the microwave was 1100 or 1500 watts, 1000 watts at 14v- is 71 amp, plus a little, so pull the voltage down a bit. And drop the current to safe levels. I guess i need to pull a few turns...
The 3 'little transformers' having a party. Are they 3-phase or just AC/DC?
And if they went 'live' they should have had their terminals insulated, to avoid the little accidents.
There are just too many jokes/entendres from this topic, such as knee-tremblers, flashing, petit-mort, etc.
I thought you'd been collecting transformers for some method of graphene production, or is that in another video?
Not at all related to this video but is there a chance you could do a video or maybe even build what is known as the icey ball early AC I just discovered it a week or so ago and was like Wow it’s pretty neat and I can’t think of anyone better to explain it and he it works
Thanks for you vids always great stuff
All those applications would work more efficiently if you incorporate high resonant operation frequencies
And how do you do that?
How do these make inverter from DC voltage to AC voltage
Was that Luke in the backround - great to see you !
Please don't make this a membership only video, this one's a HUGE help. Thank you!
Good explanation Robert, sorry i didn't understand your uploads i understand them now, but I'm unsure if if there is enough money to go round to pay the bills 😢 i offer what the business paid for my council tax but my sister wouldn't let me an my mum pay it when it was our bill so now i have to pay the business bill but I'm only willing to pay what my sister payed the council tax as that was my bill ang not the 11kw pumps for the farming watering business 😢
Remember kids, THIS STUFF CAN KILL YOU EASILY! Learn about safe procedures, tools, and protective gear, practice on low-voltage, low current things.
Been watching your videos for years and never been disappointed. Watched a video on plasmoids that impacted the pipes under a electron microscope by Bob greenyer.. what are your thoughts on this?
Backpack EMP
Do you (or does anyone here) know the minimum cuttoff to build safety skills with a MOT?
As an example, can I use a AA battery to test as my "high side" voltage? Do I need a 9V battery? A 12V lattern battery?
Not sure if you have already convered this, but what can you do with all the magnatrons? (I have a stack of them in one of my lockups and am a bit wary after reading about their potential radioactivity!)
Radioactivity is negligible, there's far more in all the wifi and other waves surrounding us all the time now.
There's "thorinated tungsten" in them that produce the microwaves (when it's powered).
The biggest danger with really old ones was in the magnetron there used to be beryllium, which if broken and caused airborne dust, could cause beryllium poisoning. But they don't use beryllium anymore
@@RedDeckRedemption Excellent. Thanks for the info.
Thanks for your videos and sorry buddy. I'm alone now also....I hate it.
Magnetron..
guys i have a microwave transformer and i want to mess with it, but i just messed with arduinos till now so idk much about electricity and idk how to mess with high voltage properly. like i said i only did some arduino prjects and a few projects like voltage multipilier but ig its nothing near this. how can i practice without killing myself? i feel like i shouldnt just jump in to a project like these ones bc of high curreny t
CAUTION !!!! CAUTION !!!!! ....... order of operation connect wires..move away from high voltage... then apply power.......I have cautioned you before about this very thing previously , TRYING to get your ink but the link is not working is it, for sale some where else????
Mr. Murray-Smith, thank you so much for doing this video. I have been searching for a way to tune arc flashes.
I shall be destroying a microwave soon.
🙏
Thanks Rob! It's only Stanley Meyers iron ion HHO maker left, but thats a hardcore thing to build! Even for you!😄 /Mikael
seriously?
Staney Meyer said "Ones a saw a iron-spoon in a microowen and it sparkt with flashes! And after that I try to get that effect in my HHO process!". /Mikael PS. Naomi Wolf this don't lower Robert fine work! But now then Toyota are building a car going on Water or Brown gas HHO! It get intressting again! And I just love Roberts approach on this question about Micro wave ovens! But Stanley Meyers beachbuggy can be the future 40 years after he died! DS.
@@mikaelfransson3658 hydrogen does not make much sense as energy storage, sorry i dont believe in a future with such "water powered cars".
@@naomiwolf8944Okay in water the energy is near 3 times more then oil! So if half of that energy goes to make HHO is still more than our gasolindriven cars we have today and we fill our's car whit only water! So our fuel tank have only water as fuel! /Mikael
👍
I sent u an email and I hope u get it..I want to talk to u about super caps and turbines….and I am woundering why u aren’t working on super caps….. I think we can create perpetual motion many different ways … I want to know why they aren’t using this tech into today’s practical science.. it seems there’s. Patents on everything even some anti gravity stuff …yet the world isn’t ready for perpetual motion vehicles yet? Hydrogen engine hopefully will be available to public soon …I live in USA where the government assainated anyone that builds such concepts. Mr murray
I think you did not drive home the danger enough. As in, you (reader) should probably never do this. Death via microwave transformer has become way more common in recent years since videos like this have emerged. I'm not trying to throw shade. I'm being serious.
Yes exactly this. There's two groups as far as I can see: there's the people who don't know any better and are following a video, and there are people who should know better and are arrogant about the risks involved.
I'm an EE so if anyone comes across this comment and has questions re:safety I'll try to respond.
I saw the big yellow sign at the front of the video...said something about danger of dying. I'd say that covers it 🤘
@@aaronsweeney3763 yes followed by 20 different ways to flirt with the grave. 🤣
@@IrishSkruffles me, a controls engineer who works in 480V panels with VFD’s and stuff, would be especially hesitant trying the last two.
Drone
Have you quit producing videos or heaven help us did something happen to you
I'm afraid he may not make anymore either
but I understand if so
Zap
Nice projects.!
How about this?
Just a big spark gap that connects to a 50 foot length of wire that runs up a tree. Attenuate it with [whatwver]. Your entire neighborhood will be able to tune in.
I bet a 5kw spark gap with a 50 foot antenna would probably get you an FCC visit.
If you are ever bored...
Hi can I share an idea of mine with you regarding wind turbine design... I don't have any equipment nor opportunity
I would appreciate if you would be kind enough to check. My idea if it's possible or not @ThinkingandTinkering