What can I do with that old Microwave Oven Fan Motor
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- Опубліковано 1 бер 2014
- I was surfing Lidmotor's channel looking for simple circuits and spotted that he used a coil taken from the AC motor that powers the cooling fan in a microwave oven. I recognised it straight away as I have one in my bits box that I took out of a microwave oven I disassembled last year. Obviously I thought that would make a good subject for an evening project. I haven't followed through with the whole project as I don't have a suitable neodymium magnet for the next stage but it was fun just getting to this stage and I have my LED lighting from the 1.5v AA battery in typical joule thief style. You also get to see me disassemble the AC motor to extract the coil. If you want a circuit diagram you will have to watch Lidmotor's video.
In response to a question I am adding this information
If you flip the stator, so it sticks out the opposite side, the motor will spin in the opposite direction. This is an AC motor, AC = alternating current. So connecting the power wires either way will make it run. The one in this video is running on 240 volts in the UK. USB is DC (Direct current NOT AC) at 5 volts, so you cannot run this fan from a USB port.
Here is a Wikipedia link for details of this type of AC shaded pole motor en.wikipedia.org/wiki/Shaded-...
Lidmotor's Light Multiplier • Light Multiplier
Johnydavro's replication • Lidmotors light multip...
For those of you who want to light LEDs from a single AA battery but don't want or have a scrap microwave here is a simple project using small axial inductors • Let's make a Low Power... and here is one that uses garden twist ties • Let's make a Low Power...
BOTH are based on Lidmotor's videos and have links in their video descriptions to his videos.
Several people watching my video want to talk about Joule Thief circuits so here are a couple of excellent videos on the subject by RimstarOrg
How a Joule Thief Works • How a Joule Thief Works
Make a Joule Thief for Zombie Batteries • Make a Joule Thief for...
Here is BigCliveDotCom on the same subject
How to make an authentic Joule Thief • How to make an authent...
Here is a handy article on LEDs www.petervis.com/electronics/l...
Several commentators insist you can light a white LED with 1.5 volts and one sent me a link for a 1.2 volt white LED however a quick look at the datasheet shows this "LED" package actually includes a driver circuit that runs the LED static.rapidonline.com/pdf/53... this could indicate that these are being used in schools and colleges and misleading the pupils causing confusion. It is however an interesting item and may help people who need to run white LEDs from lower voltages.
I did this follow up video for those people who wanted me to make a fan from the fan - What can I do with that old Microwave Oven Fan Motor #2 • What can I do with tha...
Some links for related projects
Microwave Oven projects • Microwave Oven projects
Joule Thieves • Joule Thieves
Things you can make from an old DVD drive • Things you can make fr...
Disassembly • Disassembly/Tear down
Let's disassemble a Microwave Oven • Let's disassemble a Mi...
I made this crawlerbot tortoise and used the turntable motor from this microwave to power it
Bargain Store Project #45 Washing Up Brushes Tortoise Crawlerbot • Bargain Store Project ...
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Quite interesting for sure. Nevermind how basic it is, it shows us much more than we can see. Nice video Bro. Thumbs firmly up.
Hey thank you for such a nice comment 😊
Love the simplicity :) brilliant! liked and subbed :)
I have scrapped hundreds of these fan motors and I have made a simple jig for removing the coils rather easily. You need 3 small blocks of 2x4 about 6" long. 2 stand up on the 2" side under the sides of the motor and use the 3rd laying on top of the motor to apply light hammer blows. The coil and lamenated core can be extracted without further disassembly. These cores are simply pressed in at the factory and can be pressed out just as easily.
Thanks for the tip 😊
I too thought your discovery was interesting, that moving a magnet in the coil's field started the oscillations (or whatnot?). Like you said probably old news to people in the know, but it's new to me. Cheers
@Chuck Norris I don't think you're the real Chuck Norris
I just found your channel a few weeks ago and subscribed. We like doing the same kind of projects. Slider and I have been doing this for a few years now and have worked on several projects together at the same time. It is great fun and I'm always glad when I find someone else who enjoys the hobby. Thanks for trying out this "Light Multiplier" project. You need a diametrically magnetized ring magnet for the spinner part. The circuit is like a blocking oscillator but not a true Joule Thief. The circuit does go into self oscillation, as you found out, but is meant to be triggered by the spinning magnet rotor. I really liked you pizza pan plane project and was thinking about trying a miniature build using plastic drinking cup lids and straws.
Hi Lidmotor, thank you so much for the comment. I enjoy trying your projects and your work is always well presented. Some of mine can be a bit rough round the edges as I have about the same attention span as my grandchildren. The electronic projects are probably still beyond the 5 year olds, hence the number of cars, boats and planes, but my granddaughter is 10 and has an understanding of what is going on, which is brilliant.
Thanks for the informative video. Nicely done and good design on Joule thief. Trolls probably think Joule is misspelled too.
Thanks, I found it interesting to try circuits shown on other people's channels to see if I can replicate them. I don't claim any originality for this project. There are related links in my video description.
Very cool idea.
Thank you, it was not my original idea, there are links in the video description to Lidmotor's work.
Thanks for head up on lidmotors. You and him have some interesting work
Thank you. Lidmotor takes more care with his projects and understands how they work. I just have a go and see what happens 😊
did you ever try spinning this with a drill to see if it generated power? I have an idea brewing that may actually do something awesome. I just took apart my microwave and have the identical fan assembly so I will be trying what I am thinking!
Marc Belanger Did you ever try it?
No magnet.
It is an ac asynchronous induction motor with shaded poles to get it roating image.slideserve.com/734624/shaded-pole-motor-n.jpg . The shaded poles delay the phase on one side of each pole to get it rotating in one direction. You would not want the fan to spin backwards. It motors when the spin is slower (negative slip) than synchronous with the grid frequency, 3600 rpm. If it is spun faster than than synchronous, (positive slip) it will feed power back into the grid. Point is, it has to be connected to the grid to produce power. To make maters worse, the shaded poles used with single phase induction motors reduce the overall efficency. This is motor as a generator is generally not very usefull.
Did you know that those bearings on those end pieces that were holding the core in the middle can rotate off the center? I stuck the shaft from a motor like that in one of the bearings and pushed it to the side and it rotated and didn't move back. I did get it centered again but it was kind of hard. I also did the same thing to a fan motor from a school bus fan where the driver sits, but the problem is I could not get the brushes back in the holders.
It seems that this is the first time you've seen a motor!
Great video
ZIMALETA HOW TO SHOW & UNBOXING thank you
I repurposed a fan from a microwave oven into a passive/active cool air circulator for my air conditioner. It helps put cool air where I need it. Yes, I wired mine up so I could plug it in and use it in active mode. I also use it to cool capacitors when experimenting with electricity.
I use my microwave fan to push air through my radiator that I have my outside wood burner hooked up to and it heats my barn to a nice 50°F on a 20°F night so hell ya. Here's to being bored and never growing out of the curiosity of a child. Cheers
These little fan motors also act as a transformer and drop the voltage on the tap coming off the third prong to 21 volts to run a geared turn table motor.
Hi, just going back through old comments trying to add some words to comments that I only "hearted" at the time 😁 thanks for the information.
Excellent project sir
Many thanks
Man, you converted a good fan motor in a simple joule thief.
Yes that is right. The motor was salvaged from a scrap microwave oven and was a handy source for the coil I needed. That made more use of it than dumping it down at the recycling centre unopened. I've seen people take microwave ovens apart just to get the piezo speaker 😊
You can pop the coil out without disassembling,note the separation line on each end of coil,use wood to give a sharp crack with a hamer and waa la
Maybe 😁👍
I also found that to be very interesting...that was pretty cool....I also am interested in doing all of these type's of experiments..I have a very inquisitive mind...I like watching and learning this kind of stuff...but...I learn alot better by doing it...unfortunately I need instructions to understand electronics
Thank you for watching and commenting. There is a link to Lidmotor's video in the description, he does lots of these interesting electronic projects 😊
Hi, well done for your video!
Could you tell me what the value in ohms each coils please! Many thanks!
I didn't measure it and even if I could find where it is in my junk pile I would have to desolder it to get a clean reading. Here is Lidmotor's original video that I copied the idea from and he does not mention the values either ua-cam.com/video/faDZLDUls48/v-deo.html
I probably w/hv stopped at the "turning" mechanism part of this exploration for myself.My problem is that I am trying to adapt an application to motorize my worm casting harvester to make it spin @variable speeds to facilitate the separation of the castings from other materials. This was interesting to me, but I can't envision it helping solve my particular set of issues. Keep posting vids, Respectfully, Margo
+Margo Fr thanks, yes this was not intended to be a technical video, I just like tinkering. UA-cam always throws up odd videos when you are searching for something and that usually takes you off at a tangent to your intended path. Good luck with your harvester, it sounds interesting.
thank you sir i learned something it was interesting for me too
So nice of you 😁👍
Nice!!! thank you
Thanks, you may find the information in the video description useful 👍
@@GrandadIsAnOldMan outstanding!
Sooo cool! I'm curious how you first found this out. Did it just happen near a magnet and so you put the two together or is it common practice; if something doesn't work just give it few love taps with a good ol' neodymium lol Anyway thanks for inspiration:)✌️
You will find more information in the video description.
this man has good ideas granddadisanoldman
FYI: It would have been _much_ easier and faster to have supported the lamination stack in a partially opened vise and just used a hammer and punch to alternately tap on each end of the iron section that passes through the coil just to the inside of where it meets the main stack of laminations. That is essentially just the reverse of the way it was originally assembled.
Well not something I would waste my time on but it is cool how the magnet kick started the coil up to completed the circuit.
Thanks that was interesting.
Thanks, as I said in the description it was inspired by a project by Lidmotor as I had dismantled a microwave and had the parts laying around, I didn't even do the full project as I didn't have the right magnet to finish it. If you scan down the comments below you will find Lidmotor's comment on my effort or you could click on the link below to see what should really be happening here.
Lidmotor's Light Multiplier
ua-cam.com/video/faDZLDUls48/v-deo.html
Thanks good work.
Thank you.
You didn't start the coil 'resonating', you induced enough voltage to overcome the forward voltage of the led, which opened a path that prevented the voltage drop from the resistor.
I am afraid you have lost me with that explanation. Where does the voltage drop from the resistor come into the explanation? Could you give a bit more detail?
@@GrandadIsAnOldMan My first comment was rushed.
I went through and analysed your circuit.
What is happening is when you turn your switch nothing happens because the transistor is in the closed state because there in no voltage on the centre pin, the gate.
When you induce a voltage in the coil with the magnet you are opening the gate. With the gate open the battery can now send power and it keeps the gate open through the resistor while also powering the led.
Sorry for my initial hasty response by the way.
@@samshygiene3202 You are close but you are still not there. The battery is not lighting the LED, it does not have enough voltage. You already mentioned the forward voltage so I thought you might have spotted that 🙂👍
@@GrandadIsAnOldMan
You claim to be no expert and refute my analysis without giving a single piece of evidence or explanation.
Show your circuit working on camera, switching it with the magnet, desolder the LED and put it across the battery terminals, it will light up.
All you made was a magnetic switch.
For a circuit like yours to act as an LC oscillator and boost voltage it would need much more capacitance and you do not have a capacitor or enough parasitic capacitance to start an oscillation.
I was going to ask about putting the core back in the coil. Then I remembered that a Joule thief coil is wired in two directions. BTW - Don't take that motor apart - it's a perfectly good motor and fan! ;-)
I have enough fans and motors 😁 In fact, in my recent tidy up session (where I was trying to clear enough space in my work room to allow me to get back in there) I threw out several that I had scavenged years ago and never did anything useful with. They were just taking up space so I dumped them. Still haven't got enough room to work in my work room, but I can finally sit on the chair. The desk is still piled high, but the floor is clear.
Thanks! I did it but I thought that the induction wil be greater. For make an electromagnet is useless but connecting a red led and using neodimium magnet attached to a Bored I made the led turn on
Well done 👍
What can you use a magnetron from a microwave for other through it away?
Jerry Thompson there are many videos on UA-cam where people use them. I think it is a dangerous project depending on your level of knowledge and competence so I will not give you any links. The magnetron also contains harmful metals.
Jonah E yes you can and many people do, I have several myself, however I would strongly urge you to read up or search the internet to understand what the dangerous metals are, where they are, and what the potential risks are. This is a handy video and well worth reading the comments on it ua-cam.com/video/4Zev8Ws4P1Y/v-deo.html
Fun fact: here in the US, the actual motor part of the fan is often identical to that of a bathroom exhaust fan. I had a noisy exhaust fan in my new apartment, so I replaced it with a microwave fan
👍 thanks
I might have a very noisy fan in my toilet. It started too make a loud vibrating sound about a year ago.
@@captainprototype187 it might be the bearings or it might be as simple as a build up of dust blocking the blades. A good clean might fix it.
Hey I wanted to ask you if you could fix a motor fan the two switches that connect to that big cooper wire
I don't understand your question but as far as the thick copper wire that was round the metal former is concerned there is no electrical connection to them. To understand their purpose you need to read up about shaded-pole motors. Here is a Wikipedia link en.wikipedia.org/wiki/Shaded-pole_motor
that high pitch sound would do my head in
One of the benefits of being an old man is that I don't hear high pitched sounds.
@@GrandadIsAnOldMan yeah I'm not a fan if high frequency noises. it could be flyback if you're still using crt tv or any transformer inductor. maybe it's coming from the camera itself
@@GrandadIsAnOldMan watching this because I stripped 2 tesco microwaves the other day. how do you actually drive these motors, does ut require modulation from microwaves control board ?
@@SodiumInteresting The motor is a shaded pole motor, you will find information about it in the video description. This one runs off 240v AC mains supply. As I don't hear any high pitched sound I cannot be sure what you are referring to. However, it is more than likely it was the camera as back at that time (2013-2015) I had several comments about it and from July 2015 started using a notch filter or low pass filter in the audio editing to remove it. You will spot in the video description of some of the videos from around this period a line of text stating
Filmed using FujiFilm FinePix S4800
Edited using Serif MoviePlus Starter Edition
Low Pass Filter 6500 hz
or
"I originally published this video in 2014 however unknown to me many of my older videos have a high pitched whine in the background caused by my camera. I cannot hear the noise but many younger people can so I am editing the sound on some of the more popular videos that have been affected. We are possibly talking hundreds of videos so I don't think I will be doing all of them. All the videos since July 2015 should be OK as that was the first time the problem was highlighted and since then I have been using a low pass filter. It's a shame UA-cam does not offer sound editing in it's editing options."
I think you have explained how my crummy "pump action torch" was designed to behave. When I pulled it apart it had a tiny button battery hidden inside, and I thought "That's cheating, having a battery inside"! It had a weak magnet that rotated within a coil when the lever was pumped, which presumably just boosted the current of the (by now), almost flat button battery to the required forward voltage for the three white LEDs to light up. Can't remember if there was a transistor included in the circuit, but the action you demonstrated was similar to how this torch behaved.
No, I am familiar with those torches and they are quite different in the way they work. They are a simple generator with a coil spinning round a magnet directly driving the LEDs. Here is a project I did with one in 2013 ua-cam.com/video/tk5mMRrbhEI/v-deo.html
Yes the innards of my torch was exactly that, but with a different casing that revealed the gears via a clear plastic window, and I thought a nice DC motor in there too! But as you demonstrated, just a very weak rotating magnet within a little coil & metal poles, which had to be supplemented by the 3 button batteries ("cheats!") 😯
+dav snow ... I have this flashlight also... The batteries are in there so you don't have to keep pumping it to have light...the generator charges the batteries to operate the light after you quit pumping.
pwrovld : Your torch is unusual, in that it must be supplied with rechargable batteries. Mine are simply standard button cells and thus are not rechargable, no matter how much pumping enthusiasm you may engage in.
Is there any change to use this motor all the way to its original source of current without making anything like a fan. Or need something adjustment to make a small simple fan for long use. I have same motor with 240v class B. While I used directly, the copper widing become very hot within 2 mins. Please suggest.
Shaded pole motors are not very efficient. Maybe this Wikipedia link (from the video description) will help you en.wikipedia.org/wiki/Shaded-pole_motor
huh, i never thought of doing it like that. I always just take a knife and a couple of pliers and pry apart one side by the coil until it pops out. take about a minute but you mangle the metal.
Looking down through the comments here, several people suggest just tapping it through and another suggested cutting through at the thinner cross-section point. I guess it is just a matter of what you are comfortable doing. On some other tear downs I have found the plates are stuck together with some sort of clear resin or varnish. Until you have taken it apart you really cannot predict how it is held together
Hello. a question out of curiosity, what websites do you usually find the most interesting circuits from?
I would not know what you would consider interesting. On UA-cam I subscribe to Lidmotor, Slider2732, RimstarOrg, magnetman2010, Cool Joule, Electric Experiments Roobert33, Ludic Science, Thomas Kim, bigclivedotcom and several more. For general websites I just search for a specific circuit diagram using Google Search on images.
The bearings in these are my favourite as with a little energy they go on forever... still love the fidget spinners tho.
It is handy to find uses for scrap items
@@GrandadIsAnOldMan not sure.. most of my items are scrap.. I'm watching opal hunters on tv and it remind me of looking for microwaves in a scrap yard.... the only object or tool I ever bought was the best tool one will ever need.. well 2.... first a soldering iron and 2nd being a multimeter.. 2 things ul ever need. With salvaged parts you can built absolutely anything you want.. let the games begin.
How to increase speed of it..?
You could play around with the type of transistor and the resistor value. There is not much else to change.
As you say the circuit is more popularly known as a Joule Thief - Big Clive is credited with the name, the circuit itself has been around for many years.
In reality it's better to wind your own coil - A JT coil uses the centre tap but only needs about 30 turns - the wire in that big coil would probably make 1000s of JT coils.
For the puzzled - it's a useful circuit for using a single cell to light a LED - if you look on fleabay there are many types of JT as well as buck transformers for efficiently converting DC voltages up and down. I have one aaa cell lighting a 5M string of LEDs. It's handy as a pocket sized tester and saves needing to carry transformers etc.
Thank you Andy, you might find my video description helpful too 😊
Was the coil even necessary ???
You can light up at least 4 LED's with just the AA battery !!!
+Don Kocielko perhaps you can demonstrate how to do that? I would be interested to see that. Please include the full details of what LED's you are using, such as the forward voltage they require as I am not aware of any that need less than 1.7 volts and white ones are more like 3.2 volts
+GrandadIsAnOldMan
You can see my flashlight at Harbor Freight Tools. com. It has 24 LED's and requires 4 AA batteries.
Which 24 LED'S divided by 4 AA batteries equals
6 LED'S per 1 AA battery.
The light is a 3" x 5 " rectangular flashlight that is blue and has a bulb light also and magnet and hook on the back.
Don Kocielko I am afraid that dividing the number of LEDs by the number of batteries is not the right way to work out the voltage. With the right amount of current you can light as many LEDs as you like in parallel with a voltage of somewhere between 1.8 and 3.2 volts. The LED will not light until you provide sufficient voltage to meet their forward voltage requirement. Typically a white LED needs 3.2 volts which is why your torch has 4 AA batteries. The 6 volts you get from the 4 AA batteries is probably fed to the LED array via a resistor and then they are all in parallel so each LED gets the same voltage across it which will have been adjusted to be at least 3.2 volts but not significantly more as the LEDs would burn out. Without a resistor they might be arranged in pairs so each pair can handle the 6 volts or they may just all be higher rated to take that load. I have a similar cheap torch here that has 9 LEDs and 3 AAA batteries. In that one the LEDs are all paralleled together so each LED will be taking 4.5 volts. If I make the assumption that you live in the USA I think your home voltage is 110 volts and all your house light bulbs are also 110 volts. Each one requires 110 volts but when you have lights on in 4 different rooms that does not mean that you are now supplying 440 volts to your house. In the video description I gave this link that gives you more information about LEDs including a simple table of their forward voltages www.petervis.com/electronics/led/led-resistor-calculator.html
Don Kocielko if you are interested I used one of the lights you describe with the 24 LEDs in the first of these 3 videos. It appears late in the video so I have set the video to start at that point Bargain Store Project #61 Old Torch New LED Array ua-cam.com/video/Tgg8cmAgT9M/v-deo.htmlm28s
Bulb to LED swap in small torch ua-cam.com/video/s5ZtYxpIfOQ/v-deo.html
Incandescent bulb to 1w LED swap ua-cam.com/video/SD1Q9wRePxg/v-deo.html
Don Kocielko
I was going to use the fan for the forge I made but the fan turns counter clock wise so now what how can I turn it around to clock wise
Jerry Thompson if yours is exactly the same as this one you may be able to take the armature out of the motor, turn it around and put it back in the opposite way round so the longer end of the shaft points out the other side, then turn the rest of the motor round so it has the shaft back through the casing the right way and re attach the fan blade.
how do you get the magnets off the metal brackets from the hard drives? i have several laying around but they are all still attached and it makes them a pain to use
+David Yarbrough most people seem to bend the metal bracket. I don't think there is a completely 100% succesful way but it seems to work most times. Here is one example ua-cam.com/video/GQhSy-Kz5DM/v-deo.html and here is the search I used ua-cam.com/users/results?search_query=remove+magnet+from+hard+drive
ok. i was worried that would break the magnets
David Yarbrough there is a good chance it will, you win some, you lose some. As long as you are bending the metal bracket and not the magnet you have a better chance of success than trying to jam something behind the magnet to lever it off. I haven't seen anything that I would consider 100% successful.
+David Yarbrough Whenever I try to remove them they always seem to break, the rare earth (neodymium) magnets are very brittle and are also very thin. What I usually do is just use a dremel to cut/grind off as much of the back plate as I can, leaving just enough metal at the back to support the magnet.
So if moving iron rod were put through the core at speed, that would also light the LED wouldn't it?
Maybe you should build one and try it. You need some magnetism somewhere to create some current so unless the iron rod has some level of magnetism then I doubt much will happen. Faraday's law of induction is a basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (EMF)-a phenomenon called electromagnetic induction.
I'm not a wizard when it comes to electronics. but what I think is that the transistor was an open circuit until you tap your magnet against the coil which induced a electrical current to the transistor then once that happened it cause the current to flow through the transistor and as long as there was current in the coil it kept the transistor producing a closed circuit
You are part way there, but there is more to it than that.The current and voltage from the battery is not what is lighting the LED and in fact would be insufficient to light the LED if you just connected the battery to the LED. It is the "back spike" from the coil that is providing the voltage. The Transistor is being switched on and off very rapidly and the LED is flashing very fast but to the eye it appears to be a permanent light. This video by RimstarOrg gives a good explanation (the link is already in my video description but I will paste it here for you) ua-cam.com/video/0GVLnyTdqkg/v-deo.html
GrandadIsAnOldMan thank you for the feedback. Does the double windings in the coil step up the voltage to break the voltage threshold of the LED?
No, it is the speed of the magnetic field collapsing is inducing a higher voltage than the battery used to create it. That is why I referred to it as a spike. If RimstarOrg's video didn't make it clear for you then maybe this one will do it ua-cam.com/video/N20gG6bDRlo/v-deo.html it is a longer video but it goes through stages to explain the process. You could jump to about 13.30 in that video to get to the summary.
GrandadIsAnOldMan got it thanks
I has found it is much less dangerous when using high power (which can administer a nice size jolt and even zap u in some cases) to use a good rubberized shoes to protect you from high power electrical devices esp when energized when dealing with exposed wires. I has used electrical devises such as this for many things even zero energy devises(very handy for remote location) hope this helps. Voltmasternyc out
Wearing rubber shoes will not protect you when you touch a live contact with one hand and touch something earthed like the metal frame, with your other hand.
@@GrandadIsAnOldMan this is not correct always use a good rubber not the cheap china made brand. Such as Walmart type. Actually the science works like is a car where you drive over downed power wires that have up too 440 with being injured. The tires keep you safe from the voltage due to insulation factors. Also no not do this without good quality wheels such as a bf goodrich
Bf goodrich are more compared to the j&j of tires compared to Moderna
@@J.D.Shelnutt you are talking utter rubbish. I strongly suggest you do not rely on rubber shoes when handling power wires. As I said, if you touch a live wire with one hand and an earthed case with the other hand, the power will flow through your hand, up you arm, through your chest, stop your heart, down your other arm, out of your other hand and into the earthed case. At no time will it be trying to flow down through your body to your rubber shoes. Your example of a car running over power cables is completely misleading. There is no reason for the electricity to flow into the car if the power cable is laying on the ground. It is already earthed. If you reach out of your car and decide to pick up the cable, then the electricity will want pass through your hands and down to earth. There might be a chance that your rubber tyres might save you then, but I expect the electricity would arc to earth as soon as you tried to lift the cable from the ground, frying your hand in the process. Your safest course of action would be to stay in the car because inside a metal box you would be safe anyway, rubber tyres or no rubber tyres. Look up Faraday Cage. If you want a sensible explanation of electrocution you might like to watch bigclivedotcom's video on that subject ua-cam.com/video/9webTbqTH5E/v-deo.html
You see if you are to make a cage with high powered wire then when rubberized coating is removed you still get zapped you see it isn’t if its in a certain shape the power still will flow through. Only when covered with rubber can you be sure not to get energized. It’s actually quit simple. Also i think it scare kids from playing with electricity experiments to try to scare with stopping your heart. Any if you do not take me serious then i tell you to take shoes and stand in a liquid and then tell me a good rubber wouldn’t help to withstand!
You can also make an electric magnetizer / demagnetizer for screwdrivers!
Yes I am sure you could.
GrandadIsAnOldMan YOU DISASSEMBLED THAT MOTOR JUST TO MAKE THAT!?!? YOU STUPID, YOU COULD'VE MADE SO MUCH BETTER STUFF FROM IT THEN THAT STUPID CIRCUIT!!! AND WHAT CAN YOU EVEN DO WITH IT OTHER THAN TO LIGHT UP THAT TINY LITTLE LED!?? YOU STUPID!
Hi TheElectricMan, thanks for commenting. I am guessing you didn't follow the commentary or the video description and you managed to hit your "Cap's Lock" key so you typed all that in capitals. I took the microwave oven apart for the component parts at some time in the past. The fan was of no use to me at the time so it went into my stock. When I needed a coil/solenoid it was an ideal source. Do you have a suggestion of something else useful I could have done with it? I see you have nothing uploaded on your channel so maybe this would be an opportunity for you to make a video and share your skills with other UA-cam viewers. Perhaps you could make a simple Joule Thief circuit as a start to demonstrate lighting LEDs with less than 1.2 volts 😊
Well, you are actually right about that fact that I didn't read the video description... Sorry about shouting at you. As a suggestion, you could've made a simple table fan. I didn't know that the fan was a "spare part" to you at the time. Again, sorry for my lack of knowledge. And by the way, it's a pretty neat Joul Thief that you made with it. 😊 Have a nice day, Sir.
Hey thanks for coming back, yes table fan but I really don't need one and that would simply be using a fan to make a fan so no change of use or "upcycling" as they like to call it. On my desk I tend to use old PC fans although I currently use a USB powered fan that I bought for a project, used it for that and then restored it and used it for it's original purpose 😊
Wow!!! Thats the simplest joule thief ive ever seen!! I can tell how it works just by looking at it!! Crazy simple!!
Can I do a similar thing with a toroidal ring with some wire wrapped around it so it goes like winding with - being wire and | being center tap wrapped around the toroid a few times tightly. ----|---- and 500-1000Kohm resistor and an NPN transistor??
I'm thinking I can use the 500 or 1000 ohm resistor in series with the coil. and a 100-500 ohm resistor in series with the switch.
Will that work?
I guess the obvious answer is build it and find out. That is what I do and that is how you learn 😊
GrandadIsAnOldMan I dunnot how to exactly start though. Is the resistor in this pic going to the base of the transistor? and I had an idea I could use a much beefier transistor with the primary side of a transformer?
Have a look through the video description as there are some better examples linked there.
The reason the led didn't light before using the magnet is bc ur circuit was dc not ac, the battery gave it a sort of ac effect and that started the led.
Rather than me start the whole explanation process over again, please either read the explanation in the video description or read some of the replies I have already given to the comments here. In short, you cannot light a white LED with 1.5 volts. The forward voltage for a white LED is around 3.2 volts. Nothing to do with AC or DC.
why not go from battery to l.e.d? why transistor
The battery will not light the LED. Have a read through some of the comments here already or maybe read the video description.
I have national convection microwave the issue is my house fuse gets blown out as soon as i start the oven could u pl advice to fix up this issue
No sorry I cannot give you any advice on that subject.
The breaker may be old(After they pop once they pop slightly easier, over the years they get worn out from popping) or you have to much amperage draw on that particular circuit and the breaker is doing its job just fine. Try using it in a different area in your house. If you pop a different breaker you have a faulty oven.
YOU KNOW IF YOU CONNECT A BRIDGE RECTIFIER THEN THE LED AT THE END OF THE AC SIDE AND PASS A MAGNET OVER THE FERRITE METAL YOU WILL PRODUCE SOME LOW DC ABOUT 5 + OR SO I HAVE TWO HOME MADE WIND TURBINES THAT I HAVE BEEN EXPERIMENT ON AND WILL BE DOING A VIDEO SOON USING THEM AS PROTOTYPE BEFORE INVESTING IN COPPER WIRE AND EXPENSIVE MAGNETS
YOU KNOW YOU CAN TURN OFF THE CAPS BUTTON BY PRESSING THE CAPS BUTTON AGAIN!!!
Hello
Great video! I want to use a microwave fan motor and see some with a protective film to protect the coil. What is this film called? Do you know where I can purchase such a film?
Regards
I am not sure about any protective film for the purpose you describe. However, Kapton tape is regularly used on electrical components that are likely to get hot, so I suggest you Google "Kapton tape" to see if that is what you are looking for.
@@GrandadIsAnOldMan Hello
Thank you for clarifying its name. I am interested in protecting the coil from potential moisture and I see that it offers some protection for that.
Regards
@@MBMB-sz1ye to be honest, I cannot see why you would want to protect the coil from moisture. The wire is insulated, so it would not be affected by moisture. Wrapping the coil in tape may actually prevent it from cooling, although Kaptan tape is heat resistant, so the tape itself would not be a fire hazard. Any terminations could be coated with something to insulate them if you are planning to use it in a damp environment. On RC model electronics, they often coat the electronics with nail varnish to waterproof it, but not if it is likely to overheat.
@@GrandadIsAnOldMan Hi
I am actually using the motor in a WaterPure water distiller. The original one that failed had some tape on it, I assume to protect it from steam moisture. Do you think that is the reason?
Are all such motor coils already insulated? The wires from the original power were secured under the tape (not spade connector). However, my new motor has no tape and the there are terminals which I will use insulated spade connectors on. Do you think this will be sufficient?
Do you mean mail varnish remover or clear nail varnish? Why do they do this if it’s already insulated and not as you indicate necessary?
Apologies for all the questions but I am a novice?
Regards
@@MBMB-sz1ye the wires on the coil are insulated, logically, otherwise they would short together as they are wrapped together. It is usually enamel, like varnish. If they overheat sufficiently the varnish could burn off allowing the wires to short circuit. You can run electric motors underwater without insulation because the electricity flows through the wires rather than through the water. Water has a higher resistance that the wire, so the electricity takes the path of least resistance.
Regarding the use of nail varnish, I was specifically talking about the radio control circuit boards. Like any circuit board that you look at, there are surface mounted components. The individual components are not insulated. If water gets between the legs of the components, it will cause the circuit to malfunction. Covering the whole circuit board with a layer of nail varnish means that there is no where for the water to get in contact with the components. I have done it myself, when I am making radio control boats, but I don't worry about it for cars or aeroplanes. A simple example of a circuit board getting wet and malfunctioning, would be dropping your phone in a bucket of water.
Nice video buddy, I am learning all this stuff for 1st time too. It's very interesting for sure! I find the guys who really know what they are doing take the time to help you and explain things. The people who don't know much just act the smart arse to make themselves sound clever. You know what a smart arse who isn't very "smart" is though right! 😜
Just ignore the ones dishing out shit advise on how to do it "right". Like you say "they can make their own video".
I think it's a great video and very interesting. A good honest video! 👍
Thanks for watching and taking time to comment. As a creator you have to live with the comments, they all count as views and that is what really matters on UA-cam 😊
So I'm guessing what this simple circuit is doing is using the coil as a transformer, lightning up the build and return charge to the rechargeable battery
@@davidhansen9665 Hi David, I am afraid UA-cam very rarely notifies me of new comments added to old comments so I have only just found your comment (a year later) by luck. Probably way too late to give you a reply, but for the record, this is what I think is happening. The coil is being used to build up a magnetic field, while the transistor is turned on. When the transistor turns off, the collapsing magnetic field generates a reverse current spike that is a high enough voltage to light the LED that would not normally have had sufficient voltage from the 1.5 volt battery. The initial tap with the magnet created a pulse in the circuit to get it going. There may be some feedback to the battery but I was only interested in lighting the LED. In the video description is this link to Lidmotors video that inspired it and includes his circuit diagram that may help you ua-cam.com/video/faDZLDUls48/v-deo.html You will find Lidmotors comment amongst the other comments where he gives his opinion of what is happening.
That was the most complicated way of getting the coil off, that I've ever seen.
Fair enough. What is your preferred method? PS. Great snow sculptures on your channel 😊👍
@@GrandadIsAnOldMan thanks for the view. I have a lot of strange stuff there.
I simply twist the 'open C' part, and the center drops out.
The rotor parts are usually very free spinning.
I have a pile of these and currently trying to decide what to do with them. Considering putting them all in an array and making a strange box fan. Or just disassemble and melt.
The fans / rotors might end up being yard ornaments for showing the variations in wind throughout my yard.
Like I said, strange 🤔 😉🙄
put screw driver (flat head) beside the coil on each side and lightly smack it work it from side to side and the coil will slide out......simple
can you make a video on how to make Oven Fan Motor spot welder
I suspect you are referring to the videos of spot welders made using the microwave oven transformers. I feel they are too dangerous and would not feature one in my videos.
Certainly not my field of interest, but having watched it anyway, but first thought is what do you need the microwave coil for anyway? If your aim is to light up an led, why not just wire it to the battery and forget the mw coil? I don't get it.
I hav one...i want to turn it on but dont know which wire to use...any help
I am afraid if you have no knowledge of electronics then you will be putting yourself in danger. This is a mains power operated device so you will be at risk of electrocuting yourself. Here is a video where I connect one to the mains as requested by another viewer ua-cam.com/video/F1IESEC1dik/v-deo.html
I blow it up🤣🤣🤣
I didnt know because it had 3 insert pin🤣
@@Za-Here- I hope you didn't hurt yourself or cause any damage.
@@GrandadIsAnOldMan im safe, Thanks. I switched it off as soon as it exploded.😅
I AM SORRY FOR DOUBTING YOU
GRANDADISANOLDMAN.
ALSO THANKS FOR VIDEO'S AND FOR NOT RIPPING ME A NEW ONE SINCE CLEARLY I WAS WRONG. HAVE A NICE DAY.
Hey thanks, you made a logical deduction and a statistical person would still say you are right. Unfortunately that shows how statistics can be used to mislead people :) Thanks for taking the time to comment and I mean taking the time for ALL your comments. Other people have asked and will ask the same again so it helps to work through it. You have a nice day too :)
一
it's a tank circuit of sorts....the tap with the magnet biased the transistor enough to get it resonating
Certainly it is a resonating circuit although my understanding of a tank circuit is it contains a capacitor and an inductor and this circuit has no capacitor. Most people refer to this sort of set up as a Joule Thief. There are some handy links in the video description.
Well, just on inspection, the battery/resistor load seems to "act" as a capacitor....but you're right....a "true" tank circuit, usually used as a filter, has a capacitor, but the addition of the transistor makes the circuit act something similar to an Hartley oscillator as opposed to just a filter....Right? The math would have to be worked out to determine if a resonate freq could be attained within the parameters...but interesting--the transistor biasing tap from the magnet has my my mind wandering into sensor applications....fun stuff!
chris moles haha, you are over thinking this. I don't work to that sort of detail. I saw Lidmotor's video and realised I had the same items in my scrap box so I copied it.
Fun stuff! The tap with the magnet just got my imagination working....If the circuit could be tuned just right it could be used as lock, but as it is, it could be applied as a sensor, memory flip flop, SCR....etc....just fun stuff!
chris moles I can see where you are going with this. Of course you could just use a reed switch to activate a circuit with a magnet but not so much fun :-)
Dear Sir GrandadIsAnOldMan
I am very interested this your project Unfortunately I have some motor fan have only 2 pinout ( haven't center tap )
So please could you help me to know the resistance from center tap to other 2 pin out for rewind a new coil Thank you so much
I am afraid my meter is playing up a bit at the moment and probably needs replacement but the readings I am getting give me 360 ohms in one winding, 50 ohms in the other and 410 ohms across both.
Dear Sir GrandadIsAnOldMan
Thank you very much for your enthusiasm
to help me.
😊
Sick
😁👍
I've got 15 microwave transf and cap what can I do
+Vicu Dobre there are hundreds of videos on UA-cam on making things from Microwave components so I guess you will just have to do a UA-cam search and see if anything catches your imagination. There are lots of high voltage related projects that I think are basically unsafe so you will have to take care.
Thanks...how about the capacitors
What are good for....
It is bad disarm a fan useful for many other purposes. In any case it is not necessary to disassemble the laminations but beating with a small punch on the core end protruding from the coil.
😊
Do you think it’s possible to upgrade the motor in a microwave?
Upgrade it in what way? It's only purpose is to blow air across the microwave. It's not like it is going to take off or blow itself across the table??
@@GrandadIsAnOldMan Mine is not super powerful. I want to like get a stronger dc motor and have more suction so that when i turn it on its sucks up the vapors from cooking.
@@ThatsTheCombinationOnMyLudgage that is not a DC motor. It runs direct off the AC supply
was the coil a bifilar coil or a normal coil...?
+karan pandya my understanding of bifilar simply means that two wires are wound at the same time parallel to each other. Unless they happen to be different colours it is not easy to tell without attempting to unwind it. It certainly has a centre tap as that is why we used it. Why don't you google the components of microwave ovens to find out what components are used or even search eBay for "Microwave Fan Motor" as that pulls up hundreds of similar motors.
+GrandadIsAnOldMan ok sure.....!!!! thanks
you don't need the coil just put the rester in searese with the LED and it will light.
Well hello Donald. I am guessing you have no knowledge of the forward voltage required to run an LED, you probably haven't read the other comments and certainly haven't read the video description. Thank you for commenting, please feel free to do some more study work and come back when you understand what is happening here.
the kick is interesting magnet force
Yes, it is nothing new, but I liked the way it triggered the circuit into self resonance. I have made other circuits that work without the extra kick but once it happened on this one, it made it more interesting.
3:40 you could've just taken a flat screwdriver and a handle and hammer out the coil metal rod thingy out, much easier that way
Have you tried it yourself or just watched other UA-cam videos?
you could have made a spot welder or a stick welder with that coil beore you disassembeld the core, it is perfect to make such a welder.
+Parasar Bhattacharya I think you have watched other microwave oven videos and got the wrong part in your mind. This is the fan motor, you are thinking of the transformer.
no sir, the idea came to me as i saw you take out the rotoe af the motor, there is the part where you could have wound few turns of a heavy gauge wire, then connecting the original armature to the power it will reduce the voltage but increase current the same thing which a transformer does.Oalah you get your low voltage high ampere transformer which can be used as a welder.
+Parasar Bhattacharya - Ok I'm not going to waste much effort here but exactly what grandadisanoldman said....
not with this part. you said heavy gauge wire? well that's not from this part... so I agree and think you watch too many microwave videos and have them mixed up. maybe you should upgrade your current microwave to a newer safer model and please don't stand close and watch the food cook.
videoslue
well i would say you to try that first, and yes a heavy gauge.
I think Parasar if 'kind of' right BUT...
I believe the hole left by the removal of the rotor would destroy the efficiency of the core.
AND the fine wires of the primary would limit the output amps too much to work as a welder.
But as a step-down transformer I could see it being usable for something.
Especially if the core plates could be re-assembled into a more 'solid' shape.
Or if you made up new laminated plates for the core.
Have you seen the liberty engine build ?
Let me guess, is it some sort of free energy device 🤔
@@GrandadIsAnOldMan you guess correct.. its pretty cool 😎 give it watch its On UA-cam. The guy uses 3 microwave coils a electric asynchronous motor, a flywheel and few bits and bobs cable ties ect. Pumps out 20000watts
Yes, I am sure it pumps out 20000 watts, how much power did he put into it? And who measured the 20000 watts?
@@GrandadIsAnOldMan just watch it and stop procrastinating the action . You might be utterly surprised
@@GrandadIsAnOldMan ua-cam.com/video/wc-YYToexDI/v-deo.html
hey, are those blades metal or plastic?
Shouldn't those blades be metal to reflect the magnetic waves around the food when it turns? Or is it just to blow hot air around?
+Toby Que OK I am not an expert on microwave ovens but I am able to use Google search and Wikipedia. The fan in this oven is used to cool the electronic components and exhaust any waste heat. The metal fan or stirrer you appear to be thinking of is a different item. This microwave oven was equipped with a turntable to move the item being heated to distribute microwave energy. Here is a straight cut&paste from Wikipedia "Uneven heating in microwaved food can be partly due to the uneven distribution of microwave energy inside the oven, and partly due to the different rates of energy absorption in different parts of the food. The first problem is reduced by a stirrer, a type of fan that reflects microwave energy to different parts of the oven as it rotates, or by a turntable or carousel that turns the food; turntables, however, may still leave spots, such as the center of the oven, which receive uneven energy distribution." Find more information here en.wikipedia.org/wiki/Microwave_oven
Can this work on 115 volts ac
I am in the UK, the machine I took this out of would have been rated for 240v AC because that is what our AC is. If you are in a country that uses 115v AC then I would expect that if you took apart a microwave oven built for your country then the fan would be the right voltage for you to use. It will probably have the details on a label on the motor, so I suggest you have a look.
@@GrandadIsAnOldMan thank you so much bro also does it matter where you connect positive and negative?
@@kallmeronaldshorts2059 It sounds to me like you have no knowledge of electricity. If you are working on mains power with no knowledge, you are likely to cause yourself harm and maybe serious injury. If you are using AC there is no positive or negative. AC= Alternating current. If you are taking this fan out of a microwave oven, make a note of where the wires are currently connected and trace them through to the fan.
Tank circuit?
My understanding of a Tank Circuit is an inductor and a capacitor in resonance and we don't have a discrete capacitor here. That is why most people are calling this a Joule Thief in the comments. I am no expert on these circuits and was merely replicating Lidmotor's work as I explained in the video and I was pleased that I managed to get it working by following his video.
no cap? yeah, that'd be a joule thief then.
😊
start from tha side..it is must more eazy
Can somebody please tell me how to get it to work on batteries
How to get what working on batteries? The fan is an AC motor so that will not work on a DC battery, if that is what you mean.
Now put it back together!
The whole point of taking it apart was to salvage the parts, so it won't be going back together :-)
Question: if you remount that top part... It looks like a dc motor!
That is not a question, that is a statement.
GrandadIsAnOldMan OPS, sorry. LOL But try it. How knows? It looks like a dc motor + transformer.
AGloriousDawnLP I am still not sure what you are trying to say. It certainly is not a DC motor, it is a shaded pole motor, so it is AC. en.wikipedia.org/wiki/Shaded-pole_motor
how does that motor work..n
??*
+karan pandya it is an AC motor so I suggest you either Google it or search UA-cam, there are plenty of videos on the subject.
Ok ...thanks...i thought that it was a synchronous motor..
karan pandya I would have to google that too to understand how it works. As far as I am concerned it works off main electricity so it is AC powered. As I say I would google it to find exact way it works :-)
Hmmm....
R.I.P FAN MOTOR
Either I use it for parts or it goes to the recycling centre as scrap. Which is better?
You know you can reverse the direction of these motors by putting the armature in the other way around...
Reverse polarity
@@johnbourne4603 reversing polarity doesnt work just look at a sine wave
and thats not just theoretical i tested it
Dats just a Joule Thief!!!!!!
Yes, well more or less. I liked it's simplicity and the fact I found something to do with salvaged parts. What I found interesting was kick starting it by waving the magnet at it.
Looks to me like the copper band/wire on lames spreads the core as well as whatever else they were intended too do, cut it next time then try to spread it next to the coil,, by THEE way good video to me, don't let the negative comments stop you, if they were doing instead of searching, they might be finding.
Haha, thanks, every comment means a view on the counter so even the negative ones have their purpose. The copper winding is something to do with the way a shaded pole motor works and controls the direction en.wikipedia.org/wiki/Shaded-pole_motor
Can we make a transformer with that
I guess you could. It is a coil of wire so you could adapt it.
Yes you can with the motor, in my words this motor can actually count as a transformer since the shading coils are just shorts. By adding a secondary coil then you basically have a mains transformer.
digging a mountain , got rat .
Not sure if that is a compliment or an insult, but either way, thanks for taking the time to write it 🤣👍
I'm trying to stick my head in a plastic bag but it keeps zapping me....
You probably need to take your fingers out of the power socket.
My friend im struggling here to understand why and how that was useful, the battery will light the led on its own, so technically you just added a magnet on off switch to a led? What a waste of a good motor, you can come up with something more useful and better im sure. Either way great vids, easy to follow. Your accent is brill too haha
Thanks Max. Two points. 1. I never said it was going to be useful. 2. No you are wrong, you will not light a white LED with a 1.5v battery. Have a look through the video description where that is explained at length.
@@GrandadIsAnOldMan im not sure what size led you are using but i can light the ones i have with just 1, but i think they are smaller than the one you used in this video, and i wasn't being funny, i was trying to understand what it was you have made. I understand you are powering the led with the battery and i understand the coil. But i dont understand the other components. Is it possible with just the led, battery and the coil? I still have the L plates on tbh lol, trying to learn that's all bud. And thanks
@@maxwayne4323 read the video description. If you are able to light a white LED with 1.5 volts then it is one of the type that has an inbuilt circuit that boosts the voltage. The forward voltage for a white LED is about 3.2 volts. The size of the LED is irrelevant. I make this very clear in the video description.
@@GrandadIsAnOldMan i dunno it just looks like a normal led to me. It lights from a watch battery too, yano those flat ones, the only one it doesn't light is a Colour changing one so far, ill look into it, i got a box full from wish and they arrived super small. Just subbed to your other channel today, my son watched the videos lol, he loves them
@@maxwayne4323 until you have read the video description there really is no point in me continuing to reply. If you are talking about a CR2032 flat disc battery you will find they are 3 volts.
It's the battery that lights the LED @#$#@
+rudy edot yes the battery is probably at about 1.2 volts and a white LED needs a forward voltage of nearer 3 volts to light so the circuitry uses the coil to create a voltage spike high enough to light the LED. If you look at the video description there are several links to circuits commonly called Joule Thieves that will help you understand what is happening. There is no trickery here, just simple electronics working.
ممتاز جدا وهبلها حلبه
Thank you
tabom'
So how big of a coil do i need to run a car?
How would you run a car with a coil?
The Dumbing down of America!
I guess that must be the reason why so many people commenting here don't have a clue what is actually being demonstrated or how it works
jima
Couldn't you just power a LED with the battery alone? What am I missing here?... What's the point of all the extra work?
You will find further information in the video description. One basic point is that an LED will not light from a 1.5 volt battery. But, if you just wanted to light an LED you would use a different battery. Obviously that wasn't the point of the exercise.
you were supposed to put this fan on the chair and then to have a seat.
'
wtf i just watched !!!
I guess if you are not into these sorts of circuits it will mean nothing to you. I believe it is called a blocking oscillator circuit.
Im one of the people that dont want you to trash a perfectly good motor. Or at least identify the terminals before doing so.
So, exactly what would you do with it?
@@GrandadIsAnOldMan ive got a big battery issue going on at the moment and my best smart charger with recondition cycle is working overtime in a hot garage in texas. The 2 1/2" cooking fan inside of it crapped out. That thing produces a lot of heat. I dont have anything small enough to takes its place. I found a microwave fan id forgotten about. I couldnt see the mitor well enough to determine if it needed a capacitor or not. Couldnt see the terminal well enough to see the terminal with two wires though they are usually the center contact. Was wanting to avoid tearing into it to get a visual. I decided it would be better to know rather than gamble and fry it considering my next smallest fan is a huge squirrel cage for blowing water out of buildings and carpet after severe flooding occurs. Ive got half a dozen if those little fans around here and they are all fried from idiot friends connecting them to any voltage , reverse polarity, deciding they could use a thorough cleaning in a bucket of water you name it. Nice job on the demo though. Thise plates xame apart a whole lot easier than ive ever seen.
@@davidreynolds4684 Good luck with that 😊 I did this follow up video (2017) in response to people who wanted me to make a fan out of a fan - What can I do with that old Microwave Oven Fan Motor #2 ua-cam.com/video/F1IESEC1dik/v-deo.html