What great video. I just took a discarded microwave apart and saw the fan. Thank you for the explanation and the schematic. You are very kind to share your great project and knowledge.
I have an Ohmite vintage fan that is just like this. It's got a round two piece enabled steel case that comes apart with two nuts. Inside is a microwave oven fan motor. There is a switch in the middle of the power cord like a table lamp. The 6" fan blade is a two bladed thing made of flexible plastic. It sits on a chromed steel circular stand you can move up and down. I got it yesterday for $3.00 at a thrift store, put some electric motor oil on the bearings, and it works as good as electronicsnmore's fan does; except without the nifty speed control. No wonder they don't make stuff like this, ultimate construction simplicity, standard microwave oven fan motors last a long LONGGG time, steel body and stand take some abuse. The back of it has a lot of holes, there are lots of the ventilation holes, but there are what looks like holes perfect for mounting different motors or maybe they they thought about an onboard switch. Well the holes are there, they were planned for something.
Great idea there! Instead of having two speeds, perhaps you could put a variable speed controller in there. Then you could just rotate a knob to adjust the speed.
That is a really nice project you did there, WAYYYY More high quality than actual fans sold at walmart and places like that. Very informative video, I enjoyed it :) At least microwave oven manufacturers bother to put good motors and well-balanced blades in their products
Hey, that looks really good, I found your video because I did the same thing and wanted to know how many watts it was using. Cheers for uploading this I'll have to check out more of your channel later
Says "Take the fan out and throw the rest of the microwave away." Then I scroll through the videos and see "How to make 1000 amp metal melter from microwave oven transformer." Lol, Hey, it made me subscribe😜🤣😂👍🏼
thanks man for the video. Just a question: I have a similar motor but rated for 220v. When I teared down the owen i kept the capacitor too, a 1uF/2100v (a little big but doesn't matter). Can it work?
I have no need to buy a CFM meter. The volume of air this fan can move is very large. The microwave oven fan on high speed will likely do a better job than a fan you would purchase at Home Depot or Lowes.
You are getting carried away, and making this into a big deal. Just use a microwave oven fan. I supplied the idea. It is now up to you to decide if you want to use that idea. Thanks.
Hi i work with 220VAC what diffrence change in capacitor? And i would the fan low noise. There are possibilty to add a Dimmer? without switch? Agree reply. Tks
Hello! I made everything very clear in the video. If you're not sure, you really shouldn't be playing around with mains power. You could get shocked. To learn more about electronics, please visit "talking electronics" website. Thanks
+electronicsNmore Alright, first time I didnt hear about the condensator and now ive seen the diagram in the description. I have one that says 0.9 µF and 2100V AC.Would it work or should I get one more similar to that of the vídeo? I got it from the same microwave that the fan.
can you share the math with capicitor? What stats are needed to make it safe. What stats control speed. this is great I have three now and will keep getting more. would like to have 4 speeds. the motor is a tank. If it has enough torque could be useful for a knife sharpener.
Brilliant idea couldn't you use a housing off a 12v 6" fan and adapt it could do with an earth to be safe the cap idea 3uf great stuff thank you I have 20 of these lol I will be busy lol
The link to the schematic is no longer available. I know I'm saying this like 10 years later, but. Would it be possible for you to share it again, please?
I just realized you got a 40w motor, so you used a 3uf cap. I’ve got a 20w motor, so should I use a 1,5 uf cap? (I tried the 3uf capacitor and it didn’t slow down the motor at all)
No, the car uses DC, the fan operates using AC. If you buy a cheapo cigarette lighter power inverter 60-75W, then you can power it with that. Thanks for watching!
mate i have a fan from a microwave... only two wires brown and yellow, no pole marking on it anywhere, which colour you think is live ? dont just want to assume brown.. cheers
@@electronicsNmore Actually, having a motor with 3 terminals is much better than 2. Because, motors with 3 terminals have 2 speed windings. So you don't need a capacitor to change the speed. There should be a sticker showing you which one is Neutral, Low, and High.
Did you notice which 2 terminals had wires on them? You can use a digital multimeter and measure the resistance across the terminals, Look for the 2 terminals that give you the highest Ohms reading. Thanks For Watching!
Somehow I flagged your comment (iphone makes the pop up JavaScript invisible but still allows me the ability to hit one of the options). Your comment was that it was supposed to be SPDT...but will DPDT work?
I ordered a couple of 3uf 250 volt capacitors for ceiling fans online for a few bucks each. Thanks for the reply. I'm working on my microwave oven fan as we speak.
Hello do you have a video or can you make one on witch cable to what pin the fan has i dont really know. Like where would live side go or hot and neutral oh and ground?
electronicsNmore - My fan has three pins, so live goes to the switch and then to the cap and the fuse then to either pin? Same with neutral either pin? Sorry like i said im new to this.
Thanks I have 3 of these fans now. The fan, magnets, micro switches, all great parts. I want to use the timer switch for my solder iron station. That way I will not leave it it by accident. Thanks for you vids. Never would have known about the parts before you video.
It is. Any time you can take items from the trash and turn them into highly useful things, that is a real accomplishment. This fan is the best fan I ever owned. I've used it for years. If you feel that way about my video, then maybe you should stick with videos pertaining to hydroponics/Cannabis. :-)
Very easy, Place the fan blade inside a metal dryer vent tube, and in front of the fan blades you would install resistive wire made into coils. Try 20ga A-1 resistive wire.
liljoey112 No. (6) 3.3uF caps in series equals only 150V(Too low), and the rating drops to 1/6th of 3.3uf or .55uf. (6) in parallel equals 25V rated at 19.8uf.
electronicsNmore 33uf 25v radial Tantalum caps should work correct? Also if i wanted another speed all i would have to do is increase the capacitance correct?
No. Tantalums are electrolytic. In order to make a NP cap from electrolytic caps, you connect the (2) neg leads together from (2) electrolytic caps and use the 2 pos leads as NP. More capacitance = more speed.
It's very simple. You need a SPDT switch, and the correct capacitor. Center is off on the switch. One leg of the switch goes directly to the fan and the other leg goes to the capacitor then to the same fan terminal. The other fan terminal is connected to the other leg of the AC line(Neutral). Thanks for watching!
@@electronicsNmore So it means, if i want to reduce fan speed 220vac in a 220vac system, i must add a capacitor Nonpolar 1uF 400Vac connected series to the fan?
Sure. You must use a 230v microwave in Holland. The fan inside a 230v microwave should be rated for 230V Thanks For Watching! Be sure to check out my video playlists.
Jerry Thompson That is highly unusual. The solution is to remove the 2 screws and nuts holding the fan/rotor in place, then flip it around to the other side and bolt it back together. :-)
I´m very sorry from my sister Daniela Martins I Like Your Videos are so Very Cool mate make a video of homemade vacuum cleaner fan centrifugal type with wood material
Why are you advising someone to throw the rest of the microwave away? I know that there's a dangerous capacitor in there, but discharging a capacitor should be no big deal for someone who is able to wire up a fan like that. For another thing, there are tons of other useful components in the microwave (including the capacitor!) that an electronics hobbyist would love to have. Not to mention the scrap value of the rest of the microwave.
Clearly you have not seen my other microwave oven videos. I suggest you do watch them. :-). I never advised to throw the oven away. If the AVERAGE PERSON was unable to repair a microwave oven(NOT into electronics), then keep the fan before throwing the oven away and make this easy project. I wanted this project to be simple, and also wanted to make sure people avoided the HV capacitor. Thanks For Watching
B. Urtzerka You don't know what you're talking about. This fan has been in use for YEARS on my desk. I guess you failed to notice the holes in the enclosure to allow air flow.
