+Synthusiast all depends on gear ratio. Since those spin quite fast, you could reduce through gears the speed and thus increase the torque. It could work. Good luck!

yeah same to you, the video is great but for noob like me is quite hard, if there any easy solution to make it reverse the rotation plz tel me

roynorw hi, bearing should not matter, I only discussed the electronic part of the object. Please expect the circuitry to be different in some modern fans, but coil swap will work exactly the same.

randomtronic thanks bro ill do a vid just in case it goes wrong you can tell me why if possible thanks

roynorw cool. good luck :)

This was just for fun, to see if it can be done.

bcs he dint have any use of reverse air flow

Has your brain improved in two years?

Hi, pc fans are brushless DC motors, and require switching between different windings of the stator to happen in sync with the rotation of the fan. That's what transistors (more likely dedicated ICs in a transistor package, often consisting of hall effect sensor and switching logic) do. Those generally are purpose made (to drive cost down) for manufacturers of the fans, and those parts ale very unlikely to be available to buy as a replacement.

@@randomtronic thank you

@@randomtronic WHAT NUMBER OF 2 TRANSISTOR

+Wah Ng it will reverse the airflow, but it is far less efficient that way due to shape of the blades. For good efficiency you need blades shaped like a mirror image. e.g. drones have 2 left rotating and 2 right rotating rotors. They look like mirror image.

Sounds like the setup the fan manufacturers have on their "counter-rotating" fan models. These models have two fans attached to each other where the front one is rotating its blades in the counter-clockwise direction while the rear one is this rotating its blades in the clockwise direction. The blades on the front fan are a mirror image of the rear fan in these assemblies which increases the airflow more than if you put two singular fans back to back.

+Wah Ng yep, exactly ;)

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+emranhossain tonmou thats what I wanted to try. After some tests, it turned out, that the motor is too weak. After attaching propeller, the motor is unable to spin it fast enough to generate usable lift. If you had 4 of those on a frame, it would fly. But if you add a battery to the frame and some more electronics, then it will stay grounded. Need more power :)

randomtronic so what I do now

In one word. Wtfish😂

Get a real job.

easiest option would be ebay/amazon :) if not possible then visit your local pc shop or repair shop.

get it in your computer

overvolt them to 15 volt nothing more or the caps will pop off

It would I think, but have not tried it - the magnet is glued in the metal cup.

I just tried that.. no luck, it spins in the same direction.

NO. suppose there is NSNS magnet if u reverse it it will be NSNS only, to reverse u must choose which coil u r energising first.

that way you just shifting the magnet against the blade by around 30 degrees depend on how many magnets in there. but reversing the electromagnet or coil might work because it will shift against the sensor.

Doug Chaney lol :)

But what if it's RGB ;)

Lol, where is the fan in that?

There are typically screw holes on one side, flipping it around made it near impossible to screw it back in, since there is no indentation in the flipside, unless you have access to longer screws.

juanfrancisco I thought I showed clearly what I did there. I did not reverse engineer entire driver circuit unfortunately, so can't post the schematic :( besides, there are as many circuits for fans as there are fan manufacturers - but if you want to do what I did there, that should work with every circuit out there. Thanks

but the spin is so weird , I think you made something wrong

Spin was fine, I just tested it with very low voltage so it spins slower and shows on camera ;)

randomtronic as it have two coils , I believed that there is some sort circuit at the base of the capacitors transistor and for reverse spin L2 must star first

@@randomtronic I only saw you cut one trace and put in one link. I don't see how that would reverse anything. You would really need to cut two traces and put in two links, methinks. I can't be sure without seeing the schematic. EDIT: I just reviewed the video and see that in fact TWO traces were cut but only the first cut was filmed, the 2nd cut performed off camera.. Also TWO links were installed but one of them was simply a solder bridge. So my comment was pointless. The two cuts and links do in fact reverse the coil polarities.

Go back to school and then get back to us.

no its not like that....i did this but unfortunately i burnt my fan by removing diode.

electronics doesn't work that way, lol.

+drag0n4122 it was intended to be the left way ;)

Jaja gòod one.... would you like to see some tutorials i do?

Sure, pm me.