From time to time there is a need for a kind of fan, but small mod­els cost rel­a­tive­ly much. Do not rush to fork out, because a small fan can be eas­i­ly made with your own hands. In terms of effi­cien­cy, it is not infe­ri­or to pur­chased coun­ter­parts, and its cre­ation will require a min­i­mum amount of mate­ri­als.

Creating a fan from a cooler

The eas­i­est way to make a fan your­self is to use an unnec­es­sary cool­er (these are used in a com­put­er as a cool­ing sys­tem for com­po­nents).

Cooler fan

Not sur­pris­ing­ly, this method is the sim­plest, because the cool­er is just a small fan. It remains only to take a few sim­ple steps to give it its final shape and per­for­mance.

The cool­er itself is quite func­tion­al, but you need to pre­pare it for a non-stan­dard way of using it:

  1. Wires.

If the fan is locat­ed near the com­put­er, an ordi­nary unnec­es­sary USB cable will do. It needs to be cut and the insu­la­tion removed (same with the cool­er wires):

wire to fan

We are only inter­est­ed in two wires: red (plus) and black (minus). If there are oth­er col­ors in the cool­er or USB cable, feel free to cut them off and iso­late them, because they are absolute­ly unnec­es­sary and will only inter­fere.

  1. Com­pound.

After clean­ing, the wires must be con­nect­ed to each oth­er (it is enough to twist them tight­ly with each oth­er). Don’t mix up the col­ors. This threat­ens with seri­ous com­pli­ca­tions in the process of cre­at­ing a fan.

For twist­ing, 10 mm length is enough. If nec­es­sary, it is allowed to clean most of the wire, this is not scary, but much more will have to be insu­lat­ed.

  1. Safe­ty.

Remem­ber that prop­er insu­la­tion is the key to suc­cess and a guar­an­tee that the com­put­er or out­let will not short out. Bare wires should be sealed with elec­tri­cal tape (only in the absence of pow­er), and the thick­er it is, the bet­ter.

There is no par­tic­u­lar point in explain­ing what threat­ens the fall of “minus” to “plus”. If the red and black wires come into con­tact dur­ing the trans­mis­sion of elec­tric­i­ty, not only the USB wire / port, but also the com­put­er com­po­nents may burn out.

In prin­ci­ple, com­put­ers are not afraid of such moments if they are equipped with pro­tec­tion against volt­age surges. But when a wall out­let is used, fix­ing the wiring in the apart­ment will be much more dif­fi­cult than cre­at­ing a small fan.

There­fore, seri­ous­ly take care of the insu­la­tion of bare parts of the wires. Extra com­plex­i­ty is rarely need­ed.

  1. Final touch­es.

Do not for­get that a com­put­er cool­er is very light, but at the same time very fast. Even with a volt­age of 5 volts, its speed will be quite high. We con­sid­er this volt­age for a rea­son: the cool­er will per­fect­ly cope with its task, and the oper­a­tion will be as silent as pos­si­ble.

Due to the small dimen­sions of the device, vibra­tion and vibra­tion may cause it to fall. This should not be allowed for the fol­low­ing rea­sons:

  • such a cool­er can­not cause lethal cuts even dur­ing oper­a­tion, but there are no guar­an­tees that the device will not jump up and fly off, for exam­ple, in the face;
  • falling on a non-flat sur­face (on a pen­cil, pen, lighter), its blades can be dam­aged: frag­ments bro­ken off at such a rota­tion speed can cause irrepara­ble dam­age;
  • oth­er unfore­seen cir­cum­stances.

Fixed cooler fan

There­fore, it is impor­tant to fix the cool­er (with adhe­sive tape, glue) on some more sta­ble sur­face: a box, a wood­en block, a table.

  1. Addi­tion­al func­tions.

If desired, the fin­ished fan can be updat­ed exter­nal­ly, add a switch (so as not to pull out the cord every time), etc. But atten­tion is also paid to a method that rel­a­tive­ly well increas­es the effi­cien­cy of the device.

Sim­ply cut off the top of a plas­tic bot­tle and glue it (with a wide hole) to the cool­er frame. Thus, the air flow will be more pre­cise and direct­ed: the force of air move­ment will be stronger by about 20%, which is a pret­ty good indi­ca­tor.

This com­pletes the cre­ation of the fan, and it is ready for full-fledged work.

Disk fan

If the pre­vi­ous option does not suit you, and you want some­thing more com­plex, then con­sid­er cre­at­ing a fan your­self from com­put­er disks:

  1. Engine.

Since we do not use a cool­er, it is nec­es­sary to acquire some kind of motor that sets the blades of our future device in motion. In fact, you can use the motor of the already men­tioned cool­er of the cool­ing sys­tem, but this is too sim­ple.

You should find or buy a motor with a cer­tain part of it mov­ing (for exam­ple, a pro­trud­ing iron rod). Since we are mak­ing a fan from disks, then hav­ing such a rod would be the best option. Motors from an old VCR or play­er are also great, because they spin discs and cas­settes — just what we need for a spin­ning pro­peller in our fan.

Don’t use a motor from a wash­ing machine or even a past fan — they are extreme­ly strong. Due to self-assem­bly of the struc­ture, it will be very flim­sy. A strong motor in the first few sec­onds will spread the frag­ments of the blades around the room and fly off the base.[/stextbox]

If there is a run­ning motor, it must be fas­tened with wires in the pre­vi­ous­ly men­tioned form.

  1. Blades.

With a run­ning engine on hand, we need to con­cen­trate on the disks, which are the main com­po­nents of our fan. First, cut one into 8 equal pieces:


In order not to make a mis­take dur­ing the pro­ce­dure, you can pre-mark the disk with a pen­cil. It is best to use a sol­der­ing iron (there will be no sharp edges, it is safer), but reg­u­lar scis­sors will work.

After that, the disk should be slight­ly heat­ed with a lighter to make the mate­r­i­al more pli­able, and bend the wings in the man­ner of the blades, like con­ven­tion­al fans:

A disc heated with a lighter

You can do the same with a reg­u­lar plas­tic bot­tle:

Blades from a bottle

In the cen­ter of our pro­peller you need to put a wood­en bot­tle cap. If the size is too big — it can be planed.

  1. The rest of the parts.

As a cen­ter hold­ing the entire struc­ture, you can use a reg­u­lar toi­let paper roll sleeve:

Toilet paper roll

It should be fixed in the cen­ter of the sec­ond disk, which will serve as the foun­da­tion for the fan. From above, you can place half of the sec­ond sleeve, as seen in the pho­to, so that the motor is inside it. On it you need to hang the blades from the disk / bot­tle.

The fan is ready to work. Option­al­ly, you can add dec­o­ra­tive ele­ments to make the device look more pre­sentable.

And you can see clear­ly how such a fan is made from a bot­tle in this video.

Tips & Tricks

Addi­tion­al­ly, you should recall the extreme­ly impor­tant points when cre­at­ing a home­made fan:

  1. To fas­ten the parts to each oth­er, you must use high-qual­i­ty “super­glue”.

It is the one that can­not be peeled off even if desired. The entire struc­ture must be as sta­ble as pos­si­ble and not suc­cumb to vibra­tions and vibra­tions. Respon­si­bly and cov­er every­thing you see with glue, except for the blades and inter­nal parts of the engine.

  1. Take your time.

You run the risk of miss­ing an impor­tant detail, and this great­ly increas­es the chances that some­thing will go wrong dur­ing the oper­a­tion of the fin­ished fan. The con­se­quences can be very seri­ous.

  1. Don’t use bad parts.

If you do not need the motor that is used to cre­ate the engine, its per­for­mance may be in doubt. Make sure it lasts for a while and will be effec­tive.

Build­ing an engine from scratch is a high­ly spe­cial­ized process and requires good knowl­edge. Make sure that the moth­er­boards are in order, all the nec­es­sary con­nec­tions are sol­dered well, etc. It is bet­ter to check once again than to make anoth­er fan lat­er.

  1. Insu­la­tion.

We remind you once again: do not for­get about the high-qual­i­ty wind­ing of wires with elec­tri­cal tape. You should not save it, because short cir­cuits and their repair will force you to sac­ri­fice big expens­es. Per­haps even in terms of mon­ey.

A hand-held fan is quite com­pact, effi­cient and does its job well. It is not dif­fi­cult to make it if you take the pro­ce­dure respon­si­bly and fol­low the instruc­tions. There are no restric­tions on dimen­sions either: if you feel strong, feel free to start assem­bling a larg­er fan.

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