Can You Run a 12v Fan on 5v
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Discussion Starter · #1 ·
Hullo. Is it possible to run a 12V DC fan connected 5V? What modifications moldiness i make out? Because I'm intending to add 12V fans to my laptop computer cooler is it is possible. Thanks.
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Quotation mark:
Earlier Posted by crazydj 
Hi. Is it viable to run a 12V DC fan happening 5V? What modifications must i do? Because I'm intending to add 12V fans to my laptop cooler is it is possible. Thanks.
They wrecking bar wont turn. They might try to turn, but they wont. If they do, it testament be like 2rpm. Unless you had alot of amperage, which you pry dont. You would need alot of amperage to brand up for the loss of emf. Which would be really no different than fair-minded running 12v, at long last they both will deplete about the Saami amount of power considering you have the amperage to make up for the lost voltage.
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Some fans testament, some North Korean won't. Depends connected the fan itself. Some motors will running game fine with 5v, others won't kickoff.
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Discussion Starter · #4 ·
So how do i get it on which fans can turn and which cant? Are these written along the fan itself?
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Citation:
Originally Posted away {LSK} Otacon
They pry wont turn away. They might try to turn, but they wont. If they do, IT will be like 2rpm. Unless you had alot of amperage, which you pry dont. You would motivation alot of amperage to make up for the loss of potential dro. Which would be real no different than just running 12v, in the end they both will consume about the same amount of power considering you have the amperage to constitute for the unsaved voltage.
Incorrect... having a Lot of current does not mean anything since it won't be haggard. Also, fans gushing at 5V tranquillize spin at a few hundred RPMs.
All but fans leave not start up at 5v but many will run at 5v. The start up voltage is how much voltage the fan needs to overcome interia and begin to move the fan blades. One time the blades fetch up to speed, the rooter can run on much inferior voltage. All but fans list the commence up potential difference is around 7v. Give yours a try at 5v. If you take in your fans "squeeze" but not work, past the start upbound voltage is too low.
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yes information technology's fine. don't know about the wireing in a laptop though. exercise a voltmeter
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If they twitch, spin out the impellor, it should start. If IT doesn't, the magnet is too powerful to run connected 5V.
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Quote:
To begin with Posted by DuckieHo
Incorrect... having a wad of current does not mean anything since it won't be drawn. Also, fans running at 5V still spin at a hardly a hundred RPMs.
Most fans will not start up at 5v but many will run at 5v. The start up voltage is how practically voltage the winnow necessarily to overcome interia and begin to move the fan blades. Once the blades sire finished to speed, the fan can run on much less emf. Most fans list the start up voltage is around 7v. Give yours a try at 5v. If you see your fans "pinch" but not work, then the start up voltage is too low.
Correct me if im wrong duckie but a fan will non draw poker more watts at start upward than running it will all the same draw more current am i not correct? Having thought though i guess accretive Amps are really the same as increasing wattage assuming the resistance is the same
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Some fan, either A/C or D/C, will habituate more electrical power on startup until the rotor comes up to speed.
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True, due to the additional energy it requires to start a fan. However, if there isn't enough voltage then the fan won't start. Fans are never current starved unless you have less than 1A avaliable on the line. You can have a rooter along a 100000A line but if there is only 3-4v, the sports fan won't start.
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Cite:
Originally Posted by DuckieHo
Trustworthy, overdue to the additional DOE it requires to start in the lead a fan. However, if there isn't enough voltage then the fan won't come out. Fans are never latest ravenous unless you have to a lesser degree 1A avaliable on the line. You butt have a devotee on a 100000A wrinkle but if there is only 3-4v, the fan won't start.
Yup, it's every last polish to Electro Motive Force which translates into the electromotive force accross the coils within the fan. The up-to-the-minute is related to the number of turns on the stator coils. More turns = much resistance. V=IR, so more modern for the same emf.
OT: I have found that the legal age of fans DO start at 5V even when they are rated to start up at higher voltages.
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I was able to incline an 80mm case fan (thermaltake, fairly strong and soaked to turn away hand) by inverting the wires along it because it was too loud. indeed it is possible.
Source: https://www.overclock.net/threads/12v-fan-on-5v.261898/
