Need help from someone who knows electonics very very well

ok so i to a motor from an rc plane i had when i was a kid to blow on my cfls to lower temps a bit .

but every charger i use gets really hot and after about an hour stop working completely

ive tried everything from 4.5v to 12v chargers with varying amps

so i need help ... why are the chargers heating and breaking? and how to i find one that will work?

it will use whatever battery that the plane took!! so youl need to find that out!!

i wouldnt reccomend linking it to a power supply, or try some regular type c batterys!!

the chances are that if the fan came from an electric rc plane then its probably an 18v fan

try a laptop power supply the whole thing cut the adaptor off the end and wire it to your fan.

or just use a decent pc fan


J

i used 9v before but they run out so fast its not worth the money.

why cant a power supply work, is there some weird electrical thing that i dont know about or what?

i just find it frustrating using batteries thats all

i already have 4 12v fans wired in a way that each is getting 8.5v from a 19v laptop charger.

if i put this fan on its own circuit coming off this charger would it kill my charger?

unsure. thnkfully i have lots of chargers to be able to test things as i work in IT

if it were me i would buy some AKASA APACHE PWM 120mm 54CFM fans they are moisture and dust resistant. you can run 2 using 1 x 12v 1000mA charger.

J

so i hooked it up to a 3v 300mA charger but its starting to get a lil hot

and i found out the original battery it use was a 6v 350mA battery if that means anything, but this battery also powered a servo adnd some leds when it was in the rc plane

wel that charger started to heat up so i pulled it and now i might give into the batteries again,.....fuck i hate batteries

you will have to go to radio shack and get an adjustable power supply. Its getting the power supplies hot and burning them up because the voltage or amperage (mA) is not enough. Hopefully you haven't damaged the motor, but i would invest in some PC fans, they are cheap - reliable - and available, and a bit safer than an open blade. I cant see your setup, but if it is what i am thinking, you better hope that thing doesn't get loose in there!!!

i would also add that the AKASA apache fans i recommended have 16db rating so they are really quiet.

http://www.misco.co.uk/applications/SearchTools/item-details.asp?EdpNo=412947&CatId=0

Link to the fans i use

J

If your no longer a kid, and had that motor for a long time then most likely the brushes in the motor have worn and oxidized causeing it to draw more current and batteries are rated in MAH (MilliAmpHours) which is not the same as the rating for a power supply

the advice to get a new 12v puter fan is sound otherwise you need the right voltage which you said was 6v and at least a 2 amp power supply which will still run hot but should not fail

tadamofo said:

ok so i to a motor from an rc plane i had when i was a kid to blow on my cfls to lower temps a bit .

but every charger i use gets really hot and after about an hour stop working completely

ive tried everything from 4.5v to 12v chargers with varying amps

so i need help ... why are the chargers heating and breaking? and how to i find one that will work?

Click to expand...

listen, and listen well:

you have a few things going against you-

#1- the voltage you are supplying the fan with, is wrong. plainly simple.
#2- you are not supplying enough available amperage to the fan.
#3- those two factors, are contributing to a factor known as voltage drop, or undervoltage
#4 undervoltage is the leading cause of motor failure, it makes the motor get hot to quickly.

solutions-
#1 get a 12vdc power supply. NOT a cell phone charger, a laptop power supply, or any other useless peice of shit you have lying around and think might work. 12vdc power supply... its what you need, and nothing else.
#2 on the 12vdc power supply that you are going to BUY, make sure it is rated for at least 1200ma, or, 1.2 amps, @ 12vdc
#3, ensure that if you are using more than one fan, that the fans are wired in parallel, and not in series. this will eliminate any remaining voltage drop
#4 and also, byu having the correct power supply, it will also allow your fans to spin fast enough to cool themselves properly, eliminating the ecess heat that voltage drop causes.



or you could just go to home depot, spend 30$ and buy a 120v duct booster fan, that runs at 500 cfm........ it will cost about 25 more than a power supply, but will last forever and eliminate any heat issues you have.