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Thread: Small guide to making an easy, solderless power adaptor for multi PC fans

  1. #101

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    well i have tried 2 chargers and still no joy. could i just wire it to a house hold plug ?with a 3 amp fuse ?
    bongo

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  3. #102

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    PLEASE DONT! what kind of adapter are u using?
    you may have burnt it already, if u conneceted more Amp then specified on adapter. try to connect just one 4 starters and if ur fan doesnt run, try switching wires.
    if still no go, then u probably burnt the adapter and the fans, it happened to me, cous i just had to try to connect 0.5 Amp of fans on a 0,400 Amp adapter. lost an adapter and 3 fans

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  5. #103

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    MUsss
    PLEASE DONT! what kind of adapter are u using?
    I have a old nokia charger
    INPUT
    ac 100-240 v
    50-60 hz/100ma
    OUTPUT
    dc 5.0 v 350 ma
    this has 2 wires black and white
    FAN IS
    dc 12v 0.35a
    this has 4 wires black,yellow.green,blue

    not sure what wire goes where thou as electrical 1o1 says
    Brown/Red = Live
    Blue/Black = Neutral
    Green/Yellow = Earth

    And i have all the colours mentioned.
    Just had a stupid thought as typing, as i have black/blue and green/yellow do i just wire these together and connect them to black-black and blue and white - green and yellow ?
    thanks for your time
    bongo

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  7. #104

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    U are gonna need a bether adapter, u need more amps, as u can see ur fan runs af 0,35 amp, wich is the same as ur adapters output (could be the reson it s not working), and it s good to have more amp as u r consuming.

    my advise: get a 9 V adapter with at least 0,5 amp or even greater, so u can connect more then just ine fan on to it, and the 5 V adapter u have is gonna turn the fan much slower then a 9 or 12 V one.

    the wires: - connect the black wire from fan to black one from adapter
    - the white wire from adapter connects to one of the remaining 3 wires from fan, most fans have just 3 wires: black, red and yelow, and the yellow one is in ur case useless and can be removed, but before u do that try this: connect the black one as told before, then try all the other wires one by one (i would say it s the blue one) and connect them with the white one from the adaptor, just one at the time (plug it in when u connect bouth wires and give it a go)
    should work

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  9. #105

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    ok as advised i have found another plug with 13 amp and 240 volts it is a energy saving plug
    found there ----> http://www.cableuniverse.co.uk/ir-st...-learning.html
    it has plenty of amps and only 3 wires
    brown/blue/yellow should be easier as long as the sensor doesent cause me any issues
    not sure it will as its only the 3 wires on the lead.
    thanks for your time muss
    bongo

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    GEORGE (10-03-20)

  11. #106

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    i put a pc fan in mine yesterday i used an old motorola charger (the small usb one) and it had a red black and yellow wire the same as the fan so i just connected the wires and it worked fine, seems alot easier than this method but im unsure of the saftey of it

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  13. #107

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    nice guide thanks ever s much!

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  15. #108

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    Quote Originally Posted by Munkeyboi View Post
    Hey

    As some of you may or may not know, im gonna monkey around and make my own fan controller box, with speed controller. Current methods at the moment involve lots of hacking wires, soldering, using a PC power supply and i think its all pretty messy. Heres my idea https://www.thctalk.com/cannabis-foru...ad.php?t=14462

    But since i need something in the meantime and im a stoner and not finished project yet, I've had to whip something up in the meantime and I'd thought i'd share.

    So here goes.

    You will need........ (most of stuff can be found at maplins)

    • A pc fan with connectors intact (make a note of amps of all fans used)


    • 2 x 4 pin molex to 3 pin fan convertor/connector (1 per fan, depending on the type you buy. In my example 1 per fan you used) If only using one fan, you'll still need another molex connector to finish the job (or you'll have to solder). This can be found easily from an old psu,


    • A 12v power adaptor (please take note of the Amp output)



    • Electrical Tape, Wire cutters/strippers


    Things to note....

    Add up the amps, usually .10 or .25 on fans. If they are greater than the Amp output on your adapter. You need less fans, or an adapter with a higher amp output.

    Step 1:

    Cut the top off the power adaptor. Leave some wire on the end of the bit you've cut off, You might want to use it later. I intend to in my fan controllers next incarnation.


    Snip the wire in the middle and pull the ends apart (if you have a twinned cable, IE both in seperate lil plastic covered tubes)





    Strip about 5-8mm of the plastic cover from end of wires and twist so no bits of wire are sticking out.



    Step 2:

    Get your molex connector and find the holes with the wires going into the 4 pin connector



    Place your two wires OUTSIDE the holes. not in them as the connectors wont connect together. Ensuring no bits of copper are loose or touching each other.



    Insert the 2nd molex connector into it to secure wires in place. Please be careful the wires dont move or you dont strip the cable cover. You maye wish to use a flat screwdriver as a wedge so it can pass over the cables.



    Alternatively, if you have a crimping set, you can crimp the power adaptor into a molex pin. Can be found at maplins too.

    Or you can solder onto the pins direct. but that sucks in my honest opinion and i cant be arsed.

    how ever you connect it, tidy and cover with electrical tape.



    Step 3:
    Plug in your fan/fans to the 3 pin fan connectors.



    Then plug power adaptor into the mains. WARNING - Dont be a moron. Plug it into a power socket DIRECTY, with a switch on it. And have the power switch to off before you plug it in.



    Switch on and hopefully ta da



    Writting the damn thread n taking pics took longer than making this gizmo. lol

    Hope this helps.
    Good one M8, always like to find a good read like this.

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  17. #109

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    is it safe to run a 12vfan from a 15v adapter?


    Every dog will have his day.

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  19. #110

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    Quote Originally Posted by canine View Post
    is it safe to run a 12vfan from a 15v adapter?
    It's almost certainly safe.

    I run fans at around that Voltage and they work for me, but the results vary by fan — Some run faster than they do at 12 Volts, some run at the same speed.

    I've never had one overheat or fail, but that's no guarantee of anything.

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