AC Drill Speed Controller

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Due to high RPM of drilling machine,sometimes drill bit will be damaged. To avoid this problem I made this speed controller. We can use this for any type of AC motor's, saw's, fan etc... and also as light intensity controller.

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Step 1: Parts Needed

Step 2: Assembling

  • Drill two holes in the gang box. One for AC wire and another for dimmer controller.
  • Insert the dimmer in one of the hole and fix it.
  • Fix the AC socket.

Step 3: Connections

Wire according to the picture above

Step 4: Finally

Make a Label and attach it.. It's finished.

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    16 Discussions

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    VittorioZ

    5 months ago

    I don't mean to be unpleasant, I just feel frustrated:
    it is not actually a speed controller, it's an electrical power controller (I have it).
    If you choke your drill or whatever motor it will slow down.
    A speed controller would try to keep speed constant.
    EVERYBODY on the 'net makes this mistake.

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    saifusmani

    Question 5 months ago on Step 3

    diagram and photo is different of the wairing please check...

    FMKDRL0ITZFK77A.LARGE.jpgFKTVX9FITZFK749.LARGE.jpg
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    saadland

    1 year ago

    Great instruction. I ordered the same,and it is working well. however it is making a noisy sound,when I decreased the power, like ziiiii. When it is on full power,that noise is gone.

    Can I please tell me if yours is making that noise? It is a bit scary.

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    volodymyr str

    2 years ago

    It 's a good idea for angle grinding machine.

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    EllenR24

    2 years ago

    omg... yet another buy from shop, read manual, install as per instructions.... instructable. Did you re-type it all by your little self? or did you just cut and paste the manual that came with it?

    2 replies
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    rustybender

    2 years ago

    I like the idea, but I would use this sparingly. Running an electric motor at low voltage can damage the motor. The motor will run hot and wear out quicker.

    http://ecmweb.com/content/how-save-your-motors-dur...

    Dremel used to offer a variable speed controller box you could plug your Dremel (or other tools) into. It kept the voltage constant at all speeds so your tools were safe. I believe it modified the frequency instead of the voltage. There's probably something similar out there that would do the job without risking your tools.

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    BeachsideHank

    2 years ago

    These are indeed very handy to have. I would only make one suggestion though; to add a fuse for circuit protection, this controller may be used in several different applications so a safety device would make sense.

    1 reply