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Universal motor speed control by a microcontroller (arduino)

I am showing a method of using a CdS photoresistor to control a standard triac dimmer circuit that is wired to an electric drill motor (a universal motor). The CdS photoresistor is driven by an LED that is controlled by a PWM pin on an arduino microcontroller. This system provides a very easy way to control 120V AC devices with a single PWM pin, and not use any timing code or method to detect the zero-crossing of the AC power since this is done intrinsically in the circuit. It also offers true electrical isolation between the AC line voltage and microcontroller.

Duration : 0:5:26


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Juan Pablo

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17 responses to “Universal motor speed control by a microcontroller (arduino)”

  1. AwwwPishhh Avatar
    AwwwPishhh

    I? thought this was …
    I? thought this was really elegant and resourceful.

  2. Gabrielakamalinga Avatar
    Gabrielakamalinga

    Bro can u? please …
    Bro can u? please upload
    the circuit schematic tks !!

  3. Stanley Abraham Avatar
    Stanley Abraham

    great video…. i …
    great video…. i was wondering could you give me the circuit diagram of that speed control. also what? should be done to adapt it to 240 volts and connect higher loads like 1.5 hp.

  4. jluis212 Avatar
    jluis212

    Maldita? At&t me …
    Maldita? At&t me throttleo mi cell y ni siquiera puedo ver este video con esta lentitud de internet fuck. Att

  5. venvirupa Avatar
    venvirupa

    I would like to …
    I would like to control? a dual winding stepper motor that runs a breadmaking machine um its rated at 240 volts at 100 watts I think your solution would be great for that as the one that came in the machine broke down after 3 days and my arduino was sitting on the self so why not use it for the breadmaker 🙂 and it should work as most drills are about 500 watts. Once again good solution !!!!

  6. Afdhal Atiff Tan Amin Husaini Tan Avatar
    Afdhal Atiff Tan Amin Husaini Tan

    Doesn’t? the CdS …
    Doesn’t? the CdS photoresistor really is too slow for such application?

  7. AntonMadness Avatar
    AntonMadness

    @braga82 @2:00 he …
    @braga82 @2:00 he explains that the? board is from the drill trigger itselfs.

  8. AntonMadness Avatar
    AntonMadness

    Awesome!! I need? …
    Awesome!! I need? to regulate 4 drill motor, so this way it can be done easily with just one Uno 🙂 Thanks man!

  9. propellerhead2000 Avatar
    propellerhead2000

    I’d like to …
    I’d like to experiment with this and use a vactrol to replace the CdS.? It is a packaged version of what was hacked together in the vid. A VTL5C3 can handle 250V.

  10. sys22kh Avatar
    sys22kh

    is that? microchip …
    is that? microchip controller is easily available or need to buy from you, easy to use. plz

  11. sys22kh Avatar
    sys22kh

    how much cost it …
    how much cost it will required to buy this microchip controller. can? we use this in Ac motor? DC motor is not able to bear the load .. plz reply

  12. IstillHeartMyPrivacy Avatar
    IstillHeartMyPrivacy

    I agree with Hector …
    I agree with Hector – what’s so hard about triggering a TRIAC? You can measure the zero crossing with a zener diode and then start a timer. As far as projects that? use a microcontroller just to generate a PWM signal – that seems like a Rube Goldberg way to solve a problem. Didn’t people use 555 timers for that sort of thing once upon a time?

  13. braga82 Avatar
    braga82

    ok, thanks for? the …
    ok, thanks for? the reply, i guess i’ll have to dig in and do a little more research abou it.

    Best regards.

  14. braga82 Avatar
    braga82

    hi, i just saw the …
    hi, i just saw the video and at the moment i see myself in the need of making a? dc-ac 3phase inverter and i think i can do it the way you did for controling one phase with some modifications, could u send me a schematic or at least the reference of the conponents?.

    Thanks

  15. HectorHeadgear Avatar
    HectorHeadgear

    What’s so complex …
    What’s so complex about the other TRIAC method? An H11L1 is like 80 cents and in conjunction with a MOC30xx is designed specifically for phase control applications (see app note 3006). Seems like you’ve moved the complexity to your LED/cds concoction and basically built your own optocoupler LOL. Hey, it works, just seems like you went to a lot of trouble to avoid 1 extra semiconductor and a? few lines of code. Was it because you felt the PWM would be more reliable or were uncof. with interrupts?

  16. jcbrownproductions Avatar
    jcbrownproductions

    simple, brilliant …
    simple, brilliant solution. This is actually very helpful for a few projects I have in? the works. Thank you so much for posting this.

  17. Thetruthishere11 Avatar
    Thetruthishere11

    great vid.

    ?
    great vid.

    ?

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