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SCR Motor Controller

Discussion in 'Sensors and Actuators' started by adamq, Jan 29, 2017.

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  1. adamq


    Dec 17, 2013
    You're right. Which made me realize it has to be something I did.

    And it was. I forgot to attach the negative side of the capacitors to the negative bus. Stupid. :)

    Minder, thank you so very much. You are the only reason I got this working!

    Learned a lot about DIACs, TRIACs and some more about resistors and capacitors.... And a a good lesson was learned about paying attention and dilligence.
    Last edited: Jan 31, 2017
    Mike Van In likes this.
  2. yoho2chn


    Jun 23, 2018
    Sorry guys bumping up this post. I recently bought a device which is running similar circuit but is designed for 220VAC. I am thingking how I could modify it to run on 110VAC instead of plug it into step up transformer.
    Here is the PCB look. The very left side(bottom red&yellow wire) goes to DC brushed MOTOR

    Attached Files:

    Last edited: Jun 23, 2018
  3. duke37


    Jan 9, 2011
    It should run on 110VAC without a transformer but you may need to reduce the value of the rheostat to get up to full speed.
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