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Ask an Expert Forum Digitally Controlled Electrical Outlet
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Digitally Controlled Electrical Outlet

Former Member
Former Member over 14 years ago

I am working on teh design of a module that allows me to have a device pluged into it: say a PS3, but instead of the power coming from the house outlet directly, I want to put in my remote switch.  This sitch will allow me to turn on/off the power to this plug that the PS3 is pluged into via an dashboard application.  Now the trick is; since it has been over 10 years since I have done my EE work, that I want to have the right part for the digital switch.  I have quickly researched and found power MOSFETs are a likely candidate for this, but I am wanting to make sure that I get the right part for the job, so if you can help me find out what part would be great for this application that would be great. 

 

I also have a version 2 for this module, that it will allow me to measure the usage that is being pulled from this outlet, such as how much current, voltage, load, etc... and have that being logged to a data repository this way I can be aware of how much draw is being applied to the house supply and know if it is needed to have the outlet off, even when the device may be off.

 

I know this is not a new idea, and devices exist out there that do this kind of work, but I am wanting to build this one for learning and making a useful item for the home. 

 

Thank you,

Don

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  • Catwell
    0 Catwell over 14 years ago

    Don,

     

    Some Uninterruptible Power Supplies do all these things already. Data-logging and all.

     

    However, if you want to build a device to do it, you could try a relay. When a signal comes in, it opens, cutting off the AC signal.

     

    How do you want to trigger the system? From your PC, your phone, or a big button somewhere?

     

    Cabe

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  • nermash
    0 nermash over 14 years ago

    I am thinking about the simillar problem, and I still have to do some research whether to use SSR (solid state relay) or some power MOSFET as a switching device. In my case, switching will be controled from an mcu (it's an automated home project). I would advise you to put some optoisolators in the chain if you'll be using MOSFET, or use SSR that come with optical isolation on the die.

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  • Capper
    0 Capper over 14 years ago

    The easiest way to control an outlet is with a relay.  The second is with a triac.  Back when PCs had parallel ports, you could run 8 outlets from the port using triac optocouplers driving power triacs.  Look up how X10 systems work.

     

    Scott

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