switching of AC device using touchpad.

Discussion in 'General Electronics Chat' started by HIREN DAVE, Oct 16, 2013.

  1. HIREN DAVE

    Thread Starter New Member

    Jul 18, 2013
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    Hello friends,

    I am using my household device i.e. working on AC. It contains its own switch for on and off. Now i want to use touch pad only for switch on the device and switch off the device. what are easiest possible solutions?

    thanks in advance...
     
  2. Wendy

    Moderator

    Mar 24, 2008
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    A simple capacitive plate would work, but be sure to isolate the AC somehow. A wall wart (for DC power) such as an old phone charger (they tend to be small) and a SSR (Solid State Relay) comes to mind. I might sketch something up as a starter idea, but it would be untested.

    I take it you want a touch on/touch off switch? What kind of current requirements are you thinking about? I am assuming USA standards, 120VAC 10A max.
     
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  3. HIREN DAVE

    Thread Starter New Member

    Jul 18, 2013
    9
    0
    ok.

    right now my current requirement is 1A to 5A but later it will increase to 16A.
    voltage is 230V (as per Indian standard).
     
  4. Wendy

    Moderator

    Mar 24, 2008
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    The current requirements do present a small problem, but only with heat sinking. SSRs do have current limits (though you can by ones that are quite large) and will get hot if they are carrying a lot of current. Do you like to experiment?
     
  5. Wendy

    Moderator

    Mar 24, 2008
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    Here is the drawing I promised. If it works, who knows?

    [​IMG]

    R3 is a sensitivity setting.
     
  6. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    I would have thought by "touch pad" they meant a tablet (Ipad/Android,etc...)
    maybe/guess not...
     
  7. MrChips

    Moderator

    Oct 2, 2009
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    Google touch switch.
     
  8. Wendy

    Moderator

    Mar 24, 2008
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    You're probably right, the OP will let us know.
     
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